| 引用本文: | 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,2021,(11):79-89. |
| 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,2021,(11):79-89. |
|
| 摘要: |
| 【目的】查清宣州区耕地质量等级与主要养分的空间分布特征，了解灌排能力对耕地质量的影响，保护并提升耕地质量。【方法】在GIS技术和县域耕地资源管理信息系统软件支持下，利用层次分析法、Delphi法及模糊评价等方法对耕地质量进行综合性评价，并对等级结果、主要养分及灌排能力进行了分析。【结果】①宣州区耕地质量等级分为1~9个等级，平均等级为4.22等，其中高产田（1~3等级耕地）占全区耕地总面积的18.18%，主要分布在全区的北部及中部地区；中产田（4~6等级耕地）占全区耕地总面积的80.55%，在全区广泛分布；低产田（7~9等级耕地）占耕地总面积的1.27%，集中分布在南部地区。②宣州区耕地土壤平均有机质、有效磷和速效钾量分别为24.4 g/kg、19.56 mg/kg和115 mg/kg，均处于中等水平。③宣州区北部平原地形比南部山区地形耕地的灌溉能力更好，高阶地形比低阶地形耕地的排水能力更好；灌排能力为“充分满足”和“满足”的耕地，质量等级也普遍较高，集中在1~6等地，大多为高、中产田，而灌排能力为“基本满足”和“不满足”的耕地，质量等级一般较低，集中在4~9等地，大多为中、低产田。【结论】宣州区耕地质量平均等级为4.22等，北部相对于南部地区耕地灌排能力较好，质量等级普遍较高，灌排能力对耕地质量等级影响较大，可结合“高标准农田建设”项目来提高耕地灌排能力，提升耕地质量。 |
| 关键词: 耕地；耕地质量；等级评价；灌排能力；宣州区 |
| DOI：10.13522/j.cnki.ggps.2021126 |
| 分类号: |
| 基金项目: |
|
| Soil Quality Classification and the Impact of Irrigation and Drainage in the Region of Xuanzhou in Anhui Province |
|
WANG Tiantian, FEI Kun, JIANG Wenjuan, et al
|
|
(1. Key Laboratory of farmland ecological conservation and pollution prevention and control of Anhui Province,
College of resources and environment, Anhui Agricultural University, Hefei 230036, China;
2.Xuanzhou District Bureau of planting, Xuanzhou 242000, China
|
| Abstract: |
| 【Objective】The purpose of this paper is to present a method to clarify soil quality and analyze the impact of irrigation and drainage on it.【Method】We took the region of Xuanzhou as an example. Sizes and soil quality of agricultural lands at county scale in the region were analyzed using GIS. The soil quality was evaluated using the analytic hierarchy process, Delphi and fuzzy evaluation methods.【Results】① Soil quality in the studied region was divided into nine grades, with the average grading over the whole region being 4.22. Among them, high-yield farmland with grades of 1~3 accounted for 18.18% of the total cultivated land, and was distributed mainly in the north and center of the region. Moderate-yield farmland associated with 4~6 soil grades accounted for 80.55% of the total cultivated land, and was distributed in all counties across the region. Low-yield land associated with 7~9 grade accounted for 1.27% of the total land, found mainly in the south of the region. ② The average soil organic matter content, available phosphorus and potassium in the region were 24.4 g/kg, 19.56 mg/kg and 115 mg/kg, respectively. The main nutrient contents in grading 1~3 soils were higher than those in other soils. ③ Irrigation facility in the north of the region is better than that in the south, while the drainage facility in the high-terrain areas is better than that in the low-terrain areas. Areas with satisfied or fully-satisfied irrigation and drainage systems are associated with soils with grades of 1~6, giving middle-high crop yield, while areas with less-satisfied and unsatisfied irrigation and drainage facilities have low soil quality with grades of 4~9, giving rise to low-moderate crop yield.【Conclusion】The average soil quality grading in Xuanzhou District was 4.22, and was affected by irrigation and drainage facilities. Constructing high-standard farmland thus needs to consider improving irrigation and drainage facilities. |
| Key words: cultivated land; soil quality; soil quality classification; irrigation and drainage; Xuanzhou District |
