Pub Date : 2022-07-06DOI: 10.3329/jesnr.v13i1-2.60689
M. Hoque, Mz Islam, Anm Ibna Sina, Sumeet Singh, TR Budha
Effect of red and blue light on seed germination and seedling growth were studied in rice (Oryza sativa L.). Rice seeds were germinated in dark (control) and two types of light emitting-diodes (LED): red and green in the laboratory. The photoperiod of 6 h light and 18 h dark for LEDs treatment and 24h dark treatments with 24/18 ± 2 °C day/night temperature and 78± 2 % relative humidity were maintained in the growth room. Seed germination percentage under red light increased significantly when compared with the control; however, in blue light, germination percent decreased with little difference. First leaf length, first leaf blade length, root length, seedling fresh and dry weight increased under red and blue lights in most of the varieties. Highest germination (98%), longest root (8.18 cm) and high seedling fresh weight (0.527 g) and seedling dry weight (0.061g) in BRRIdhan71 and longest leaf in BRRIdhan75, were recorded under red light. Highest germination (96%), seedling fresh weight (0.414g) and seedling dry weight (0.047g) in BRRIdhan71, longest first leaf (6.50 cm) in BRRIdhan75 and longest root (9.37 cm) in BRRIdhan87 were recorded under blue light. First leaf blade showed only positive correlation with root length (r = 0.489), whereas seedling fresh weight showed complete correlation with seedling dry weight (r =1). Response index was positive in root length, seedling fresh and dry weight under red light. First leaf blade length, seedling fresh and dry weight had the positive response index under blue light. Within the visible spectrum, varying wave lengths of red and blue light alone altered the growth and morphology of rice seedlings, and variable reactions to illumination depended on the rice varieties, necessitating further research. Environ. Sci. & Natural Resources, 13(1&2): 56-62, 2020
{"title":"Effect of Light-Emitting Diodes on Different Growth Stages of Rice","authors":"M. Hoque, Mz Islam, Anm Ibna Sina, Sumeet Singh, TR Budha","doi":"10.3329/jesnr.v13i1-2.60689","DOIUrl":"https://doi.org/10.3329/jesnr.v13i1-2.60689","url":null,"abstract":"Effect of red and blue light on seed germination and seedling growth were studied in rice (Oryza sativa L.). Rice seeds were germinated in dark (control) and two types of light emitting-diodes (LED): red and green in the laboratory. The photoperiod of 6 h light and 18 h dark for LEDs treatment and 24h dark treatments with 24/18 ± 2 °C day/night temperature and 78± 2 % relative humidity were maintained in the growth room. Seed germination percentage under red light increased significantly when compared with the control; however, in blue light, germination percent decreased with little difference. First leaf length, first leaf blade length, root length, seedling fresh and dry weight increased under red and blue lights in most of the varieties. Highest germination (98%), longest root (8.18 cm) and high seedling fresh weight (0.527 g) and seedling dry weight (0.061g) in BRRIdhan71 and longest leaf in BRRIdhan75, were recorded under red light. Highest germination (96%), seedling fresh weight (0.414g) and seedling dry weight (0.047g) in BRRIdhan71, longest first leaf (6.50 cm) in BRRIdhan75 and longest root (9.37 cm) in BRRIdhan87 were recorded under blue light. First leaf blade showed only positive correlation with root length (r = 0.489), whereas seedling fresh weight showed complete correlation with seedling dry weight (r =1). Response index was positive in root length, seedling fresh and dry weight under red light. First leaf blade length, seedling fresh and dry weight had the positive response index under blue light. Within the visible spectrum, varying wave lengths of red and blue light alone altered the growth and morphology of rice seedlings, and variable reactions to illumination depended on the rice varieties, necessitating further research. \u0000Environ. Sci. & Natural Resources, 13(1&2): 56-62, 2020","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81920068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-06DOI: 10.3329/jesnr.v13i1-2.60697
N. Huda, Ma Islam, M. Hasan, M. Hossain
The sanitation pattern is not so good in rural areas of Bangladesh. About 2.2 million children died of diarrhea disease around the world and these deaths represent approximately 15% of all child deaths under the age of five in developing countries. For this study, two rural areas of Satkhira District of Bangladesh were selected. The information was collected from households that had children under 5 years old. The majority of the locals are illiterate and impoverished. They have a low income and are not well aware of sanitation and children’s diarrhea. Most people use tubewell water for drinking purposes and others use ponds, rivers and hand pump water for domestic purposes. Water, sanitation, and hygiene interventions reduce diarrheal disease on average by between one-quarter and one-third. New sanitary solutions are required, and the process of acquiring latrines and sewers must be facilitated and supported both legislatively and financially. Public authorities must continue to be responsible for the provision of water that is free of fecal contaminants. In the private domain, hygiene promotion should focus on the elimination of human stools from the domestic environment. We should ensure safe sanitation, clean water and a hygienic environment for children and their survival. Environ. Sci. & Natural Resources, 13(1&2): 100-109, 2020
{"title":"Sanitation Pattern and its Impact on Child in Relation to their Diarrheal Disease of two Upazilla under Satkhira District","authors":"N. Huda, Ma Islam, M. Hasan, M. Hossain","doi":"10.3329/jesnr.v13i1-2.60697","DOIUrl":"https://doi.org/10.3329/jesnr.v13i1-2.60697","url":null,"abstract":"The sanitation pattern is not so good in rural areas of Bangladesh. About 2.2 million children died of diarrhea disease around the world and these deaths represent approximately 15% of all child deaths under the age of five in developing countries. For this study, two rural areas of Satkhira District of Bangladesh were selected. The information was collected from households that had children under 5 years old. The majority of the locals are illiterate and impoverished. They have a low income and are not well aware of sanitation and children’s diarrhea. Most people use tubewell water for drinking purposes and others use ponds, rivers and hand pump water for domestic purposes. Water, sanitation, and hygiene interventions reduce diarrheal disease on average by between one-quarter and one-third. New sanitary solutions are required, and the process of acquiring latrines and sewers must be facilitated and supported both legislatively and financially. Public authorities must continue to be responsible for the provision of water that is free of fecal contaminants. In the private domain, hygiene promotion should focus on the elimination of human stools from the domestic environment. We should ensure safe sanitation, clean water and a hygienic environment for children and their survival. \u0000Environ. Sci. & Natural Resources, 13(1&2): 100-109, 2020","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76883303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-06DOI: 10.3329/jesnr.v13i1-2.60695
M. Mahmud, M. Hossain, S. Shuvo, M. Reza, M. Abedin
Banana peel and pumpkin seeds are under-utilized by-products or wastes of the household and food processing industry but these could be rich in valuable nutritive compounds. Having a scientific database on the chemical and proximate analysis of the plants cultivated in the particular region would be helpful to the food product manufacturer, educator, researcher, public health personnel, policymaker, and population under food stress. Literature indicates that the nutritional and chemical composition of these under-utilized materials has not been characterized previously. The present study was designed to examine the nutritional, antioxidants, vitamin C, total phenolic and flavonoid contents of peels and seeds flour of selected fruits. Nutritional analysis reveals that the peel flour of Musa acuminata is rich in crude fiber 14.13%, carbohydrate 60.38%, and seed flour of Cucurbita maxima is rich in protein 30.05%, fat 43.81%, dietary fiber 13.81%. BPF showed more antioxidant activity (86.8%), total phenolic and flavonoid content than PSF, which is rich in vitamin C content (9.23 mg/100gm). Industrial by-products can be processed into value-added products such as flour that is more easily stored for further uses. By-product flour can easily include in food formulations due to its excellent nutritional qualities. Optimization of its use is beneficial in terms of nutritional and economical points of view. Environ. Sci. & Natural Resources, 13(1&2): 87-93, 2020
{"title":"Potentiality of Banana and Pumpkin Fruits Residues as a Cheap Source of Valuable Nutrients","authors":"M. Mahmud, M. Hossain, S. Shuvo, M. Reza, M. Abedin","doi":"10.3329/jesnr.v13i1-2.60695","DOIUrl":"https://doi.org/10.3329/jesnr.v13i1-2.60695","url":null,"abstract":"Banana peel and pumpkin seeds are under-utilized by-products or wastes of the household and food processing industry but these could be rich in valuable nutritive compounds. Having a scientific database on the chemical and proximate analysis of the plants cultivated in the particular region would be helpful to the food product manufacturer, educator, researcher, public health personnel, policymaker, and population under food stress. Literature indicates that the nutritional and chemical composition of these under-utilized materials has not been characterized previously. The present study was designed to examine the nutritional, antioxidants, vitamin C, total phenolic and flavonoid contents of peels and seeds flour of selected fruits. Nutritional analysis reveals that the peel flour of Musa acuminata is rich in crude fiber 14.13%, carbohydrate 60.38%, and seed flour of Cucurbita maxima is rich in protein 30.05%, fat 43.81%, dietary fiber 13.81%. BPF showed more antioxidant activity (86.8%), total phenolic and flavonoid content than PSF, which is rich in vitamin C content (9.23 mg/100gm). Industrial by-products can be processed into value-added products such as flour that is more easily stored for further uses. By-product flour can easily include in food formulations due to its excellent nutritional qualities. Optimization of its use is beneficial in terms of nutritional and economical points of view. \u0000Environ. Sci. & Natural Resources, 13(1&2): 87-93, 2020","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83080443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-06DOI: 10.3329/jesnr.v13i1-2.60693
M. Parvez, N. Jashin, MT Yesmin, M. Reza, N. Akter
Amla is sour and astringent taste fruit, making the fruit less palatable to eat directly as fresh fruit; hence it can be consumed in processed form. Preparing powder and candy from amla fruit can increase its acceptability, the market value of it and be utilized to develop new value-added products. Considering this, the present study was designed to evaluate the nutritional compositions, vitamin C content, beta-carotene content, and antioxidant activity of fresh amla and two amla products such as amla powder and amla candy. Between the two products, amla powder contained a significantly (P < 0.05) high amount of dietary fiber (17.67%), protein (4.98%), and ash (9.82%) contents than fresh amla and amla candy. Between two products, vitamin C (298.3 mg/100gm) and beta-carotene (113.55 mg/100gm) contents were significantly (P < 0.05) high in amla powder. But amla candy showed high antioxidant activity (77.75%) than amla powder (59.2%). Results of this study suggested that amla and amla products are a good source of nutrients like vitamin C and different bioactive components. Amla can be utilized in diets as candy and dehydrated powder or flour which is easily included in food formulations due to its excellent nutritional qualities. Optimization of its use is beneficial in terms of nutritional and economical points of view. Environ. Sci. & Natural Resources, 13(1&2): 82-86, 2020
{"title":"Proximate, Phytochemical and Antioxidant Activity of Amla Powder and Amla Candy","authors":"M. Parvez, N. Jashin, MT Yesmin, M. Reza, N. Akter","doi":"10.3329/jesnr.v13i1-2.60693","DOIUrl":"https://doi.org/10.3329/jesnr.v13i1-2.60693","url":null,"abstract":"Amla is sour and astringent taste fruit, making the fruit less palatable to eat directly as fresh fruit; hence it can be consumed in processed form. Preparing powder and candy from amla fruit can increase its acceptability, the market value of it and be utilized to develop new value-added products. Considering this, the present study was designed to evaluate the nutritional compositions, vitamin C content, beta-carotene content, and antioxidant activity of fresh amla and two amla products such as amla powder and amla candy. Between the two products, amla powder contained a significantly (P < 0.05) high amount of dietary fiber (17.67%), protein (4.98%), and ash (9.82%) contents than fresh amla and amla candy. Between two products, vitamin C (298.3 mg/100gm) and beta-carotene (113.55 mg/100gm) contents were significantly (P < 0.05) high in amla powder. But amla candy showed high antioxidant activity (77.75%) than amla powder (59.2%). Results of this study suggested that amla and amla products are a good source of nutrients like vitamin C and different bioactive components. Amla can be utilized in diets as candy and dehydrated powder or flour which is easily included in food formulations due to its excellent nutritional qualities. Optimization of its use is beneficial in terms of nutritional and economical points of view. \u0000Environ. Sci. & Natural Resources, 13(1&2): 82-86, 2020","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88586857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-06DOI: 10.3329/jesnr.v13i1-2.60683
M. Siddiquee, M. Miah, HM Abdullah, T. Afroz
The present study uses Remote Sensing techniques to monitor long-term wheat cultivation in Thakurgaon Sadar Upazila. Multi-spectral Landsat images from 1999 to 2019 at five years intervals were collected at the maximum growth stage of wheat. The images were processed by QGIS, ArcGIS, and R software with the random forest supervised classification. The findings revealed that images were classified and separated the crops successfully due to cloud-free images and pure pixels. The results show that the wheat area was decreased from 1999 (16349 ha) to 2019 (9161 ha). It was due to the transformation of the wheat area into other crop areas. The shrinkage rate of wheat areas was much higher (10.93 %) in 1999-09 than in 2009-19. It was due to a sudden decline in blast disease during 2005-09 and increased again. The shrinkage of the wheat area has been driven mainly by climate change influencing profitability. Prolonged hydrological drought introduced maize and potato in the wheat area. The benefit-cost ratio decreased gradually in wheat but increased in maize and potato. The study demonstrates that remote sensing is an effective method for wheat crop area monitoring. This study will help us understand the status of long-term wheat cultivation. Environ. Sci. & Natural Resources, 13(1&2): 25-37, 2020
{"title":"Monitoring Long-Term Wheat Cultivation and Climatic Drivers for Land Use Change: A Case Study Using Remote Sensing at Thakurgaon Sadar in Bangladesh","authors":"M. Siddiquee, M. Miah, HM Abdullah, T. Afroz","doi":"10.3329/jesnr.v13i1-2.60683","DOIUrl":"https://doi.org/10.3329/jesnr.v13i1-2.60683","url":null,"abstract":"The present study uses Remote Sensing techniques to monitor long-term wheat cultivation in Thakurgaon Sadar Upazila. Multi-spectral Landsat images from 1999 to 2019 at five years intervals were collected at the maximum growth stage of wheat. The images were processed by QGIS, ArcGIS, and R software with the random forest supervised classification. The findings revealed that images were classified and separated the crops successfully due to cloud-free images and pure pixels. The results show that the wheat area was decreased from 1999 (16349 ha) to 2019 (9161 ha). It was due to the transformation of the wheat area into other crop areas. The shrinkage rate of wheat areas was much higher (10.93 %) in 1999-09 than in 2009-19. It was due to a sudden decline in blast disease during 2005-09 and increased again. The shrinkage of the wheat area has been driven mainly by climate change influencing profitability. Prolonged hydrological drought introduced maize and potato in the wheat area. The benefit-cost ratio decreased gradually in wheat but increased in maize and potato. The study demonstrates that remote sensing is an effective method for wheat crop area monitoring. This study will help us understand the status of long-term wheat cultivation. \u0000Environ. Sci. & Natural Resources, 13(1&2): 25-37, 2020","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77993907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-06DOI: 10.3329/jesnr.v13i1-2.60688
M. Hoque, N. Jahan, A. Biswas, Mz Islam, M. Rahman
The objectives of this study was to investigate the effect of green light-emitting diodes (LEDs) on rice (Oryza sativa L.) seed germination as well as seedling growth. The rice seed of BRRIdhan52, BRRIdhan81, BRRIdhan86 and BRRIdhan92 were germinated and nursed in control environment in full dark (no supplemental light) and under green light (6 h/day with18 h dark). The results showed that germination percent, leaf length, leaf blade length, seedling fresh and dry weight were enhanced by green lighting. Highest germination percent (88%) was counted in BRRIdhan86 and longest first leaf (7.24 cm) with widest leaf (7.24 cm) in BRRIdhan92 under green light. Green light not only enhance the first leaf blade length also increased the dry matter production. High positive significant correlation were observed in seedling fresh weight and dry weight. Correlation value (r) was positive and significantly ranged from 0.999 to 0.981. Green light remarkably promote the leaf surface area, root morphology which ultimately contributed to vigorous seedling growth with an increase 6 to 156 times than rice seedlings grown in dark for the studied character. As a result, the effects of green light emitting diodes (LEDs) on rice seed and seedlings for plant cultivation under controlled-environment conditions are promising, and they may affect subsequent phases of growth and development. More research on green light and other solid state light sources are needed for use in plant lighting designs, as well as the ability to match wavelengths to plant photo sensors for better production and influence on plant morphology and metabolism. Environ. Sci. & Natural Resources, 13(1&2): 50-55, 2020
{"title":"Growth of Rice Plant Under Green Light- Inefficient or Neglected","authors":"M. Hoque, N. Jahan, A. Biswas, Mz Islam, M. Rahman","doi":"10.3329/jesnr.v13i1-2.60688","DOIUrl":"https://doi.org/10.3329/jesnr.v13i1-2.60688","url":null,"abstract":"The objectives of this study was to investigate the effect of green light-emitting diodes (LEDs) on rice (Oryza sativa L.) seed germination as well as seedling growth. The rice seed of BRRIdhan52, BRRIdhan81, BRRIdhan86 and BRRIdhan92 were germinated and nursed in control environment in full dark (no supplemental light) and under green light (6 h/day with18 h dark). The results showed that germination percent, leaf length, leaf blade length, seedling fresh and dry weight were enhanced by green lighting. Highest germination percent (88%) was counted in BRRIdhan86 and longest first leaf (7.24 cm) with widest leaf (7.24 cm) in BRRIdhan92 under green light. Green light not only enhance the first leaf blade length also increased the dry matter production. High positive significant correlation were observed in seedling fresh weight and dry weight. Correlation value (r) was positive and significantly ranged from 0.999 to 0.981. Green light remarkably promote the leaf surface area, root morphology which ultimately contributed to vigorous seedling growth with an increase 6 to 156 times than rice seedlings grown in dark for the studied character. As a result, the effects of green light emitting diodes (LEDs) on rice seed and seedlings for plant cultivation under controlled-environment conditions are promising, and they may affect subsequent phases of growth and development. More research on green light and other solid state light sources are needed for use in plant lighting designs, as well as the ability to match wavelengths to plant photo sensors for better production and influence on plant morphology and metabolism. \u0000Environ. Sci. & Natural Resources, 13(1&2): 50-55, 2020","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85743542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-06DOI: 10.3329/jesnr.v13i1-2.60681
TK Acharjee, M. Ullah, K. Sojib, M. Hasan
Reference crop evapotranspiration (ETO) is an important hydro-meteorological phenomenon, which is influenced by changing climate. This study estimated the trends ETO and identified the correlation of changes in ETO with climatic parameters in Khulna and Rajshahi districts of Bangladesh. Daily observed climatic parameters of thirty years (1984– 2013) were used in CropWat model to estimate changes in monthly and seasonal ETO. Trend analysis of ETO and climatic parameters were done by Mann-Kendall test and Sen’s slope estimation. Correlation between ETO and climatic parameters were analyzed. The results showed a decreasing trend of ETO over most of the period of the year in Khulna and Rajshahi districts. On monthly basis estimation, decreasing trends of relative humidity, wind speed and sun shine hours in Khulna district, and decreasing trends of wind speed and sun shine hours in Rajshahi district played the dominant roles for the decreasing rate of ETO under recent climate change. On seasonal basis estimation, decreasing trends of relative humidity, wind speed and sun shine hours in Khulna district, and decreasing trends of wind speed and sun shine hours in Rajshahi district played the dominant roles for the decreasing rate of ETO under changing climatic condition. Changes in ETO were most strongly correlated with sun shine hours and most weakly with minimum temperature for both Khulna and Rajshahi. Wind speed was most strongly correlated with ETO for Dry/Rabi season. The findings of this study would be useful for agricultural water management of Bangladesh. Environ. Sci. & Natural Resources, 13(1&2): 1-12, 2020
{"title":"Trend of Reference Crop Evapotranspiration and its Correlation with Climatic Parameters in Khulna and Rajshahi Districts of Bangladesh","authors":"TK Acharjee, M. Ullah, K. Sojib, M. Hasan","doi":"10.3329/jesnr.v13i1-2.60681","DOIUrl":"https://doi.org/10.3329/jesnr.v13i1-2.60681","url":null,"abstract":"Reference crop evapotranspiration (ETO) is an important hydro-meteorological phenomenon, which is influenced by changing climate. This study estimated the trends ETO and identified the correlation of changes in ETO with climatic parameters in Khulna and Rajshahi districts of Bangladesh. Daily observed climatic parameters of thirty years (1984– 2013) were used in CropWat model to estimate changes in monthly and seasonal ETO. Trend analysis of ETO and climatic parameters were done by Mann-Kendall test and Sen’s slope estimation. Correlation between ETO and climatic parameters were analyzed. The results showed a decreasing trend of ETO over most of the period of the year in Khulna and Rajshahi districts. On monthly basis estimation, decreasing trends of relative humidity, wind speed and sun shine hours in Khulna district, and decreasing trends of wind speed and sun shine hours in Rajshahi district played the dominant roles for the decreasing rate of ETO under recent climate change. On seasonal basis estimation, decreasing trends of relative humidity, wind speed and sun shine hours in Khulna district, and decreasing trends of wind speed and sun shine hours in Rajshahi district played the dominant roles for the decreasing rate of ETO under changing climatic condition. Changes in ETO were most strongly correlated with sun shine hours and most weakly with minimum temperature for both Khulna and Rajshahi. Wind speed was most strongly correlated with ETO for Dry/Rabi season. The findings of this study would be useful for agricultural water management of Bangladesh. \u0000Environ. Sci. & Natural Resources, 13(1&2): 1-12, 2020","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90078141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-06DOI: 10.3329/jesnr.v13i1-2.60686
M. Hoque, Ma Islam, Mz Islam, M. Rahman, B. Biswas
The effect of continuous light and complete dark period on seed germination to first leaf emergence was examined in BRRIdhan71 and BRRIdhan81 in controlled environment at 22 ± 2 ᵒC and 82± 2 % of relative humidity, with or without supplemental LED white light. In the dark, BRRIdhan71 had a germination rate of 97 percent and BRRIdhan81 had a germination rate of 57 percent. Germination was 92 percent in BRRIdhan81 and 77 percent in BRRIdhan71 under photoblastic conditions (Light). The dark and light treatments had a noticeable impact on the percentage of seeds that germinated. Coleoptile was longer in dark than light in BRRIdhan71. In both rice varieties, the light and dark treatments had little effect on the first leaf length, although the first leaf breadth increased noticeably in BRRIdhan81. The growth condition had an impact on root length, seedling fresh weight, and dry weight. Germination percent, coleoptile length, prophyll length, first leaf length, and root length all decreased in BRRIdhan71, whereas germination percent, first leaf length, first leaf breadth, seedling freash, and dry weight all increased significantly in BRRIdhan81.The findings imply that BRRIdhan71 and BRRIdhan81, in particular, responded to photoblastic treatment and predominantly possess photoblastic biocomponents in seed, which affect germination and subsequent growth phases. Rice seed during germinate in the field will light stress if photoblastism is not considered during the development and release of rice varieties for different seasons, such as Aman and Boro, because light affects seeding photomorphogenesis differently in different growth environments. Environ. Sci. & Natural Resources, 13(1&2): 43-49, 2020
{"title":"Effect of Photoblastism on Rice Morphogenesis and Seedling Development","authors":"M. Hoque, Ma Islam, Mz Islam, M. Rahman, B. Biswas","doi":"10.3329/jesnr.v13i1-2.60686","DOIUrl":"https://doi.org/10.3329/jesnr.v13i1-2.60686","url":null,"abstract":"The effect of continuous light and complete dark period on seed germination to first leaf emergence was examined in BRRIdhan71 and BRRIdhan81 in controlled environment at 22 ± 2 ᵒC and 82± 2 % of relative humidity, with or without supplemental LED white light. In the dark, BRRIdhan71 had a germination rate of 97 percent and BRRIdhan81 had a germination rate of 57 percent. Germination was 92 percent in BRRIdhan81 and 77 percent in BRRIdhan71 under photoblastic conditions (Light). The dark and light treatments had a noticeable impact on the percentage of seeds that germinated. Coleoptile was longer in dark than light in BRRIdhan71. In both rice varieties, the light and dark treatments had little effect on the first leaf length, although the first leaf breadth increased noticeably in BRRIdhan81. The growth condition had an impact on root length, seedling fresh weight, and dry weight. Germination percent, coleoptile length, prophyll length, first leaf length, and root length all decreased in BRRIdhan71, whereas germination percent, first leaf length, first leaf breadth, seedling freash, and dry weight all increased significantly in BRRIdhan81.The findings imply that BRRIdhan71 and BRRIdhan81, in particular, responded to photoblastic treatment and predominantly possess photoblastic biocomponents in seed, which affect germination and subsequent growth phases. Rice seed during germinate in the field will light stress if photoblastism is not considered during the development and release of rice varieties for different seasons, such as Aman and Boro, because light affects seeding photomorphogenesis differently in different growth environments. \u0000Environ. Sci. & Natural Resources, 13(1&2): 43-49, 2020","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81923691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-06DOI: 10.3329/jesnr.v13i1-2.60692
M. Ahammed, HI Murtuza, A. Rahman, MS Islam, R. Saiem
The study was conducted to explore the physicochemical parameters of surface water from the construction work involving the bridge over the river Kohelia and road along the bank of Kohelia for the construction of access road for Matarbari Coal Fired Power Plant is under construction area of Bangladesh starting from September 2020 to September 2021. The surface water samples were collected from three sampling stations in the Kohelia for the construction of access road for Matarbari. The result of the study showed that pH, Temperature (T), Dissolved Oxygen (DO), Total Suspended Solids (TSS), Turbidity, Electric Conductivity (EC), Total Dissolved Solids (TDS), Total Coliform (TC) and Fecal Coliform (FC) were ranged from 6.6 to 8.2, 24.8 to 31.6ºC, 4.3 to 6.1 mg/L, 4.0 to 15.0 mg/L, 7.4 to 117.0 NTU, 24.3 to 725.0 μS/cm, 200.0 to 2721.0 mg/L, 23.6 to 644.0 N/100 ML and 11.0 to 312.0 N/100 ML respectively. Some parameters showed no significant change with the time period. This might happen due to periodic changes per day or month due to tidal effects as the study area of Kohelia River is very close estuary of the Bay of Bengal. Except pH and Temperature (T), all others physicochemical parameters were across the acceptable range of standard limits. The Comparative study showed Total and Fecal coliform is higher than the Standard might be happen due to piling slurry, concrete debris, wastewater, unhygienic sanitary waste, soil & silt dumping, surface runoff, oil and grease littering, solid waste created by workers, encroachment etc. Environ. Sci. & Natural Resources, 13(1&2): 76-81, 2020
{"title":"Assessment of Water Quality Parameters of The Kohelia River at Cox’s Bazar of Bangladesh","authors":"M. Ahammed, HI Murtuza, A. Rahman, MS Islam, R. Saiem","doi":"10.3329/jesnr.v13i1-2.60692","DOIUrl":"https://doi.org/10.3329/jesnr.v13i1-2.60692","url":null,"abstract":"The study was conducted to explore the physicochemical parameters of surface water from the construction work involving the bridge over the river Kohelia and road along the bank of Kohelia for the construction of access road for Matarbari Coal Fired Power Plant is under construction area of Bangladesh starting from September 2020 to September 2021. The surface water samples were collected from three sampling stations in the Kohelia for the construction of access road for Matarbari. The result of the study showed that pH, Temperature (T), Dissolved Oxygen (DO), Total Suspended Solids (TSS), Turbidity, Electric Conductivity (EC), Total Dissolved Solids (TDS), Total Coliform (TC) and Fecal Coliform (FC) were ranged from 6.6 to 8.2, 24.8 to 31.6ºC, 4.3 to 6.1 mg/L, 4.0 to 15.0 mg/L, 7.4 to 117.0 NTU, 24.3 to 725.0 μS/cm, 200.0 to 2721.0 mg/L, 23.6 to 644.0 N/100 ML and 11.0 to 312.0 N/100 ML respectively. Some parameters showed no significant change with the time period. This might happen due to periodic changes per day or month due to tidal effects as the study area of Kohelia River is very close estuary of the Bay of Bengal. Except pH and Temperature (T), all others physicochemical parameters were across the acceptable range of standard limits. The Comparative study showed Total and Fecal coliform is higher than the Standard might be happen due to piling slurry, concrete debris, wastewater, unhygienic sanitary waste, soil & silt dumping, surface runoff, oil and grease littering, solid waste created by workers, encroachment etc. \u0000Environ. Sci. & Natural Resources, 13(1&2): 76-81, 2020","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"186 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86917164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-06DOI: 10.3329/jesnr.v13i1-2.60684
S. Afrin, M. Farukh, M. Uddin, M. Rahman
Mymensingh, one of Bangladesh's most densely populated and urbanized cities, could not avoid a noise-related problem that has now turned out into a severe environmental issue. It is indispensable to assess the current noise propagation scenario and its repercussions for urban planners to manage the noise problem. This research endeavours to construct noise pollution indices viz. noise levels (L10, L50, L90), noise climate (NC), equivalent continuous noise level (Leq), noise pollution level (Lnp), and noise exposure index (NEI) were computed for two important particular locations, namely Kanchijhuli and Townhall moor. It was also observed that most of the time, the noise level exceeded 80 dB, which is beyond the recommended level of silent zone, commercial zone and traffic zone according to the DoE (1997). The indices indicated that the noise level of the study area surpassed the normal noise level in all indices. NC, Leq and Lnp were estimated to have a maximum value of 17.32 dB, 94.29 dB and 110.30 dB, respectively, while the minimum value of the study area were 10.71 dB, 82.07 dB and 95.5 dB, respectively. Therefore, it can be stated from the assessment that both Kanchijhuli and Townhall moor are under alarming noise pollution conditions. This research may aid in taking necessary measures to cut off the noise propagation and subsequent noise pollution control for the urban planners and related authorities. Environ. Sci. & Natural Resources, 13(1&2): 19-24, 2020
{"title":"Assessment of Noise Exposure Indices at Kanchijhuli and Townhall Moor in Mymensingh City","authors":"S. Afrin, M. Farukh, M. Uddin, M. Rahman","doi":"10.3329/jesnr.v13i1-2.60684","DOIUrl":"https://doi.org/10.3329/jesnr.v13i1-2.60684","url":null,"abstract":"Mymensingh, one of Bangladesh's most densely populated and urbanized cities, could not avoid a noise-related problem that has now turned out into a severe environmental issue. It is indispensable to assess the current noise propagation scenario and its repercussions for urban planners to manage the noise problem. This research endeavours to construct noise pollution indices viz. noise levels (L10, L50, L90), noise climate (NC), equivalent continuous noise level (Leq), noise pollution level (Lnp), and noise exposure index (NEI) were computed for two important particular locations, namely Kanchijhuli and Townhall moor. It was also observed that most of the time, the noise level exceeded 80 dB, which is beyond the recommended level of silent zone, commercial zone and traffic zone according to the DoE (1997). The indices indicated that the noise level of the study area surpassed the normal noise level in all indices. NC, Leq and Lnp were estimated to have a maximum value of 17.32 dB, 94.29 dB and 110.30 dB, respectively, while the minimum value of the study area were 10.71 dB, 82.07 dB and 95.5 dB, respectively. Therefore, it can be stated from the assessment that both Kanchijhuli and Townhall moor are under alarming noise pollution conditions. This research may aid in taking necessary measures to cut off the noise propagation and subsequent noise pollution control for the urban planners and related authorities. \u0000Environ. Sci. & Natural Resources, 13(1&2): 19-24, 2020","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"194 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74481557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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