兴安县耕地地力等级划分与评价

【目的】为科学评价兴安县耕地综合生产力，配合测土配方施肥项目的实施，推进农业产业结构调整。【方法】根据《全国耕地类型区、耕地地力等级划分》（NY/T309—1996）标准，参照《耕地地力评价指南》技术流程，运用“兴安县耕地资源管理信息系统”对兴安县耕地地力进行等级划分与科学评价。【结果】兴安县耕地地力划分为7个等级，一、二等级田（地）面积为4344ha，占耕地总面积的12．7％；三、四、五等级田（地）面积为24255ha，占耕地总面积的71．3％；六、七等级田（地）面积为5430ha，占耕地面积的16．0％。【建议】在生产管理上，针对七级田地不同土壤特点，应采取不同的改良措施，加强改造：通过深耕深翻，加深耕作层；合理施用化肥；加大有机肥的投入；推广绿肥种植，推行秸秆还田；加强水利设施建设，改良灌溉设施，提升耕地地力等级。

Evaluation and classification of grades of cultivated land in Xing' an

Objective ]The present study was conducted to scientifically evaluate the fertility status of cultivated land in order to implement soil testing based fertilizer applications, and to adjust the structural of agricultural industry for its sustainability in Xing＇ an county. Method ]According to standards of national cultivated land classification （NY/T309-1996）, the grades of cultivated land were classified and scientific evaluation was performed referring to the techniques mentioned in the guidebook of evaluation of the cultivated land fertility, and used the information management system resources of the cultivated land in Xing＇ an county. Result]The cultivated land of Xingan county was divided into seven grades of fertility. The grade 1-2, 3-5 and 6-7 covered 4344 （12.7%）, 24255 （71.3%） and 5430 ha （16.0%） areas of cultivated land. Suggestion]It has been suggested that different improvement measures should be taken into account which must be based on the grades of cultivated land. Some of the measures suggested include strengthening the practice of deep plowing; balanced and soil test based application of fertilizer, enhancing application of organic fertilizers; promoting green manure plantations and straw/trash returning to the soils; promoting construction of water conservation facilities, improved irrigation facilities, etc.