| Cite this article: | 汪甜甜,费坤,江文娟,等.宣州区耕地质量等级评价及灌排能力对耕地质量影响[J].灌溉排水学报,0,():-. |
| WANG Tiantian,FEI Kun,JIANG Wenjuan,et al.宣州区耕地质量等级评价及灌排能力对耕地质量影响[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Evaluation of cultivated land quality grade and influence of irrigation and drainage capacity on cultivated land quality in Xuanzhou District1 |
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WANG Tiantian1, FEI Kun1, JIANG Wenjuan1, MA Zhongwen1, KUI Xiu2, MA Youhua1
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1.Key Laboratory of farmland ecological conservation and pollution prevention and control of Anhui Province,College of resources and environment,Anhui Agricultural University;2.Xuanzhou District Bureau of planting
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| Abstract: |
| 【Objective】The purpose of this paper is to find out the spatial distribution characteristics of cultivated land quality grade and main nutrients in Xuanzhou District, understand the influence of irrigation and drainage capacity on cultivated land quality, and protect and improve the quality of cultivated land.【Method】Under the support of GIS technology and county cultivated land resources management information system software, the comprehensive evaluation of cultivated land quality was carried out by using analytic hierarchy process, Delphi method and fuzzy evaluation method, and the grade results, main nutrients and irrigation and drainage capacity were analyzed.【Results】The results show that: (1) The cultivated land quality grade of Xuanzhou District is divided into 1~9 grades, with an average grade of 4.22. Among them, high-yield farmland (1~3 grades) accounts for 18.18% of the total cultivated land area, mainly distributed in the north and central regions of the region; middle yield farmland (4~6 grades) accounts for 80.55% of the total cultivated land area, widely distributed in the region; Low yield farmland (7~9 grades ) accounts for 1.27% of the total cultivated land area, which is mainly distributed in the southern region. (2) The average contents of soil organic matter, available phosphorus and available potassium in Xuanzhou District are respectively 24.4g/kg, 19.56mg/kg and 115mg/kg,which are in the middle level; the main nutrient contents of cultivated land with higher quality are also higher. (3) The irrigation capacity of the cultivated land in the northern plain is better than that in the southern mountainous area, and the drainage capacity of the cultivated land in the high-order terrain is better than that in the low-order terrain; The cultivated land with irrigation and drainage capacity of "fully satisfied" and "satisfied" is in higher quality level, which is concentrated in 1~6 grades, mostly high or middle yield fields, while the cultivated land with irrigation and drainage capacity of "basically satisfied" and "unsatisfied" is in lower quality level, which is concentrated in 4~9, mostly medium or low yield fields.【Conclusion】The average grade of cultivated land quality in Xuanzhou District is 4.22, and the irrigation and drainage capacity in the north is better than that in the south, and the quality grade is generally higher. The irrigation and drainage capacity has a greater impact on the quality grade of cultivated land. The "high standard farmland" construction project can be combined to improve the irrigation and drainage capacity of cultivated land and improve the quality of cultivated land. |
| Key words: cultivated land; cultivated land quality; grade evaluation;irrigation and drainage capacity;Xuanzhou District |
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