基于土壤肥力的江苏省耕作层土壤剥离分区与深度确定
发布时间：2018-11-08 15:51
【摘要】：耕作层土壤是农业生产的物质基础,是耕地资源的核心,剥离利用对保障耕地数量和质量动态平衡具有重要意义。该研究在江苏省内收集了来自20世纪80年代的201个代表性土壤剖面及其不同层次有机质、容重、p H值、全氮、全磷、速效钾和土层厚度等属性数据,通过主成分分析确定江苏省耕地肥力差异主控因子,在此基础上运用聚类分析得出江苏省耕地肥力性质差异分区,最后采用显著性检验方法,得出了全省不同分区下耕地耕作层土壤剥离深度。通过研究发现:1)对于所选取的指标体系来看,影响全省耕地肥力性质差异的因素主要有p H值、全磷、全氮含量和容重。2)江苏省耕地土壤亚耕层/犁底层与表耕层肥力相似、性状略差,应考虑剥离利用,而心土层与表耕层、亚耕层/犁底层差异较大,不具有所需的质量,不宜剥离利用。3)全省耕作层土壤剥离深度可分为6个区,分区结果与农业综合区划相类似。4)耕作层土壤剥离深度应区分水田、旱地、菜地,并结合全省不同地区的耕地保护压力、耕地(农用地)年转用量、复垦开发补充耕地面积情况等,实施差别化的管理。可为江苏省耕作层剥离工作提供参考。
[Abstract]:Ploughing layer soil is the material basis of agricultural production and the core of cultivated land resources. Stripping and utilization is of great significance to ensure the dynamic balance between quantity and quality of cultivated land. In this study, 201 representative soil profiles and their, p H values of organic matter, bulk density, total nitrogen, total phosphorus, available potassium and soil layer thickness were collected from the Jiangsu Province in the 1980s. The main controlling factors of cultivated land fertility difference in Jiangsu Province were determined by principal component analysis. On the basis of cluster analysis, the difference zoning of cultivated land fertility properties in Jiangsu Province was obtained, and the significance test method was used at last. The delamination depth of cultivated land layer was obtained in different zones of the province. It is found that: 1) for the selected index system, the main factors influencing the difference of cultivated land fertility in the province are pH value, total phosphorus, and total phosphorus. Total nitrogen content and bulk weight. 2) the soil fertility of subtilling layer / plow layer in Jiangsu Province is similar to that of topsoil layer, and the character is a little bad, so it should be taken into consideration of stripping utilization, but the difference between the subtilling layer and topsoil layer in the core soil layer and the topsoil layer of plough layer is great, so it does not have the required quality. The soil peel depth of cultivated layer in the whole province can be divided into 6 regions, and the result of division is similar to that of agricultural comprehensive regionalization. 4) the soil stripping depth of cultivated layer should be divided into paddy field, dry land and vegetable field. Combining with the pressure of cultivated land protection in different areas of the province, the annual conversion of cultivated land (agricultural land) and the situation of reclaiming and developing supplementary cultivated land area, the differential management is implemented. It can be used as a reference for the stripping of cultivated layer in Jiangsu Province.
【作者单位】： 南京大学地理与海洋科学学院;江苏省土地开发中心;南京南源土地开发利用咨询有限公司;
【基金】：国土资源部公益性行业科研专项(201211050-05) 江苏省重大科技专项(BE2015708)
【分类号】：S151.9
[Abstract]:Ploughing layer soil is the material basis of agricultural production and the core of cultivated land resources. Stripping and utilization is of great significance to ensure the dynamic balance between quantity and quality of cultivated land. In this study, 201 representative soil profiles and their, p H values of organic matter, bulk density, total nitrogen, total phosphorus, available potassium and soil layer thickness were collected from the Jiangsu Province in the 1980s. The main controlling factors of cultivated land fertility difference in Jiangsu Province were determined by principal component analysis. On the basis of cluster analysis, the difference zoning of cultivated land fertility properties in Jiangsu Province was obtained, and the significance test method was used at last. The delamination depth of cultivated land layer was obtained in different zones of the province. It is found that: 1) for the selected index system, the main factors influencing the difference of cultivated land fertility in the province are pH value, total phosphorus, and total phosphorus. Total nitrogen content and bulk weight. 2) the soil fertility of subtilling layer / plow layer in Jiangsu Province is similar to that of topsoil layer, and the character is a little bad, so it should be taken into consideration of stripping utilization, but the difference between the subtilling layer and topsoil layer in the core soil layer and the topsoil layer of plough layer is great, so it does not have the required quality. The soil peel depth of cultivated layer in the whole province can be divided into 6 regions, and the result of division is similar to that of agricultural comprehensive regionalization. 4) the soil stripping depth of cultivated layer should be divided into paddy field, dry land and vegetable field. Combining with the pressure of cultivated land protection in different areas of the province, the annual conversion of cultivated land (agricultural land) and the situation of reclaiming and developing supplementary cultivated land area, the differential management is implemented. It can be used as a reference for the stripping of cultivated layer in Jiangsu Province.
【作者单位】： 南京大学地理与海洋科学学院;江苏省土地开发中心;南京南源土地开发利用咨询有限公司;
【基金】：国土资源部公益性行业科研专项(201211050-05) 江苏省重大科技专项(BE2015708)
【分类号】：S151.9
【参考文献】
相关期刊论文 前10条
1 刘露;周生路;田兴;王晓瑞;苏全龙;朱雁;王君j，
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