非农建设占用耕地耕层土壤剥离潜力评价方法
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国家科技支撑计划项目(2013BAJ11B02)


Potential evaluation method on plow layer soil-stripping of cultivated land occupied by non-agricultural construction
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    摘要:

    在开发建设项目日益扩大增长的今天,剥离被非农建设占用的耕地,是缓解人地矛盾,保护耕地资源的有效措施。该文在ArcGIS的技术支持下,以重庆市江津区为例,从耕层土壤质量与耕地质量2个角度,提供了一种定量评价了非农建设占用耕地可剥离的耕层土壤剥离潜力的方法。将研究区耕层土壤质量等级图层与非农建设占用的耕地质量等级图层叠加,得出江津区非农建设占用耕地可剥离耕层土壤资源潜力,可剥离的耕层土壤总面积达到了30.18 km2,占非农建设占用耕地总面积的76.39%,主要集中在江津区经济发达、非农建设发展迅速,地势低平、集中连片、交通便利、增值潜力巨大的中北部地区。根据江津区耕层土壤质量等级以及江津区非农建设占用的耕地质量等级,将可剥离的耕层土壤划分为3个等级,以便确定非农建设占用的耕层土壤剥离的优先秩序以及后备土壤资源;可剥离的优质耕层土壤资源稀缺,一级可剥离耕层土壤面积仅为0.32 km2,占可剥离耕层土壤总量的1.03%,二级可剥离耕层土壤面积为4.64 km2,占可剥离耕层土壤总量的15.37%。因此在丘陵山地开发建设的过程中耕地保护任务重大,更需对被占用优质的耕地进行耕层土壤剥离。该文为区域开发建设、耕地资源保护提供了科学依据,对后续的耕层土壤利用规划乃至西南丘陵山地区的非农建设规划布局具有一定借鉴意义。

    Abstract:

    Abstract: Stripping plow layer soil of cultivated land occupied by non-agricultural construction is an effective measure to reduce the contradiction between people and land, and to protect the cultivated land resources as city development and construction projects are increasing. Based on geographic information system (GIS) technology, from the aspects of the plow layer soil quality and the cultivated land quality, this study proposed a quantitative evaluation method about the potential of the plow layer soil-stripping of the cultivated land occupied by non-agricultural construction, and Jiangjin District of Chongqing was chosen as an example. Firstly, in order to ensure that plow layer soil-stripping was fertile, the indictors including organic matter, alkali-hydrolysable nitrogen (N), available phosphorus (P), available potassium (K), total N, total P and total K were chosen to evaluate the quality of plow layer soil in Jiangjin District. The fuzzy mathematical evaluation method was used in the determination of the membership degree about evaluation indicators of plow layer soil quality. The analysis hierarchy process was used in the determination of the weight of evaluation indicators. The fuzzy set weighted synthesis method was applied to establish a comprehensive evaluation model for plow layer soil quality in Jiangjin District. Based on ArcGIS, the quality of plow layer soil in Jiangjin District was discussed by using the ordinary Kriging method, which was divided into 5 levels. Then, in order to save the financial resource and human resource, reduce the project cost and realize the scale stripping and improve the benefit of project, the indicators of slope, soil thickness, distance to lane and single plot area were chosen to evaluate the quality of cultivated land occupied by non-agricultural construction in Jiangjin District. By using the Superposition Tool and Statistical Tool in Analysis Tools of ArcGIS, the cultivated land occupied by construction land in Jiangjin District from 2013 to 2020 could be inferred. With reference to the evaluation indicators of cultivated land quality, the cultivated land occupied by non-agricultural construction in Jiangjin District could be divided into 5 levels. Finally, according to the level of plow layer soil quality and the level of cultivated land quality, the potential of plow layer soil-stripping in Jiangjin District could be calculated and the plow layer soil-stripping could be divided into 3 levels. The results showed that: 1) The area of plow layer soil-stripping was 30.18 km2 in Jiangjin District, accounting for 76.39% of the total area of the cultivated land occupied by non-agricultural construction. The plow layer soil-stripping was mainly concentrated in northern and central Jiangjin District where existed booming economy, rapid development, flat terrain, contiguous cultivated land, convenient transportation, huge value-added potential. The levels of plow layer soil-stripping determined the priority of the plow layer soil-stripping and the reserve of soil resources. 2) The plow layer soil-stripping was scarce, and Level 1 and 2 were 0.32 and 4.64 km2, respectively, accounting for only 1.03% and 15.37% of the plow layer soil-stripping respectively. Therefore, the protection of cultivated land was a major task, and the high-quality soil layer in cultivated land occupied by non-agricultural construction should be stripped off in the development and construction in southwest hilly area. This study provides a scientific basis for the layout of regional non-agricultural construction and the protection of cultivated land, as well as some references for the subsequent use of plow layer soil.

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陈心佩,钟守琴,魏朝富.非农建设占用耕地耕层土壤剥离潜力评价方法[J].农业工程学报,2016,32(5):289-296. DOI:10.11975/j. issn.1002-6819.2016.05.042

Chen Xinpei, Zhong Shouqin, Wei Chaofu. Potential evaluation method on plow layer soil-stripping of cultivated land occupied by non-agricultural construction[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE),2016,32(5):289-296. DOI:10.11975/j. issn.1002-6819.2016.05.042

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  • 收稿日期:2015-07-01
  • 最后修改日期:2016-01-12
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  • 在线发布日期: 2016-01-29
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