The existence of the Musi River is very important not only for the population of South Sumatra, but also for the Bengkulu and Lampung regions. The main problem is the high rate of sedimentation, and the alleged increase in heavy metal content. The research aims were to determine the sedimentation rate and metal content in river mud in dry season. Samples of water, mud, and sediments were taken in the waters of Musi Hilir in the area around Kemarau Island in August-September 2018. The results of laboratory analysis showed that the river had been moderately polluted, where the ammonia content in the water was above the quality standard, and the Fe content in the mud is classified as high (above the quality standard). The sediment accumulation in the nine samples at three stations showed at Station 1 was 0.022429739 g cm-1 day-1. The highest accumulation rate of sediment weight was found at Station 2 which was 0.038456224 g cm-1 day-1. The lowest sediment accumulation rate was found at Station 3, which was only 0.007109631 g cm-1 day-1. The cause of the low accumulation of sediment at Station 3 was due to flow velocity at this location tends to be large, so that the sediment was difficult to settle. If the assumption was four months dry season, the accumulation of sediment was estimated at 26.9 tons / m2 / 4 months.
木西河的存在不仅对南苏门答腊岛的人口非常重要，而且对明古鲁和楠榜地区也很重要。主要的问题是高沉降率，以及据称重金属含量的增加。研究目的是测定旱季河泥的沉降速率和金属含量。2018年8月至9月，在Kemarau岛周围地区的Musi Hilir水域采集了水、泥和沉积物样本。实验室分析结果表明，该河流为中度污染，水中氨含量高于质量标准，泥中铁含量为高(高于质量标准)。3个站点9个样品的沉积物累积量在站点1为0.022429739 g cm-1 day-1。2站泥沙重量积累速率最高，为0.038456224 g cm-1 day-1。3号站的积沙速率最低，仅为0.007109631 g cm-1 day-1。3号站泥沙淤积少的原因是该位置流速往往较大，泥沙难以沉降。如果假设旱季为4个月，则沉积物累积量估计为26.9吨/ m2 / 4个月。
{"title":"Sedimentation Rate and Characteristics of Musi River Mud, Palembang City, South Sumatra","authors":"Probowati Sulistiyani, M. Imanudin, M. Said","doi":"10.20527/JWEM.V7I2.192","DOIUrl":"https://doi.org/10.20527/JWEM.V7I2.192","url":null,"abstract":"The existence of the Musi River is very important not only for the population of South Sumatra, but also for the Bengkulu and Lampung regions. The main problem is the high rate of sedimentation, and the alleged increase in heavy metal content. The research aims were to determine the sedimentation rate and metal content in river mud in dry season. Samples of water, mud, and sediments were taken in the waters of Musi Hilir in the area around Kemarau Island in August-September 2018. The results of laboratory analysis showed that the river had been moderately polluted, where the ammonia content in the water was above the quality standard, and the Fe content in the mud is classified as high (above the quality standard). The sediment accumulation in the nine samples at three stations showed at Station 1 was 0.022429739 g cm-1 day-1. The highest accumulation rate of sediment weight was found at Station 2 which was 0.038456224 g cm-1 day-1. The lowest sediment accumulation rate was found at Station 3, which was only 0.007109631 g cm-1 day-1. The cause of the low accumulation of sediment at Station 3 was due to flow velocity at this location tends to be large, so that the sediment was difficult to settle. If the assumption was four months dry season, the accumulation of sediment was estimated at 26.9 tons / m2 / 4 months.","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78592125","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 study identified factors responsible for wetland dynamics and negative marks produced on the environment in the area. It equally suggested efforts aimed at reducing effects of the factors on the environment. The study incorporated both meta-analysis of case studies and questionnaires distribution and administration to the respondents who are mainly members of the Fadama User Group (FUG). The results showed changes in rainfall intensity as the major factor responsible for wetland loss; followed by settlement developments and loss of soil water due to river drainage. The results further revealed the effects of the factors to include siltation of drainages, destruction of ecosystem and loss of wetness, and emergent of heavy flooding. The study concluded by suggesting efforts aimed at reducing the influence of the factors on the environment.
{"title":"Drivers of Wetland Conversion in the Tropical Environment","authors":"O. B. Adeleke","doi":"10.20527/JWEM.V7I2.204","DOIUrl":"https://doi.org/10.20527/JWEM.V7I2.204","url":null,"abstract":"The study identified factors responsible for wetland dynamics and negative marks produced on the environment in the area. It equally suggested efforts aimed at reducing effects of the factors on the environment. The study incorporated both meta-analysis of case studies and questionnaires distribution and administration to the respondents who are mainly members of the Fadama User Group (FUG). The results showed changes in rainfall intensity as the major factor responsible for wetland loss; followed by settlement developments and loss of soil water due to river drainage. The results further revealed the effects of the factors to include siltation of drainages, destruction of ecosystem and loss of wetness, and emergent of heavy flooding. The study concluded by suggesting efforts aimed at reducing the influence of the factors on the environment.","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"140 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75043562","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}
Research has been carried out about raw water treatment of PDAM Bandarmasih by hydrotalcite (Mg/Al) + chitosan (shell of haruan and papuyu fish) adsorbent reviews of decreasing dye value (PtCo), iron (Fe), and turbidity. This research intended to produce drinking water from utilization of fish shell that were still underutilized into chitosan to be matched with hydrotalcite (Mg/Al) with variations of 1, 2 and 3 grams with a duration of 24 hours. The results showed that the decrease in dyestuff value were 96.78%, 95.03% and 92.98%. Persentage decrease in iron (Fe) were 94.38%, 93.78 and 91.87% and percent of turbidity reduction were 97.98%, 79.76% and 76.56%. Best decrease in variations of hydrotalcite (Mg/Al) + chitosan was 1 gram for a duration of 24 hours which resulted in a decrease in dyestuff, iron and turbidity of 11 PtCo, 0.047 mg/L, 0.76 NTU where the results were appropriate in the drinking water requirements in accordance with the Regulation of the Minister of Health of the Republic of Indonesia no:492/MENKES/PES/IV/2010.
{"title":"Application of the Composite Hydrotalcite (Mg/Al)/Chitosan as Adsorbent for the Treatment of Raw Water of Municipal Waterworks PDAM Bandarmasih","authors":"M. W. Ramadhan, C. Irawan, H. Wijayanti, M. Elma","doi":"10.20527/JWEM.V7I1.197","DOIUrl":"https://doi.org/10.20527/JWEM.V7I1.197","url":null,"abstract":"Research has been carried out about raw water treatment of PDAM Bandarmasih by hydrotalcite (Mg/Al) + chitosan (shell of haruan and papuyu fish) adsorbent reviews of decreasing dye value (PtCo), iron (Fe), and turbidity. This research intended to produce drinking water from utilization of fish shell that were still underutilized into chitosan to be matched with hydrotalcite (Mg/Al) with variations of 1, 2 and 3 grams with a duration of 24 hours. The results showed that the decrease in dyestuff value were 96.78%, 95.03% and 92.98%. Persentage decrease in iron (Fe) were 94.38%, 93.78 and 91.87% and percent of turbidity reduction were 97.98%, 79.76% and 76.56%. Best decrease in variations of hydrotalcite (Mg/Al) + chitosan was 1 gram for a duration of 24 hours which resulted in a decrease in dyestuff, iron and turbidity of 11 PtCo, 0.047 mg/L, 0.76 NTU where the results were appropriate in the drinking water requirements in accordance with the Regulation of the Minister of Health of the Republic of Indonesia no:492/MENKES/PES/IV/2010.","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75297207","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 research was to examine empirically the effect of sustainability reporting disclosure on company performance. Sustainability reporting is a report that measures, discloses and shows the responsibility of the company to internal and external parties as an accountability form of organization performance in order to gain continuous development purpose. Sustainability reporting becomes trend and need for companies to disclose economic, environmental, and social performance to stakeholders. Samples used as many as 40 observations were derived from companies that consistently become ISRA (Indonesia Sustainability Reporting Award) nomination and listed in Indonesia Stock Exchange (BEI) during 2016-2017. Sustainability reporting measured by GRI (Global Reporting Initiative) continuous reporting guideline-G4 with 91 indicator items and financial performance measured by Return on Assets (ROA). The analysis method used was Multiple Linear Regression. The results of the research show that Economic Dimension Disclosure (EC) in sustainability reporting has effect on financial performance. Whereas, Environmental Dimension (EN) and Social Dimension (SO) have no effects. The condition indicates that sustainability reporting in short term has not been able to affect companies financial performance.
{"title":"The Effect of Sustainibility Reporting Disclosure and Its Impact on Companies Financial Performance","authors":"Enny Hardi, Chairina Chairina","doi":"10.20527/JWEM.V7I1.188","DOIUrl":"https://doi.org/10.20527/JWEM.V7I1.188","url":null,"abstract":"The purpose of this research was to examine empirically the effect of sustainability reporting disclosure on company performance. Sustainability reporting is a report that measures, discloses and shows the responsibility of the company to internal and external parties as an accountability form of organization performance in order to gain continuous development purpose. Sustainability reporting becomes trend and need for companies to disclose economic, environmental, and social performance to stakeholders. Samples used as many as 40 observations were derived from companies that consistently become ISRA (Indonesia Sustainability Reporting Award) nomination and listed in Indonesia Stock Exchange (BEI) during 2016-2017. Sustainability reporting measured by GRI (Global Reporting Initiative) continuous reporting guideline-G4 with 91 indicator items and financial performance measured by Return on Assets (ROA). The analysis method used was Multiple Linear Regression. The results of the research show that Economic Dimension Disclosure (EC) in sustainability reporting has effect on financial performance. Whereas, Environmental Dimension (EN) and Social Dimension (SO) have no effects. The condition indicates that sustainability reporting in short term has not been able to affect companies financial performance.","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82019892","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}
Mahakam Delta is one of the largest mangrove ecosystem areas in East Kalimantan, which is dominated by nipa (Nypa fruticans). This paper investigates the population density of nipa and measures habitat characteristics in the area, which represents the condition of mangrove ecosystem that has received heavy pressures as a result of the increase in human activities.A total of 30 plots, size of 100m2 each plot, were sampled from six locations in the study site. In each plot, the number of individual, stalk, leaves, fruit and flower of nipa was recorded. Nipa zone adjacent to active ponds area had the density of 106 individual/ha with 913 stalks ha-1. The leaf density was 336 leaves ha-1, fruit density was 12 fruits ha-1 and flower density was 12 flowers/ha. Furthermore, nipa density in locations faraway from active ponds area was 74 individual/ha with 861 stalks/ha. While the leaf density was 239 leaves/ha, fruit density in this area was 2 fruits/ha and flower density was 9 flowers/ha. Result also showed that nipa habitat in study site is characterized by high turbidity and low salinity. Among other parameters, tidal level has strongest correlation to nipa population density. This study can also be considered as a preliminary assessment to develop mangrove ecosystem rehabilitation action plans in Mahakam Delta and to consider the potential use of nipa as an alternative source of livelihood for local communities living in the vicinity of the Mahakam Delta area.
{"title":"Population Density and Habitat Characteristics of Nipa Fruticans in Degraded Mangrove Ecosystem (Case Study in Mahakam Delta, East Kalimantan)","authors":"N. S. Lestari, R. F. Noor’an","doi":"10.20527/JWEM.V7I1.193","DOIUrl":"https://doi.org/10.20527/JWEM.V7I1.193","url":null,"abstract":"Mahakam Delta is one of the largest mangrove ecosystem areas in East Kalimantan, which is dominated by nipa (Nypa fruticans). This paper investigates the population density of nipa and measures habitat characteristics in the area, which represents the condition of mangrove ecosystem that has received heavy pressures as a result of the increase in human activities.A total of 30 plots, size of 100m2 each plot, were sampled from six locations in the study site. In each plot, the number of individual, stalk, leaves, fruit and flower of nipa was recorded. Nipa zone adjacent to active ponds area had the density of 106 individual/ha with 913 stalks ha-1. The leaf density was 336 leaves ha-1, fruit density was 12 fruits ha-1 and flower density was 12 flowers/ha. Furthermore, nipa density in locations faraway from active ponds area was 74 individual/ha with 861 stalks/ha. While the leaf density was 239 leaves/ha, fruit density in this area was 2 fruits/ha and flower density was 9 flowers/ha. Result also showed that nipa habitat in study site is characterized by high turbidity and low salinity. Among other parameters, tidal level has strongest correlation to nipa population density. This study can also be considered as a preliminary assessment to develop mangrove ecosystem rehabilitation action plans in Mahakam Delta and to consider the potential use of nipa as an alternative source of livelihood for local communities living in the vicinity of the Mahakam Delta area.","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84785365","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 use of chemical fertilizers have been negative impact on environment, especially in increased the gas emissions and reduced the diversity of microbes, such as bacteria, actinomycetes, and soil fungi. As the one of the alternatively is used the combined compost. For instance, grass compost with the added of inorganic fertilizer (chemical), oil palm empty fruit bunches compost with the added of inorganic fertilizer, and the inorganic fertilizer without compost. The measuring of gas emissions was carried out on CH4, CO2 and N2O at several of the oil palm planting holes. Every sample gases were collected by the chambers installed with syringe. .Thus, the gas emissions were analyzed by chromatography gas type GHG 450 Shimadzu. Besides that, the diversity of soil fungi were also determined by the characterization and identification. The result of this research showed of reducting on CH4 that was appplied by the combined of oil palm empty fruit bunch compost with inorganic fertilizers i.e., 0.019 until-0.316 g CH4.m-2.h-1. The same patterns were also demonstrated by CO2 from the treament of oil palm empty fruit bunch with inorganic fertilizers, viz 755.246 untill-2.331 g CO2.m-2.h-1. Relating to N2O, it has undergone reduced by grass compost with inorganic fertilizers, viz-27.726 until-25.622 mg N2O.m-2.h-1 . Meanwhile, the genera of soil fungi that were found on the sites after applying combining compost, viz Aspergillus, Bipolaris, Gonatobotrys, Gonatorrhodiella, Oidiodendron, Penicillium, Rhynchosporium, Rhizopus, Trichoderma, and Trichocladium. Therefore, the use of compost with combining chemical fertilizers are potentially to apply into the oil palm field on wetlands.
化肥的使用对环境产生了负面影响，特别是增加了气体排放，减少了细菌、放线菌和土壤真菌等微生物的多样性。作为其中一种交替使用的组合堆肥。如添加无机肥料(化学)的草料堆肥，添加无机肥料的油棕空果串堆肥，以及不添加无机肥料的无机肥料。对几个油棕种植孔的CH4、CO2和N2O进行了气体排放测量。各样品气体由装有注射器的气室收集，气体排放采用GHG - 450岛津气相色谱法分析。此外，还通过鉴定鉴定确定了土壤真菌的多样性。本研究结果表明，油棕空果串堆肥与无机肥料配施对CH4的还原作用为0.019 ~ 0.316 g CH4.m-2.h-1。无机肥料处理油棕空果串产生的CO2值为75.246 ~ 2.331 g CO2.m-2 - h-1，也表现出相同的规律。对于N2O，无机肥料的草料堆肥使其减少，即从27.726 mg N2O.m-2.h-1降至25.622 mg。同时，施用复合堆肥后在试验点上发现的土壤真菌属为曲霉属(Aspergillus)、双极菌属(Bipolaris)、Gonatobotrys、Gonatorrhodiella、oididendron、青霉属(Penicillium)、Rhynchosporium、根霉属(Rhizopus)、木霉属(Trichoderma)和毛霉属(Trichocladium)。因此，在湿地油棕田中施用复合肥料是有潜力的。
{"title":"Adding Compost to Oil Palm Planting Holes can Increase the Diversity of Soil Fungi without Significantly Affecting the Gas Emissions on Wetlands","authors":"H. Nur, A. Hadi, R. Yuliani","doi":"10.20527/JWEM.V7I1.190","DOIUrl":"https://doi.org/10.20527/JWEM.V7I1.190","url":null,"abstract":"The use of chemical fertilizers have been negative impact on environment, especially in increased the gas emissions and reduced the diversity of microbes, such as bacteria, actinomycetes, and soil fungi. As the one of the alternatively is used the combined compost. For instance, grass compost with the added of inorganic fertilizer (chemical), oil palm empty fruit bunches compost with the added of inorganic fertilizer, and the inorganic fertilizer without compost. The measuring of gas emissions was carried out on CH4, CO2 and N2O at several of the oil palm planting holes. Every sample gases were collected by the chambers installed with syringe. .Thus, the gas emissions were analyzed by chromatography gas type GHG 450 Shimadzu. Besides that, the diversity of soil fungi were also determined by the characterization and identification. The result of this research showed of reducting on CH4 that was appplied by the combined of oil palm empty fruit bunch compost with inorganic fertilizers i.e., 0.019 until-0.316 g CH4.m-2.h-1. The same patterns were also demonstrated by CO2 from the treament of oil palm empty fruit bunch with inorganic fertilizers, viz 755.246 untill-2.331 g CO2.m-2.h-1. Relating to N2O, it has undergone reduced by grass compost with inorganic fertilizers, viz-27.726 until-25.622 mg N2O.m-2.h-1 . Meanwhile, the genera of soil fungi that were found on the sites after applying combining compost, viz Aspergillus, Bipolaris, Gonatobotrys, Gonatorrhodiella, Oidiodendron, Penicillium, Rhynchosporium, Rhizopus, Trichoderma, and Trichocladium. Therefore, the use of compost with combining chemical fertilizers are potentially to apply into the oil palm field on wetlands. ","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90456136","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}
Chilika a shallow brackish lagoon, India, is shrinking for sediment surplus budget. South Mahanadi deltaic branches i.e. Daya and Bhargavi terminate at the southwest swamps of the Lagoon. The annual average salinity of the lake was depleted from 22.31ppt (1957-58) to 8.5 ppt. (1999-2000) as the mixing process of saline and fresh water was influenced from 1995. Trepidation of conversion of Chilika to a atrophied fresh water lake due to blooming population and their hydrologic interventions like Kolleru lake in (India), Aral Lake (Uzbekistan) was apprehended by 1950’s and was alarming by 1999 when the shallow inlet(s) shifted extreme north. The shallow mud flats of lean salinity were reclaimed further for agriculture. The ecology and biodiversity degraded with substantial pecuniary loss to the lagoon dependents. Anthropogenic interventions like, Hirakud dam (1956), dredging of Sipakuda Inlet (2000), Naraj barrage at delta head (2004), Gobardhanpur barrages (1998) and Gabkund cut with weir (2014) were made to the hydraulic system. The deteriorating health, perturbed biodiversity and declined ecosystem of the lagoon has forced to have a comparative study of the various morphologic changes passed over the Chilika with time. The meteorological, hydrologic and the salinity study of the lagoon area for the period 1990 to 2016 have shown changes. Topographic study using GIS is developed by collecting data from Glovis Classic (Google) and the interpretation is done using ERDAS 9.2 software for various geomorphic features (1984 and 2017) before and after the current anthropogenic interventions and compared with previous studies.
{"title":"Geo-Dynamics, Salinity Gradient, and Vegetation Interdependence in Chilika Lagoon, a Tropical Wetland in Eastern India","authors":"S. Mishra, S. Mishra, Kalpataru Das","doi":"10.20527/JWEM.V7I1.186","DOIUrl":"https://doi.org/10.20527/JWEM.V7I1.186","url":null,"abstract":"Chilika a shallow brackish lagoon, India, is shrinking for sediment surplus budget. South Mahanadi deltaic branches i.e. Daya and Bhargavi terminate at the southwest swamps of the Lagoon. The annual average salinity of the lake was depleted from 22.31ppt (1957-58) to 8.5 ppt. (1999-2000) as the mixing process of saline and fresh water was influenced from 1995. Trepidation of conversion of Chilika to a atrophied fresh water lake due to blooming population and their hydrologic interventions like Kolleru lake in (India), Aral Lake (Uzbekistan) was apprehended by 1950’s and was alarming by 1999 when the shallow inlet(s) shifted extreme north. The shallow mud flats of lean salinity were reclaimed further for agriculture. The ecology and biodiversity degraded with substantial pecuniary loss to the lagoon dependents. Anthropogenic interventions like, Hirakud dam (1956), dredging of Sipakuda Inlet (2000), Naraj barrage at delta head (2004), Gobardhanpur barrages (1998) and Gabkund cut with weir (2014) were made to the hydraulic system. The deteriorating health, perturbed biodiversity and declined ecosystem of the lagoon has forced to have a comparative study of the various morphologic changes passed over the Chilika with time. The meteorological, hydrologic and the salinity study of the lagoon area for the period 1990 to 2016 have shown changes. Topographic study using GIS is developed by collecting data from Glovis Classic (Google) and the interpretation is done using ERDAS 9.2 software for various geomorphic features (1984 and 2017) before and after the current anthropogenic interventions and compared with previous studies.","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91383206","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}
Ilhamiyah Ilhamiyah, Salamiah Salamiah, Samharinto Samharinto, H. Halim
This research aimed to find a pattern of agroecosystem management that can increase arthropod diversity, production, and Return Cost Ratio (RCR) values in organic wetlands planted during the dry season. This research was set in Randomized Block Design (RAK) with seven treatments and five repetitions, namely: 1) Intercropping between green mustard and basil, with chicken manure and without Bacillus thuringiensis; 2) Intercropping between green mustard and basil with water hyacinth compost, and without B. thuringiensis; 3) intercropping between green mustard and leek, given water hyacinth compost, and without application B. thuringiensis; 4)Intercropping between green mustard and leek, given chicken manure, and without application B. thuringiensis; 5) Intercropping between green mustard and leek, given chicken manure, and given B. thuringensis application, doubled of recommended dosage; 6) Intercropping between green mustard and leek with chicken manure, and B. thuringensis application according to recommended dosage; 7) Monoculture of green mustard without organic fertilizer and without the application B. thuringiensis. From this research, it was concluded that the pattern of agroecosystem management of green mustard that can increase arthropod diversity in organic wetlands planted during dry season was the intercropping treatment between green mustard with basil, together with chicken manure and without B. thuringiensis. Meanwhile, the pattern of agroecosystem management of green mustard that can increase the production of green mustard and RCR value on the organic wetlands planted in the dry season was the intercropping treatment between green mustard with leek, together with chicken manure, and without B. thuringiensis.
{"title":"Agroecosystem Management on Green Mustard Plants in Wetlands during Dry Season","authors":"Ilhamiyah Ilhamiyah, Salamiah Salamiah, Samharinto Samharinto, H. Halim","doi":"10.20527/JWEM.V7I1.189","DOIUrl":"https://doi.org/10.20527/JWEM.V7I1.189","url":null,"abstract":"This research aimed to find a pattern of agroecosystem management that can increase arthropod diversity, production, and Return Cost Ratio (RCR) values in organic wetlands planted during the dry season. This research was set in Randomized Block Design (RAK) with seven treatments and five repetitions, namely: 1) Intercropping between green mustard and basil, with chicken manure and without Bacillus thuringiensis; 2) Intercropping between green mustard and basil with water hyacinth compost, and without B. thuringiensis; 3) intercropping between green mustard and leek, given water hyacinth compost, and without application B. thuringiensis; 4)Intercropping between green mustard and leek, given chicken manure, and without application B. thuringiensis; 5) Intercropping between green mustard and leek, given chicken manure, and given B. thuringensis application, doubled of recommended dosage; 6) Intercropping between green mustard and leek with chicken manure, and B. thuringensis application according to recommended dosage; 7) Monoculture of green mustard without organic fertilizer and without the application B. thuringiensis. From this research, it was concluded that the pattern of agroecosystem management of green mustard that can increase arthropod diversity in organic wetlands planted during dry season was the intercropping treatment between green mustard with basil, together with chicken manure and without B. thuringiensis. Meanwhile, the pattern of agroecosystem management of green mustard that can increase the production of green mustard and RCR value on the organic wetlands planted in the dry season was the intercropping treatment between green mustard with leek, together with chicken manure, and without B. thuringiensis.","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86373112","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}
Salamiah Salamiah, Muhammad Anton Ciptady, C. Nisa
The productivity of onion in Indonesia is generally low due to fusarium wilt disease. Biological controls can be applied using PGPR and Mycorrhizae. The purpose of this research was understand the interaction between PGPR and Mycorrhizal inoculation against fusarium wilt intensity as well as the growth and yield of onions. The isolation of Fusarium oxysporum f.sp cepae and PGPR, followed by the tests of PGPR inhibition ability, phosphate solvent and HCN compound productivity. The method used in the field was a completely randomized design (CRD) with 2 replications. Results showed that the combination of PGPR and mycorrhizae as a whole was unable to suppress Fusarium wilt disease, but had significant effect to postpone the incubation period (26,19 days after inoculation) and increase the growth and yield of onion compared to the onion plants infected with Fusarium but without the combined treatment of PGPR and mycorrhizae and the PGPR treatment and mycorrhizal treatment as single treatments; the application of mycorrhizae as the single factor had a very significant effect on the number of bulbs, but had no significant effect on the inhibition of fusarium wilt intensity as well as the growth and yield of onions.
{"title":"Control of Fusarium Disease in Onion with Plant Growth Promoting Rhizobacteria (PGPR) and Mycorrhizae and Its Effect on Growth and Yield of Onion","authors":"Salamiah Salamiah, Muhammad Anton Ciptady, C. Nisa","doi":"10.20527/JWEM.V7I1.184","DOIUrl":"https://doi.org/10.20527/JWEM.V7I1.184","url":null,"abstract":"The productivity of onion in Indonesia is generally low due to fusarium wilt disease. Biological controls can be applied using PGPR and Mycorrhizae. The purpose of this research was understand the interaction between PGPR and Mycorrhizal inoculation against fusarium wilt intensity as well as the growth and yield of onions. The isolation of Fusarium oxysporum f.sp cepae and PGPR, followed by the tests of PGPR inhibition ability, phosphate solvent and HCN compound productivity. The method used in the field was a completely randomized design (CRD) with 2 replications. Results showed that the combination of PGPR and mycorrhizae as a whole was unable to suppress Fusarium wilt disease, but had significant effect to postpone the incubation period (26,19 days after inoculation) and increase the growth and yield of onion compared to the onion plants infected with Fusarium but without the combined treatment of PGPR and mycorrhizae and the PGPR treatment and mycorrhizal treatment as single treatments; the application of mycorrhizae as the single factor had a very significant effect on the number of bulbs, but had no significant effect on the inhibition of fusarium wilt intensity as well as the growth and yield of onions.","PeriodicalId":30661,"journal":{"name":"Journal of Wetlands Environmental Management","volume":"89 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76709794","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}
Fires in Indonesia tropical peatlands are always associated with peatland conversion. Land use change usually occurs from secondary or primary forest to agricultural land or plantation. However, land use change in Indonesia is inevitable because high demand of land for food supply. Peatlands which are usually associated with wetlands, become dry due to drainage during land clearing and plant growth process. Therefore, the relationship between ground water level (GWL) and fires on tropical peatlands is close. The research objective is to analyze the level of fire vulnerability on peatlands based on the GWL fluctuation under different land uses. GWL measurement was conducted manually every week from February to December 2014 in the field and ditch on three different land uses. Automatic water level measurement tool also conducted from March to December 2014, but only on the field. GWL fluctuation both on ditch and field followed the variation of precipitation. GWL fluctuation under different land uses also significantly different, and automatically results different fire vulnerability.
{"title":"Ground Water Table under Different Land Uses","authors":"N. Wakhid, Siti Zakiah","doi":"10.20527/JWEM.V6I2.182","DOIUrl":"https://doi.org/10.20527/JWEM.V6I2.182","url":null,"abstract":"Fires in Indonesia tropical peatlands are always associated with peatland conversion. Land use change usually occurs from secondary or primary forest to agricultural land or plantation. However, land use change in Indonesia is inevitable because high demand of land for food supply. Peatlands which are usually associated with wetlands, become dry due to drainage during land clearing and plant growth process. Therefore, the relationship between ground water level (GWL) and fires on tropical peatlands is close. The research objective is to analyze the level of fire vulnerability on peatlands based on the GWL fluctuation under different land uses. GWL measurement was conducted manually every week from February to December 2014 in the field and ditch on three different land uses. Automatic water level measurement tool also conducted from March to December 2014, but only on the field. GWL fluctuation both on ditch and field followed the variation of precipitation. GWL fluctuation under different land uses also significantly different, and automatically results different fire vulnerability.","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":"84058308","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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