市一级的土壤健康和可持续土地资源管理实践:以尼泊尔贾约尔科特区Bheri Nagarpalika(市)为例

K. Pokhrel
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引用次数: 1

摘要

在尼泊尔,各种行为者对有限资源的压力和需求日益增加,土地退化,生物多样性丧失和气候变化要求合理利用土地资源,以维持和提高生产力,维护有弹性的生态系统,实现资源的可持续和有效利用,同时考虑到生物物理和社会经济层面。关于这一点,尼泊尔政府已经根据《2019年国家土地使用法》(2076 B.S.)实现并启动了科学和可持续的土地利用分区,以切实可行和可持续的方式利用土地资源。利用空间信息技术,如z -3卫星图像,遥感(RS),全球定位系统(GPS)和地理信息系统(GIS)。采用多准则决策(MCDM)方法获取时空数据,通过基于野外观测和室内分析结果的专家判断技术,发现我市土壤养分状况存在空间差异,pH值偏高,呈酸性至微碱性,但大部分土壤呈微酸性(39.58%)。土壤以壤土和砂壤土为主,有机质含量极低至高。市区大部分地区有机质含量处于中等水平。氮的含量从极低到极高,磷的含量也在37.69%的范围内。钾含量也处于很高或很低的水平,37%的土地面积钾含量很高。建议以淋溶性土壤为主的酸性土壤复垦,适当施氮加有机质,以提高作物产量。
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Soil Health and Sustainable Land Resource Management Practices at Municipal Level: A Case from Bheri Nagarpalika (Municipality), Jajorkot District, Nepal
The increasing challenges of pressure and ever-growing demands on limited resources in Nepal by diverse actors, land degradation, biodiversity lossand climate change require the rational use of land resources to sustain andenhance productivity and maintain resilient ecosystems for achieving thesustainable and efficient use of resources, taking into account biophysicaland socioeconomic dimensions. Regarding this, Nepal Government has realized and taken initiation of scientific and sustainable land use zoning following the National Land Use Act 2019 (2076 B.S.) to use land resourcesin practicable and sustainable manner. Using spatial information techniquessuch asZ-3 satellite image, remote sensing (RS), global positioning system(GPS) and geographic information system (GIS). Multicriteria decisionmaking (MCDM) methods for acquiring spatial/temporal data, throughexpert judgment techniques based on field observation as well as laboratoryanalysis result, it was found that the soil nutrient status of, the municipalityvaried spatially and has pH with very high acidic to slightly alkaline butmost of the soils are slightly acidic (39.58%). Majority of the soil are loamand sandy loam type with very low to high level of organic matter. Mostof the municipal area is under medium range of organic matter. Nitrogencontent ranges from very low to very high level as to same ranges of phosphorous (37.69%). Potassium level is also in very high to low as 37 percent land area has high level of potassium. Reclamation of acidic soil mainly in leachable soil is recommended with the proper management of Nitrogen with addition of organic matter is needed to manage for improving crop production.
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