The change of Banjarbaru city status into the central government of South Kalimantan Province, has the potential to increase the need for land. This directly affects wetlands conversion activities into other forms of land closure. This research aims to map the spatial distribution of wetlands, and the spatial distribution of wetlands conversion existing in Banjarbaru City in every decade over the last four decades, ie from the 1970s to the present. Wetlands spatial data are extracted from multitemporal satellite imagery, Landsat 5 in 1973, Landsat 5 in 1989, Landsat 5 in 1997, Landsat 5 in 2007, and Landsat 8 in 2016. The method used to extract wetlands is Object Based Image Analysis (OBIA), with Full Lambda-Schedule algorithm. The research results show that over the past last decades, the total area of Banjarbaru City's wetlands has been reduced continuously. The average total reduction rate is 534.53 hectares per decade or about 53.5 hectares per year, with a linear pattern over the past four decades.
{"title":"The Face of the Banjarbaru City Wetlands in Last Four Decades","authors":"Syam’ani Syam’ani, A. Fithria, E. Prihatiningtyas","doi":"10.20527/JWEM.V6I2.183","DOIUrl":"https://doi.org/10.20527/JWEM.V6I2.183","url":null,"abstract":"The change of Banjarbaru city status into the central government of South Kalimantan Province, has the potential to increase the need for land. This directly affects wetlands conversion activities into other forms of land closure. This research aims to map the spatial distribution of wetlands, and the spatial distribution of wetlands conversion existing in Banjarbaru City in every decade over the last four decades, ie from the 1970s to the present. Wetlands spatial data are extracted from multitemporal satellite imagery, Landsat 5 in 1973, Landsat 5 in 1989, Landsat 5 in 1997, Landsat 5 in 2007, and Landsat 8 in 2016. The method used to extract wetlands is Object Based Image Analysis (OBIA), with Full Lambda-Schedule algorithm. The research results show that over the past last decades, the total area of Banjarbaru City's wetlands has been reduced continuously. The average total reduction rate is 534.53 hectares per decade or about 53.5 hectares per year, with a linear pattern over the past four decades.","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78739489","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}
School is one of the spearheads to achieve the function of shaping human character who care about the environment. Schools can implement strategies to instill students' awareness of the environment as early as possible. The learning process in schools is very possible to form and instill the environmental care characters. This study aims to find the students' attitudes and behaviors toward the environmental care, the school strategy in instilling the environmental care, and the constraints faced in embedding environmental care characters. The approach used is a qualitative approach. The data were collected through observation, interviews, and questionnaires. The data obtained were analyzed with the interactive model of analysis from Miles and Huberman. The results of the study indicated the students’ character and behavior of the environmental care were on the very good category (50%) and good (33%), the remaining categories were fair (9%), less good (5%) and poor (3%). The efforts made by schools to enable students to be aware of the environment are: to integrate it to the learning, to model, to habituate, and to insert messages to care to the environment every flag ceremony held on Mondays. The obstacles encountered in embedding the environmental care characteristics are customs in the family and less good model from the parents and people around about the environmental care.
{"title":"Instilling the Environmental Care Characters to the Elementary Schools Located on the River Banks","authors":"R. Adawiah","doi":"10.20527/jwem.v6i2.177","DOIUrl":"https://doi.org/10.20527/jwem.v6i2.177","url":null,"abstract":"School is one of the spearheads to achieve the function of shaping human character who care about the environment. Schools can implement strategies to instill students' awareness of the environment as early as possible. The learning process in schools is very possible to form and instill the environmental care characters. This study aims to find the students' attitudes and behaviors toward the environmental care, the school strategy in instilling the environmental care, and the constraints faced in embedding environmental care characters. The approach used is a qualitative approach. The data were collected through observation, interviews, and questionnaires. The data obtained were analyzed with the interactive model of analysis from Miles and Huberman. The results of the study indicated the students’ character and behavior of the environmental care were on the very good category (50%) and good (33%), the remaining categories were fair (9%), less good (5%) and poor (3%). The efforts made by schools to enable students to be aware of the environment are: to integrate it to the learning, to model, to habituate, and to insert messages to care to the environment every flag ceremony held on Mondays. The obstacles encountered in embedding the environmental care characteristics are customs in the family and less good model from the parents and people around about the environmental care.","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86303522","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}
A goal of timber harvesting is to increase timber production through removing the timber from the forest using some harvesting techniques. A peatland is a fragile ecosystem and may degraded easily. Logging activities may adversely affect the soil compactness that disrupt the peat drainage system as well as cause subsidence, then ultimately may cause the sustainability of peat. This study was focused on examining the effect of timber harvesting acivities in peat forest plantation. The peatland damage may in the form of increased bulk density, water level fluctuations of peat (TMA), subsidence, irreversible and carbon emissions. The objective of the study is to find out the effect of timber harvesting in peatland plantations to peat water fluctuations and subsidence. The results showed that logging activites caused : (1) The average of water table and water level are about 1.03 and 0.967 m; and (2) Subsidence about -8 to -12.5 cm with the average is -11.0 cm.
{"title":"The Effect of Timber Harvesting on Fluctuation of Peat Water Level and Subsidence of Peat-Soil Surface","authors":"S. Suhartana, Yuniawati Yuniawati","doi":"10.20527/JWEM.V6I2.178","DOIUrl":"https://doi.org/10.20527/JWEM.V6I2.178","url":null,"abstract":"A goal of timber harvesting is to increase timber production through removing the timber from the forest using some harvesting techniques. A peatland is a fragile ecosystem and may degraded easily. Logging activities may adversely affect the soil compactness that disrupt the peat drainage system as well as cause subsidence, then ultimately may cause the sustainability of peat. This study was focused on examining the effect of timber harvesting acivities in peat forest plantation. The peatland damage may in the form of increased bulk density, water level fluctuations of peat (TMA), subsidence, irreversible and carbon emissions. The objective of the study is to find out the effect of timber harvesting in peatland plantations to peat water fluctuations and subsidence. The results showed that logging activites caused : (1) The average of water table and water level are about 1.03 and 0.967 m; and (2) Subsidence about -8 to -12.5 cm with the average is -11.0 cm. ","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75145084","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}
Toan Nguyen-Sy, W. Cheng, J. Guigue, S. Kimani, W. Wibowo, K. Tawaraya, Toru Watanabe, Ji Wu, Xingkai Xu
Hot water- and water-extracted organic matter was extracted from soil samples collected after a 31-year long-term experiment which aimed to assess the effect of different fertilization strategies (inorganic fertilizers and organic matters) commonly used for paddy rice cultivation in Yamagata, northeastern Japan. The ratio of soil to extracted water was 2:3. The amounts of hot water-extracted organic carbon and nitrogen (HWEOC and HWEN) at 80 oC and 16 hours, water-extracted organic carbon and nitrogen (WEOC and WEN) at room temperature, and their δ13C and δ15N were measured from the five fertilizer treatment plots as [1) PK, 2) NPK, 3) NPK + 6 Mg ha-1 rice straw (RS), 4) NPK + 10 Mg ha-1 rice straw compost (CM1), and 5) NPK + 30 Mg ha-1 rice straw compost (CM3)], for surface (0-15 cm) and subsurface (15-25 cm) layers. HWEOC and WEOC accounted for an average of about 1.51 and 0.66% of SOC, while HWEN and WEN accounted for an average of about 1.09 and 0.40% of soil TN, respectively. About 90% of the extracted N was organic form
{"title":"Water extractable organic carbon and nitrogen and their stable isotopes from long-term experiment in a Japanese rice paddy","authors":"Toan Nguyen-Sy, W. Cheng, J. Guigue, S. Kimani, W. Wibowo, K. Tawaraya, Toru Watanabe, Ji Wu, Xingkai Xu","doi":"10.20527/JWEM.V6I2.176","DOIUrl":"https://doi.org/10.20527/JWEM.V6I2.176","url":null,"abstract":"<span style=\"color: windowtext; line-height: 200%; font-family: 'Times New Roman','serif'; font-size: 12pt; mso-fareast-font-family: 'ＭＳ 明朝'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;\" lang=\"EN-US\">Hot water- and water-extracted organic matter was extracted from soil samples collected after a 31-year long-term experiment which aimed to assess the effect of different fertilization strategies (inorganic fertilizers and organic matters) commonly used for paddy rice cultivation in Yamagata, northeastern Japan. </span><span style=\"color: windowtext; line-height: 200%; font-family: 'Times New Roman','serif'; font-size: 12pt; mso-fareast-font-family: 'ＭＳ 明朝'; mso-ansi-language: EN-US; mso-fareast-language: JA; mso-bidi-language: AR-SA;\" lang=\"EN-US\">The ratio of soil to </span><span style=\"color: windowtext; line-height: 200%; font-family: 'Times New Roman','serif'; font-size: 12pt; mso-fareast-font-family: 'ＭＳ 明朝'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;\" lang=\"EN-US\">extracted</span><span style=\"color: windowtext; line-height: 200%; font-family: 'Times New Roman','serif'; font-size: 12pt; mso-fareast-font-family: 'ＭＳ 明朝'; mso-ansi-language: EN-US; mso-fareast-language: JA; mso-bidi-language: AR-SA;\" lang=\"EN-US\"> water was 2:3. </span><span style=\"color: windowtext; line-height: 200%; font-family: 'Times New Roman','serif'; font-size: 12pt; mso-fareast-font-family: 'ＭＳ 明朝'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;\" lang=\"EN-US\">The amounts of hot water-extracted organic carbon and nitrogen (HWEOC and HWEN) at 80 <sup>o</sup>C and 16 hours, water-extracted organic carbon and nitrogen (WEOC and WEN) at room temperature, and their δ<sup>13</sup>C and δ<sup>15</sup>N were measured from the five fertilizer treatment plots as [1) PK, 2) NPK, 3) NPK + 6 Mg ha<sup>-1</sup> rice straw (RS), 4) NPK + 10 Mg ha<sup>-1</sup> rice straw compost (CM1), and 5) NPK + 30 Mg ha<sup>-1</sup> rice straw compost (CM3)], for surface (0-15 cm) and subsurface (15-25 cm) layers. HWEOC and WEOC accounted for an average of about 1.5</span><span style=\"color: windowtext; line-height: 200%; font-family: 'Times New Roman','serif'; font-size: 12pt; mso-fareast-font-family: 'ＭＳ 明朝'; mso-ansi-language: EN-US; mso-fareast-language: JA; mso-bidi-language: AR-SA;\" lang=\"EN-US\">1</span><span style=\"color: windowtext; line-height: 200%; font-family: 'Times New Roman','serif'; font-size: 12pt; mso-fareast-font-family: 'ＭＳ 明朝'; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;\" lang=\"EN-US\"> and 0.66% of SOC, while HWEN and WEN accounted for an average of about 1.09 and 0.40% of soil TN, respectively. About 90% of the extracted N was organic form</span><span style=\"color: windowtext; line-height: 200%; font-family: 'Times New Roman','serif'; font-size: 12pt; mso-fareast-font-family: 'ＭＳ 明朝'; mso-ansi-language: EN-US; mso-fareast-language: JA; ","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74414139","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}
M. Imanudin, B. Bakri, M. E. Armanto, B. Setiawan, Ratmini S Np
The main problem for agriculture at tidal lowland swamp is low soil quality and high acidity of soil and high water. The research objective was to investigate how far the effort in increasing tertiary canal network to improve water quality (increasing pH and reducinf iron) in channel and tertiary plot. Field study was conducted at Bandarjaya Village of Jalur 25, Delta Sugihan Kanan, South Sumatra. Field activities were consisted of network investigation land use and farm enterprise system which located at Primr 13 of Sugihan Kiri and Primer 25 of Sugihan Kanan. The network improvement perfomance was conducted by constructing micro water management (installed the tertiary gate and developen quartey canal) at tertiary plot which consisted of collector channel, sub tertiary channel and control plot which was outfall at quarterly channel downstream end. Water gate having goose neck pipe system was constructed to control water table in tertiary channel. Results of field study showed that land use at the study area was still dominated by rice crop with magnitude of 83% and the rest of 17% was used for rubber plantation, orange planation and mix plantation. The depth of phyrite layer was in the range of 60 to 100 cm below soil surface. Water table surface in October was in the range of 10 to 35 cm. Field adaptation showed that water gate was operated in closed condition (water retention) during vegetative phase. Water retention showed significant to improve rice yield in which water table since November had increased from -10 cm to flooding condition of 15 cm in January. This condition provide sufficient water for rice crop which was similar as the result found at irrigation area. The addition of ameliorant substances such as coconut fiber, and sand semen block at outfall of tertiary and kuartely channels also increase water quality in which water pH was increased from 2.95 to 3.7 and iron concentration was decreased from 4.01 to 0.32 mg/liter. Rice yield was increased from average production of 2 ton/ha to 3 ton/ha. This low production was due to land flushing process which need longer time process for at least 2 to 3 years from current condition as well as other production inputs such as fertilization and ameliorant substances.
{"title":"Land And Water Management Option of Tidal Lowland Reclamation Area to Support Rice Production (A Case Study in Delta Sugihan Kanan of South Sumatra Indonesia)","authors":"M. Imanudin, B. Bakri, M. E. Armanto, B. Setiawan, Ratmini S Np","doi":"10.20527/JWEM.V6I2.165","DOIUrl":"https://doi.org/10.20527/JWEM.V6I2.165","url":null,"abstract":"The main problem for agriculture at tidal lowland swamp is low soil quality and high acidity of soil and high water. The research objective was to investigate how far the effort in increasing tertiary canal network to improve water quality (increasing pH and reducinf iron) in channel and tertiary plot. Field study was conducted at Bandarjaya Village of Jalur 25, Delta Sugihan Kanan, South Sumatra. Field activities were consisted of network investigation land use and farm enterprise system which located at Primr 13 of Sugihan Kiri and Primer 25 of Sugihan Kanan. The network improvement perfomance was conducted by constructing micro water management (installed the tertiary gate and developen quartey canal) at tertiary plot which consisted of collector channel, sub tertiary channel and control plot which was outfall at quarterly channel downstream end. Water gate having goose neck pipe system was constructed to control water table in tertiary channel. Results of field study showed that land use at the study area was still dominated by rice crop with magnitude of 83% and the rest of 17% was used for rubber plantation, orange planation and mix plantation. The depth of phyrite layer was in the range of 60 to 100 cm below soil surface. Water table surface in October was in the range of 10 to 35 cm. Field adaptation showed that water gate was operated in closed condition (water retention) during vegetative phase. Water retention showed significant to improve rice yield in which water table since November had increased from -10 cm to flooding condition of 15 cm in January. This condition provide sufficient water for rice crop which was similar as the result found at irrigation area. The addition of ameliorant substances such as coconut fiber, and sand semen block at outfall of tertiary and kuartely channels also increase water quality in which water pH was increased from 2.95 to 3.7 and iron concentration was decreased from 4.01 to 0.32 mg/liter. Rice yield was increased from average production of 2 ton/ha to 3 ton/ha. This low production was due to land flushing process which need longer time process for at least 2 to 3 years from current condition as well as other production inputs such as fertilization and ameliorant substances.","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73711927","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}
The purpose of this study is to determine the Accounting treatment of biological assets based on IAS 41 Agriculture. DSAK-IAI in the process of convergence of PSAK with IFRS states that one of the standards that is still being project remaining work since 2010 is IAS 41. IAS 41 is adopted into PSAK No.69 Agriculture as the Accounting standard that regulates special biological assets that will be effectively applicable on 1 January 2018. The results of this study are expected to provide the description of Accounting treatment based on IAS 41 in more detailed and clear in terms of recognition and presentation and disclosure of biological assets. However, in terms of measurement, IAS 41 will be more difficult to implement because the market price for the plantation industry has not been able to be a benchmark of fair value. This research was a qualitative descriptive research by giving a description of the Accounting treatment of biological assets engaged in oil palm plantation. Data collection techniques used questionnaires sent to the company with 10 (ten) samples of oil palm companies representing Banjarmasin City, Banjarbaru City, Banjar Regency, Tapin Regency and Tanah Laut regency. The data were analyzed by using descriptive analysis and index calculation of implementation conformity to the standard. The results showed that the companies have applied the Accounting treatment of biological assets on the average of 90.8% based on research indicators. In terms of classification the companies have classified 100% of its biological assets well. Recognition, measurement and assessment of biological assets, the companies applied research indicators in the range of 84% - 97%, this condition was caused more because the basis of valuation with the fair value of biological assets was not readily available in the active market thus affecting the recognition, measurement and valuation of those assets. While Presentation and Disclosure of Biological Assets in the financial statements, the companies applied 77.5% - 96% of the existing disclosure indicators.
{"title":"Accounting Treatment of Biological Assets in Plantation Industry on Wetlands (Case Study in Plantation Company Entities in South Kalimantan)","authors":"Chairina Chairina, Sarwani Sarwani","doi":"10.20527/JWEM.V6I2.181","DOIUrl":"https://doi.org/10.20527/JWEM.V6I2.181","url":null,"abstract":"The purpose of this study is to determine the Accounting treatment of biological assets based on IAS 41 Agriculture. DSAK-IAI in the process of convergence of PSAK with IFRS states that one of the standards that is still being project remaining work since 2010 is IAS 41. IAS 41 is adopted into PSAK No.69 Agriculture as the Accounting standard that regulates special biological assets that will be effectively applicable on 1 January 2018. The results of this study are expected to provide the description of Accounting treatment based on IAS 41 in more detailed and clear in terms of recognition and presentation and disclosure of biological assets. However, in terms of measurement, IAS 41 will be more difficult to implement because the market price for the plantation industry has not been able to be a benchmark of fair value. This research was a qualitative descriptive research by giving a description of the Accounting treatment of biological assets engaged in oil palm plantation. Data collection techniques used questionnaires sent to the company with 10 (ten) samples of oil palm companies representing Banjarmasin City, Banjarbaru City, Banjar Regency, Tapin Regency and Tanah Laut regency. The data were analyzed by using descriptive analysis and index calculation of implementation conformity to the standard. The results showed that the companies have applied the Accounting treatment of biological assets on the average of 90.8% based on research indicators. In terms of classification the companies have classified 100% of its biological assets well. Recognition, measurement and assessment of biological assets, the companies applied research indicators in the range of 84% - 97%, this condition was caused more because the basis of valuation with the fair value of biological assets was not readily available in the active market thus affecting the recognition, measurement and valuation of those assets. While Presentation and Disclosure of Biological Assets in the financial statements, the companies applied 77.5% - 96% of the existing disclosure indicators. ","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91218873","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}
This research aimed to analyze dominant type of plankton is consumed by Climbing Perch fish larvae in relation to the abundance of plankton in the waters. The location of this research in waters Danau Bangkau. The field observations were taken by randomly purposive sampling. The results showed that dominant type of plankton eaten by climbing perch larva namely : age 3 to 11 days of taking Coconeis sp, Mougeotia sp, and Mougeotia sp. Age of 11 to 15 days of taking Coconeis sp, Brachionus sp, and Keratella sp. Age of 15-19 days of taking Navicula sp, Diatoma sp, Brachionus sp, and Keratella sp. Age of 19 to 23 days of taking Navicula sp, Brachionus sp, and Keratella sp. Age of 23 to27 days of taking Brachionus sp. and Keratella sp. Age of 27 to 31 days of taking Navicula sp, Brachionus sp, and Keratella sp.
{"title":"The Dominant Type of Planktons Consumed by Climbing Perch Larvae (Anabas Testudineus Bloch) in Danau Bangkau","authors":"R. Rukmini","doi":"10.20527/jwem.v6i1.172","DOIUrl":"https://doi.org/10.20527/jwem.v6i1.172","url":null,"abstract":"<p>This research aimed to analyze dominant type of plankton is consumed by Climbing Perch fish larvae in relation to the abundance of plankton in the waters. The location of this research in waters Danau Bangkau. The field observations were taken by randomly purposive sampling. The results showed that dominant type of plankton eaten by climbing perch larva namely : age 3 to 11 days of taking <em>Coconeis</em> sp,<em> Mougeotia</em> sp, and <em>Mougeotia</em> sp. Age of 11 to 15 days of taking <em>Coconeis </em>sp,<em> Bra</em><em>chionus </em>sp, and <em>Keratella</em> sp. Age of 15-19 days of taking <em>Navicula</em> sp, <em>Diatoma</em> sp, <em>Brachionus</em> sp, and <em>Keratella</em> sp. Age of 19 to 23 days of taking <em>Navicula</em> sp, <em>Brachionus</em> sp, and <em>Keratella</em> sp. Age of 23 to27 days of taking <em>Brachionus</em> sp. and <em>Keratella</em> sp. Age of 27 to 31 days of taking <em>Navicula</em> sp, <em>Brachionus</em> sp, and <em>Keratella</em> sp.</p>","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81577068","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}
Deniel Sang, R. A. Bakar, S. H. Ahmad, K. A. Rahim
A pot study was carried out to investigate the effects of rice husk biochar addition on rice growth performance and fertilizer nitrogen recovery. The biochar effect was studied by using 15N labelled fertilizer urea (10 atom% 15N), as isotopic tracer, until maximum tillering stage (75 days after sowing). Rice husk biochar (RHB) was applied at rates of 0, 5, 10 and 20 Mg ha-1 and laid in randomized complete block design with four replications. The result showed that biochar application significantly improved soil chemical properties (pH, total C, total N, and available P) compared to control treatment. Biochar addition increased number of tiller and root dry matter weight up to 4% and 35%, respectively, compared to un-amended pot. Likewise, application of biochar significantly increased N, P and K uptake by 3%, 19% and 33%, respectively, as compared to the nutrient uptake from the control treatment. Biochar treatment had no significant impact on fertilizer nitrogen recovery in aboveground biomass, in the range of 41% and 42%, in comparison to the control. However, nitrogen fertilizer recovery in soil significantly increased by 47% over the control at application rate of 20 Mg ha-1 RHB. Increased fertilizer N recovery in soil possibly reduced N losses to the environment from volatilization and denitrification processes. Total 15N fertilizer recovery also found increase at highest application of RHB biochar with an increment of 16%. In general, addition of biochar appeared to enhance crop growth performance but its effect on fertilizer N recovery in plant requires further study up to maturity of rice plant.
{"title":"Infuences of Rice Husk Biochar (RHB) on Rice Growth Performance and Fertilizer Nitrogen Recovery up to Maximum Tillering Stage","authors":"Deniel Sang, R. A. Bakar, S. H. Ahmad, K. A. Rahim","doi":"10.20527/JWEM.V6I1.150","DOIUrl":"https://doi.org/10.20527/JWEM.V6I1.150","url":null,"abstract":"A pot study was carried out to investigate the effects of rice husk biochar addition on rice growth performance and fertilizer nitrogen recovery. The biochar effect was studied by using 15N labelled fertilizer urea (10 atom% 15N), as isotopic tracer, until maximum tillering stage (75 days after sowing). Rice husk biochar (RHB) was applied at rates of 0, 5, 10 and 20 Mg ha-1 and laid in randomized complete block design with four replications. The result showed that biochar application significantly improved soil chemical properties (pH, total C, total N, and available P) compared to control treatment. Biochar addition increased number of tiller and root dry matter weight up to 4% and 35%, respectively, compared to un-amended pot. Likewise, application of biochar significantly increased N, P and K uptake by 3%, 19% and 33%, respectively, as compared to the nutrient uptake from the control treatment. Biochar treatment had no significant impact on fertilizer nitrogen recovery in aboveground biomass, in the range of 41% and 42%, in comparison to the control. However, nitrogen fertilizer recovery in soil significantly increased by 47% over the control at application rate of 20 Mg ha-1 RHB. Increased fertilizer N recovery in soil possibly reduced N losses to the environment from volatilization and denitrification processes. Total 15N fertilizer recovery also found increase at highest application of RHB biochar with an increment of 16%. In general, addition of biochar appeared to enhance crop growth performance but its effect on fertilizer N recovery in plant requires further study up to maturity of rice plant.","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"119 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77933875","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}
The discharge of pollutants which is derived from industrial waste, such as oil and gas, palm oil, coal mining, and domestic activities, into the Mahakam river basin may contribute to the declining of water quaity of Mahakam river basin including Lake Jempang in West Kutai Regency. The aim of this study was to identify the condition of plankton and benthos in Lake Jempang, The study was conducted through survey, observation, and measurement of plankton and benthos communities. The results showed that the abundance, diversity, equitability and the dominance indexes of plankton and benthos are still relatively moderate.
{"title":"Biodiversities and Abundanece of Plankton and Benthos in Lake Jempang, West Kutai","authors":"Ghitarina Ghitarina, Deni Udayana, Henny Pagoray","doi":"10.20527/JWEM.V6I1.162","DOIUrl":"https://doi.org/10.20527/JWEM.V6I1.162","url":null,"abstract":"The discharge of pollutants which is derived from industrial waste, such as oil and gas, palm oil, coal mining, and domestic activities, into the Mahakam river basin may contribute to the declining of water quaity of Mahakam river basin including Lake Jempang in West Kutai Regency. The aim of this study was to identify the condition of plankton and benthos in Lake Jempang, The study was conducted through survey, observation, and measurement of plankton and benthos communities. The results showed that the abundance, diversity, equitability and the dominance indexes of plankton and benthos are still relatively moderate. ","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86901184","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}
Silk Sarong Samarinda is a sarong typical samarinda made using imported silk thread from China. Quality mulberry plants are needed to support the cultivation of silkworms (sericulture). Quality mulberry plants are obtained by in vitro propagation techniques. The success of in vitro culture needs to be supported also by the growth medium suitable for acclimatization stage and plantlet growth. As the medium grows peat has several advantages that are light, water-binding power and high air, porous and can create a good environment for the development of plant roots. Acclimatization by using peat media done in glass house. This research uses Completely Randomized Design (RAL) method with 5 (five) kinds of growing media combined with manure, compost and charcoal husk and without fertilization as control. Peat soil media successfully used for the growth of mulberry acclimation. Of the 5 (five) growing media attempted, the best growth of mulberry plants is on peat-growing medium: manure: charcoal husk (1: 1: 1) until 12 weeks after planting (MST) the addition of the number of shoots, the addition of the number of leaves as well as to the growth of plant height where at that height mulberry plants ready to be planted in the field.
{"title":"Adaptation of Murbei Plant of Cultures in Vitro of Peat Soil","authors":"F. Faradilla, S. Alias, A. Rajab","doi":"10.20527/jwem.v6i1.174","DOIUrl":"https://doi.org/10.20527/jwem.v6i1.174","url":null,"abstract":"Silk Sarong Samarinda is a sarong typical samarinda made using imported silk thread from China. Quality mulberry plants are needed to support the cultivation of silkworms (sericulture). Quality mulberry plants are obtained by in vitro propagation techniques. The success of in vitro culture needs to be supported also by the growth medium suitable for acclimatization stage and plantlet growth. As the medium grows peat has several advantages that are light, water-binding power and high air, porous and can create a good environment for the development of plant roots. Acclimatization by using peat media done in glass house. This research uses Completely Randomized Design (RAL) method with 5 (five) kinds of growing media combined with manure, compost and charcoal husk and without fertilization as control. Peat soil media successfully used for the growth of mulberry acclimation. Of the 5 (five) growing media attempted, the best growth of mulberry plants is on peat-growing medium: manure: charcoal husk (1: 1: 1) until 12 weeks after planting (MST) the addition of the number of shoots, the addition of the number of leaves as well as to the growth of plant height where at that height mulberry plants ready to be planted in the field.","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74724980","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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