【摘要】：耕作層土壤是農(nóng)業(yè)生產(chǎn)的物質(zhì)基礎(chǔ),是耕地資源的核心,剝離利用對(duì)保障耕地?cái)?shù)量和質(zhì)量動(dòng)態(tài)平衡具有重要意義。該研究在江蘇省內(nèi)收集了來(lái)自20世紀(jì)80年代的201個(gè)代表性土壤剖面及其不同層次有機(jī)質(zhì)、容重、p H值、全氮、全磷、速效鉀和土層厚度等屬性數(shù)據(jù),通過(guò)主成分分析確定江蘇省耕地肥力差異主控因子,在此基礎(chǔ)上運(yùn)用聚類(lèi)分析得出江蘇省耕地肥力性質(zhì)差異分區(qū),最后采用顯著性檢驗(yàn)方法,得出了全省不同分區(qū)下耕地耕作層土壤剝離深度。通過(guò)研究發(fā)現(xiàn):1)對(duì)于所選取的指標(biāo)體系來(lái)看,影響全省耕地肥力性質(zhì)差異的因素主要有p H值、全磷、全氮含量和容重。2)江蘇省耕地土壤亞耕層/犁底層與表耕層肥力相似、性狀略差,應(yīng)考慮剝離利用,而心土層與表耕層、亞耕層/犁底層差異較大,不具有所需的質(zhì)量,不宜剝離利用。3)全省耕作層土壤剝離深度可分為6個(gè)區(qū),分區(qū)結(jié)果與農(nóng)業(yè)綜合區(qū)劃相類(lèi)似。4)耕作層土壤剝離深度應(yīng)區(qū)分水田、旱地、菜地,并結(jié)合全省不同地區(qū)的耕地保護(hù)壓力、耕地(農(nóng)用地)年轉(zhuǎn)用量、復(fù)墾開(kāi)發(fā)補(bǔ)充耕地面積情況等,實(shí)施差別化的管理。可為江蘇省耕作層剝離工作提供參考。
[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.
【作者單位】： 南京大學(xué)地理與海洋科學(xué)學(xué)院;江蘇省土地開(kāi)發(fā)中心;南京南源土地開(kāi)發(fā)利用咨詢(xún)有限公司;
【基金】：國(guó)土資源部公益性行業(yè)科研專(zhuān)項(xiàng)(201211050-05) 江蘇省重大科技專(zhuān)項(xiàng)(BE2015708)
【分類(lèi)號(hào)】：S151.9

【參考文獻(xiàn)】

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本文編號(hào)：2318943