Pub Date : 2019-10-01DOI: 10.3329/jesnr.v11i1-2.43387
R. Afrin, F. Hossain, S. Mamun
Drought is an extended period when a region notes a deficiency in its water supply. The Standardized Precipitation Index (SPI) method was used in this study to analyze drought. Northern region of Bangladesh was the area of study. Monthly rainfall data of northern region of Bangladesh was obtained from the Meteorological Department of Bangladesh. Obtained rainfall data was from 1991 to 2011 and values from 2012 to 2026 were generated using Markov model. Then SPI values from 1991 to 2026 were calculated by using SPI formula for analyzing drought. Analysis with SPI method showed that droughts in northern region of Bangladesh varied from moderately dry to severely dry conditions and it may vary from moderately dry to severely dry conditions normally in future but in some cases extreme drought may also take place. From the study, it is observed that the northern region of Bangladesh has already experienced severe drought in 1991, 1992, 1994, 1995, 1997, 1998, 2000, 2003, 2005, 2007, 2009 and 2010. The region may experience severe drought in 2012, 2015, 2016, 2018, 2019, 2021, 2022, 2023, 2024, 2025 and 2026 and extreme drought in 2012, 2014, 2016, 2023 and 2024. J. Environ. Sci. & Natural Resources, 11(1-2): 199-216 2018
{"title":"Analysis of Drought in the Northern Region of Bangladesh Using Standardized Precipitation Index (SPI)","authors":"R. Afrin, F. Hossain, S. Mamun","doi":"10.3329/jesnr.v11i1-2.43387","DOIUrl":"https://doi.org/10.3329/jesnr.v11i1-2.43387","url":null,"abstract":"Drought is an extended period when a region notes a deficiency in its water supply. The Standardized Precipitation Index (SPI) method was used in this study to analyze drought. Northern region of Bangladesh was the area of study. Monthly rainfall data of northern region of Bangladesh was obtained from the Meteorological Department of Bangladesh. Obtained rainfall data was from 1991 to 2011 and values from 2012 to 2026 were generated using Markov model. Then SPI values from 1991 to 2026 were calculated by using SPI formula for analyzing drought. Analysis with SPI method showed that droughts in northern region of Bangladesh varied from moderately dry to severely dry conditions and it may vary from moderately dry to severely dry conditions normally in future but in some cases extreme drought may also take place. From the study, it is observed that the northern region of Bangladesh has already experienced severe drought in 1991, 1992, 1994, 1995, 1997, 1998, 2000, 2003, 2005, 2007, 2009 and 2010. The region may experience severe drought in 2012, 2015, 2016, 2018, 2019, 2021, 2022, 2023, 2024, 2025 and 2026 and extreme drought in 2012, 2014, 2016, 2023 and 2024. \u0000J. Environ. Sci. & Natural Resources, 11(1-2): 199-216 2018","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82771363","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 : 2019-10-01DOI: 10.3329/jesnr.v11i1-2.43385
M. Haque, M. G. Aziz, M. Mortuza, Ma Rahman
The effects of ethephon on acceleration of ripening as well as differentiation of quality and juice yield of tomato fruit were evaluated. Three groups of ethophon namely Ripen-15 (50% ethephon), Lpen-25 (48% ethephon) and Fast-25 (40% ethephon) along with control solution were applied on mature and uniform shaped tomato at three concentrations (10 ppm, 100 ppm, 1000 ppm). Physical and chemical attributes such as color, firmness, total weight loss, total soluble solids (TSS), vitamin C content, pulp smoothness and juice yield were studied from 3rd to 13th day of application of ethephon. The fastest yield of tomato juice was obtained from 100 ppm as compared to the slowest at 1000 ppm. The highest and lowest juice yield were found by application of Lpen-25 and Fast-25 respectively at 1000 ppm Thus, we concluded that ethephon application on tomato at an appropriate level may accelerate the ripening of tomato fruit and increase the yield of tomato juice. J. Environ. Sci. & Natural Resources, 11(1-2): 183-189 2018
{"title":"Yield and Quality of Tomato Juice as Affected by Ripening Agents","authors":"M. Haque, M. G. Aziz, M. Mortuza, Ma Rahman","doi":"10.3329/jesnr.v11i1-2.43385","DOIUrl":"https://doi.org/10.3329/jesnr.v11i1-2.43385","url":null,"abstract":"The effects of ethephon on acceleration of ripening as well as differentiation of quality and juice yield of tomato fruit were evaluated. Three groups of ethophon namely Ripen-15 (50% ethephon), Lpen-25 (48% ethephon) and Fast-25 (40% ethephon) along with control solution were applied on mature and uniform shaped tomato at three concentrations (10 ppm, 100 ppm, 1000 ppm). Physical and chemical attributes such as color, firmness, total weight loss, total soluble solids (TSS), vitamin C content, pulp smoothness and juice yield were studied from 3rd to 13th day of application of ethephon. The fastest yield of tomato juice was obtained from 100 ppm as compared to the slowest at 1000 ppm. The highest and lowest juice yield were found by application of Lpen-25 and Fast-25 respectively at 1000 ppm Thus, we concluded that ethephon application on tomato at an appropriate level may accelerate the ripening of tomato fruit and increase the yield of tomato juice. \u0000J. Environ. Sci. & Natural Resources, 11(1-2): 183-189 2018","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78890867","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 : 2019-10-01DOI: 10.3329/jesnr.v11i1-2.43391
M. Momtaz, K. Yeasmin, Khatun, M. Ahmad
The present study was carried out to find out the impact of plant spacing on population dynamics of sucking pest of cotton from June 2018 to February 2019. The main objectives of the study are to observe the population dynamics of jassid and whitefly under different plant population. The experiment was laid out in RCB design with three replications and five differents treatments viz.,T1- 90x45 cm T2 – 90x40 cm, T3- 90x35 cm, T4- 90x30 cm, T5 – 90X25 cm. The results revealed that peak population of jassid was recorded in last July to October and whitefly from august to October. Plant spacing showed a significant effect on the jassid population. It is clear from the results that maximum population of jassid (32.4), aphids (11.3) and whitefly (18.1) were recorded to be per leaf from those plots where minimum plant spacing (25 cm) was maintained. No of sucking insects were increasing with decreasing plant population. J. Environ. Sci. & Natural Resources, 11(1-2): 241-243 2018
{"title":"Impact of Plant Spacing on Population Dynamics of Sucking Pest of Cotton","authors":"M. Momtaz, K. Yeasmin, Khatun, M. Ahmad","doi":"10.3329/jesnr.v11i1-2.43391","DOIUrl":"https://doi.org/10.3329/jesnr.v11i1-2.43391","url":null,"abstract":"The present study was carried out to find out the impact of plant spacing on population dynamics of sucking pest of cotton from June 2018 to February 2019. The main objectives of the study are to observe the population dynamics of jassid and whitefly under different plant population. The experiment was laid out in RCB design with three replications and five differents treatments viz.,T1- 90x45 cm T2 – 90x40 cm, T3- 90x35 cm, T4- 90x30 cm, T5 – 90X25 cm. The results revealed that peak population of jassid was recorded in last July to October and whitefly from august to October. Plant spacing showed a significant effect on the jassid population. It is clear from the results that maximum population of jassid (32.4), aphids (11.3) and whitefly (18.1) were recorded to be per leaf from those plots where minimum plant spacing (25 cm) was maintained. No of sucking insects were increasing with decreasing plant population. \u0000J. Environ. Sci. & Natural Resources, 11(1-2): 241-243 2018","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88904469","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 : 2019-10-01DOI: 10.3329/jesnr.v11i1-2.43374
M. I. Hossain, F. H. Shikha, Aditya Sharma
The study was carried out on the present status of shrimp processing plant’s waste management in Bangladesh. A detailed survey was conducted during February to May, 2013 in order to collect some basic information on the present status of shrimp waste management at shrimp processing plants through questionnaire interview on the various parameters. Information was collected from 52 plants of Khulna, Chittagong and Cox`s bazaar region. All collected information were accumulated, analyzed and are presented in graphs, figures and tables. The study had revealed that about 671.84MT of shrimp was purchased in 52 plants in a day and from which 248.8 MT of waste product was produced during processing. The study results showed that about 80% of the plants sell their waste products and rest of the plants discharged their wastes into river (63.50%) and 91.42% of the plants treated the waste water before discharge. Based on the obtained results from this study, it could be suggested that shrimp waste can be used further in different ecofriendly ways. J. Environ. Sci. & Natural Resources, 11(1-2): 73-81 2018
{"title":"Waste Management Status of Shrimp Processing Plants of South and South- West Region of Bangladesh","authors":"M. I. Hossain, F. H. Shikha, Aditya Sharma","doi":"10.3329/jesnr.v11i1-2.43374","DOIUrl":"https://doi.org/10.3329/jesnr.v11i1-2.43374","url":null,"abstract":"The study was carried out on the present status of shrimp processing plant’s waste management in Bangladesh. A detailed survey was conducted during February to May, 2013 in order to collect some basic information on the present status of shrimp waste management at shrimp processing plants through questionnaire interview on the various parameters. Information was collected from 52 plants of Khulna, Chittagong and Cox`s bazaar region. All collected information were accumulated, analyzed and are presented in graphs, figures and tables. The study had revealed that about 671.84MT of shrimp was purchased in 52 plants in a day and from which 248.8 MT of waste product was produced during processing. The study results showed that about 80% of the plants sell their waste products and rest of the plants discharged their wastes into river (63.50%) and 91.42% of the plants treated the waste water before discharge. Based on the obtained results from this study, it could be suggested that shrimp waste can be used further in different ecofriendly ways. \u0000J. Environ. Sci. & Natural Resources, 11(1-2): 73-81 2018","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89672156","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 : 2019-10-01DOI: 10.3329/jesnr.v11i1-2.43375
A. Khan, R. Rahman, H. Kabir
Mushroom is getting very popular in Bangladesh with serving notable nutritional components to the consumers. Nutritional components have been explored but yet not explored the socio-economic values and related factors affecting to the it cultivations. Thus, the major attempt of the present study was to assess the profitability and the factors affecting the production of mushroom (Oyster mushroom). Primary data were collected from 50 mushroom farmers of the selected four areas of Savar Upazila under Dhaka district. The area was purposively selected considering the concentration of different mushroom farmers. From the view point of Gross Margin and net return, mushroom is a profitable business that found in the study area. Gross cost, gross returns and undiscounted BCR per year of mushroom production per season was Tk. 284009.62, Tk. 463954.80 and 1.63 respectively. The Cobb-Douglas function was applied for analyzing the functional effect on mushroom production. The functional analysis indicated that per year gross returns were significantly influenced by the level of education, use of human labor and number of spawn (seed) packets of the farmers. J. Environ. Sci. & Natural Resources, 11(1-2): 83-86 2018
{"title":"Profitability and Factors Affecting the Mushroom Production in Savar Upazila of Dhaka","authors":"A. Khan, R. Rahman, H. Kabir","doi":"10.3329/jesnr.v11i1-2.43375","DOIUrl":"https://doi.org/10.3329/jesnr.v11i1-2.43375","url":null,"abstract":"Mushroom is getting very popular in Bangladesh with serving notable nutritional components to the consumers. Nutritional components have been explored but yet not explored the socio-economic values and related factors affecting to the it cultivations. Thus, the major attempt of the present study was to assess the profitability and the factors affecting the production of mushroom (Oyster mushroom). Primary data were collected from 50 mushroom farmers of the selected four areas of Savar Upazila under Dhaka district. The area was purposively selected considering the concentration of different mushroom farmers. From the view point of Gross Margin and net return, mushroom is a profitable business that found in the study area. Gross cost, gross returns and undiscounted BCR per year of mushroom production per season was Tk. 284009.62, Tk. 463954.80 and 1.63 respectively. The Cobb-Douglas function was applied for analyzing the functional effect on mushroom production. The functional analysis indicated that per year gross returns were significantly influenced by the level of education, use of human labor and number of spawn (seed) packets of the farmers. \u0000J. Environ. Sci. & Natural Resources, 11(1-2): 83-86 2018","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"48 28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79547072","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 : 2019-10-01DOI: 10.3329/jesnr.v11i1-2.43388
Mohammad Mustafizur Rahman, M. Pramanik, M. Islam, S. Razia
Mangroves have been planting in the coastal belt of Bangladesh to protect the inhabitants of the coastal areas from cyclones and storm surges. Nijhum Dwip is located at the southern part of Hatiya Island. Most part of the island has been planted with the mangroves in the 1970s and 1980s; while parts of the mangroves have been deforested during the past few decades. The objectives of this research were to delineate and quantify the changes in the extent of mangroves in the island. The Landsat data of 1989, 2001, 2010 and 2018 have been utilized in the study. Three major land covers, namely forest, water and other land have been interpreted and delineated by using on-screen digitizing. The quantity of mangrove forest loss in the island is estimated as 1,024 ha, while 395 ha were afforested during 1989-2018. In the decadal change analysis, it was revealed that net forest cover change was higher in 2000s compared to other two decades and it was -425 ha. The result of the study is helpful to understand the extent and pattern of forest conversion in the island and to halt further forest loss and conserve the remaining forest. J. Environ. Sci. & Natural Resources, 11(1-2): 217-225 2018
{"title":"Mapping Mangrove Forest Change in Nijhum Dwip Island","authors":"Mohammad Mustafizur Rahman, M. Pramanik, M. Islam, S. Razia","doi":"10.3329/jesnr.v11i1-2.43388","DOIUrl":"https://doi.org/10.3329/jesnr.v11i1-2.43388","url":null,"abstract":"Mangroves have been planting in the coastal belt of Bangladesh to protect the inhabitants of the coastal areas from cyclones and storm surges. Nijhum Dwip is located at the southern part of Hatiya Island. Most part of the island has been planted with the mangroves in the 1970s and 1980s; while parts of the mangroves have been deforested during the past few decades. The objectives of this research were to delineate and quantify the changes in the extent of mangroves in the island. The Landsat data of 1989, 2001, 2010 and 2018 have been utilized in the study. Three major land covers, namely forest, water and other land have been interpreted and delineated by using on-screen digitizing. The quantity of mangrove forest loss in the island is estimated as 1,024 ha, while 395 ha were afforested during 1989-2018. In the decadal change analysis, it was revealed that net forest cover change was higher in 2000s compared to other two decades and it was -425 ha. The result of the study is helpful to understand the extent and pattern of forest conversion in the island and to halt further forest loss and conserve the remaining forest. \u0000J. Environ. Sci. & Natural Resources, 11(1-2): 217-225 2018","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"5 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72594905","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 : 2019-10-01DOI: 10.3329/jesnr.v11i1-2.43377
M. Hossain, F. Shikha, T. Chakrabarty
The present study was conducted to investigate existing culture conditions of pangus (Pangasius hypophthalmus) at farms in Trishal Upazila under Mymensingh district during January to June, 2016. Data were collected with questionnaire by personal interviewing of the respondents. The study result showed that- the farmers of large category are about 60% where 47% farmers have leased pond. Most of the farmer use deep tube-well water as source, 87% farmers practice monoculture of pangus and monitored the health of fish in a regular basis. Only 13% farmer reported diseases occurred in their pond. Most of the pangus farmers used homemade or local farm made supplementary feeds for pangus culture. The study showed that development of better farming system, improving water management, stocking of quality fingerlings, health monitoring and use of prime and standard quality feed has resulted better pangus production in Trishal area. J. Environ. Sci. & Natural Resources, 11(1-2): 97-107 2018
{"title":"Studies on the Culture Condition of Pangus (Pangasius hypophthalmus) at Different Farms in Trishal Upazila","authors":"M. Hossain, F. Shikha, T. Chakrabarty","doi":"10.3329/jesnr.v11i1-2.43377","DOIUrl":"https://doi.org/10.3329/jesnr.v11i1-2.43377","url":null,"abstract":"The present study was conducted to investigate existing culture conditions of pangus (Pangasius hypophthalmus) at farms in Trishal Upazila under Mymensingh district during January to June, 2016. Data were collected with questionnaire by personal interviewing of the respondents. The study result showed that- the farmers of large category are about 60% where 47% farmers have leased pond. Most of the farmer use deep tube-well water as source, 87% farmers practice monoculture of pangus and monitored the health of fish in a regular basis. Only 13% farmer reported diseases occurred in their pond. Most of the pangus farmers used homemade or local farm made supplementary feeds for pangus culture. The study showed that development of better farming system, improving water management, stocking of quality fingerlings, health monitoring and use of prime and standard quality feed has resulted better pangus production in Trishal area. \u0000J. Environ. Sci. & Natural Resources, 11(1-2): 97-107 2018","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89752242","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 : 2019-10-01DOI: 10.3329/jesnr.v11i1-2.43390
M. A. Mou, R. Khatun, M. Farukh
The study was conducted to investigate the physico-chemical parameters and heavy metals content of water in some selected hatcheries at Shambhuganj, Mymensingh. The water samples were collected from seven selected hatcheries during March to April 2019 to examine temperature, EC, TDS, DO, BOD, pH, ammonia, NO3 -, PO4 2- and heavy metals (Cr, Cd, Pb and Ni). The values of temperature, pH, DO, BOD, EC, TDS and ammonia were 28.5 °C, 7.9 to 8.4, 6.8 to 7.8 mg L-1, 0.1 to 0.9 mg L-1, 231.5 to 307.2 μS cm-1, 146 to 200 mg L-1 and 0.04 to o.06 mg L-1, respectively in the studied hatcheries. The NO3 - and PO4 2- content ranged from 0.48 to 0.68 mg L-1 and 0.45 to 0.63 mg L-1, respectively. Among the heavy metals, Pb was found in 5 hatcheries but the values were within the permissible limit. Other heavy metals (Cr, Cd and Ni) were not found in the studied hatcheries. The fish production of the selected hatcheries ranged from 4 to 9 metric ton. The study results revealed that all of the investigated parameters were within the permissible limit and water quality of selected hatcheries was suitable for fish culture. J. Environ. Sci. & Natural Resources, 11(1-2): 235-240 2018
{"title":"Water Quality Assessment of Some Selected Hatcheries at Shambhuganj Mymensingh","authors":"M. A. Mou, R. Khatun, M. Farukh","doi":"10.3329/jesnr.v11i1-2.43390","DOIUrl":"https://doi.org/10.3329/jesnr.v11i1-2.43390","url":null,"abstract":"The study was conducted to investigate the physico-chemical parameters and heavy metals content of water in some selected hatcheries at Shambhuganj, Mymensingh. The water samples were collected from seven selected hatcheries during March to April 2019 to examine temperature, EC, TDS, DO, BOD, pH, ammonia, NO3 -, PO4 2- and heavy metals (Cr, Cd, Pb and Ni). The values of temperature, pH, DO, BOD, EC, TDS and ammonia were 28.5 °C, 7.9 to 8.4, 6.8 to 7.8 mg L-1, 0.1 to 0.9 mg L-1, 231.5 to 307.2 μS cm-1, 146 to 200 mg L-1 and 0.04 to o.06 mg L-1, respectively in the studied hatcheries. The NO3 - and PO4 2- content ranged from 0.48 to 0.68 mg L-1 and 0.45 to 0.63 mg L-1, respectively. Among the heavy metals, Pb was found in 5 hatcheries but the values were within the permissible limit. Other heavy metals (Cr, Cd and Ni) were not found in the studied hatcheries. The fish production of the selected hatcheries ranged from 4 to 9 metric ton. The study results revealed that all of the investigated parameters were within the permissible limit and water quality of selected hatcheries was suitable for fish culture. \u0000J. Environ. Sci. & Natural Resources, 11(1-2): 235-240 2018","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"86 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86166082","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 : 2019-10-01DOI: 10.3329/jesnr.v11i1-2.43382
M. M. Hoque, S. Islam
In this study solid waste were collected from 09 waste generating points of Mawlana Bhashani Science and Technology University during the study for composting. Volume reduction rate of solid waste was quick throughout 5-20 days and became slower during 25-35 days and finally became constant for last 10 days of observation, which indicated that quantity of nutrient materials for the bacterial growth became depleted and consequently the rate of decomposition of organic waste maybe slower at the last 10 days of observation. During the initial days, the increased temperature in the composting barrel was mainly caused by the more exothermic reactions associated with the respiratory metabolism of the microorganism involved in the composting of wastes. Volume reduction of organic wastes and the moisture contents shows similar trend. This result indicates that bacterial activities decrease with the reduction of moisture content of the wastes in the composting barrel. J. Environ. Sci. & Natural Resources, 11(1-2): 153-157 2018
{"title":"Temporal Changes of Physical Parameters of Solid Waste During Barrel Composting","authors":"M. M. Hoque, S. Islam","doi":"10.3329/jesnr.v11i1-2.43382","DOIUrl":"https://doi.org/10.3329/jesnr.v11i1-2.43382","url":null,"abstract":"In this study solid waste were collected from 09 waste generating points of Mawlana Bhashani Science and Technology University during the study for composting. Volume reduction rate of solid waste was quick throughout 5-20 days and became slower during 25-35 days and finally became constant for last 10 days of observation, which indicated that quantity of nutrient materials for the bacterial growth became depleted and consequently the rate of decomposition of organic waste maybe slower at the last 10 days of observation. During the initial days, the increased temperature in the composting barrel was mainly caused by the more exothermic reactions associated with the respiratory metabolism of the microorganism involved in the composting of wastes. Volume reduction of organic wastes and the moisture contents shows similar trend. This result indicates that bacterial activities decrease with the reduction of moisture content of the wastes in the composting barrel. \u0000J. Environ. Sci. & Natural Resources, 11(1-2): 153-157 2018","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"108 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85472399","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 : 2019-10-01DOI: 10.3329/jesnr.v11i1-2.43381
M.K. Hossain, M. Rahman, S. Hoque
Water samples were collected from the Rupsha river of Khulna region to determine ionic contamination for irrigation purpose. The chemical analyses included pH, EC, TDS and ions. pH values of water samples were slightly alkaline in nature. Samples were rated as fresh water based on TDS values. Samples were high salinity and low alkalinity hazards expressing C3S1. Regarding SAR and SSP values, samples were excellent and good classes, respectively. Samples were free from RSC and were very hard class. Regarding PI values, samples were under class-II implying 75% maximum soil permeability. Ca, Mg, Na, Cu, Ni, Zn, HCO3, SO4 and PO4 levels in samples were within safe limit. Cd, Cr and Cl ions in water samples were above the permissible limit and were treated as water contaminants for irrigation. From the present findings, it is noted that the detected ions as water contaminants should be considered for irrigation usage toward food safety. J. Environ. Sci. & Natural Resources, 11(1-2): 145-151 2018
{"title":"Quantitative Assessment of Water Contaminants in the Rupsha River of Khulna Region for Irrigation Usage","authors":"M.K. Hossain, M. Rahman, S. Hoque","doi":"10.3329/jesnr.v11i1-2.43381","DOIUrl":"https://doi.org/10.3329/jesnr.v11i1-2.43381","url":null,"abstract":"Water samples were collected from the Rupsha river of Khulna region to determine ionic contamination for irrigation purpose. The chemical analyses included pH, EC, TDS and ions. pH values of water samples were slightly alkaline in nature. Samples were rated as fresh water based on TDS values. Samples were high salinity and low alkalinity hazards expressing C3S1. Regarding SAR and SSP values, samples were excellent and good classes, respectively. Samples were free from RSC and were very hard class. Regarding PI values, samples were under class-II implying 75% maximum soil permeability. Ca, Mg, Na, Cu, Ni, Zn, HCO3, SO4 and PO4 levels in samples were within safe limit. Cd, Cr and Cl ions in water samples were above the permissible limit and were treated as water contaminants for irrigation. From the present findings, it is noted that the detected ions as water contaminants should be considered for irrigation usage toward food safety. \u0000J. Environ. Sci. & Natural Resources, 11(1-2): 145-151 2018","PeriodicalId":15768,"journal":{"name":"Journal of Environmental Science and Natural Resources","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73280669","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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