基于土壤限制因子改良的耕地质量等别提升研究

Study of Arable Land Quality Enhancement after Soil Improvement

基于农安县农用地分等工作数据,确定影响研究区耕地质量等别的土壤限制因子,探索对应的土壤改良方法并判定不同改良组合模式下土壤限制因子改良后的耕地质量等别,分析土壤限制因子改良对耕地质量等别提升的效果。结果表明,通过对农安县典型试验区存在的土壤有机质含量、剖面构型和土壤酸化程度3个土壤限制因子在不同组合模式下进行改良,国家自然等别最高可提升一等,国家利用等别最高可提升一等,最大提升效果可将国家自然等别指数从1 756提升至2 345,将国家利用等别指数从1 003提升至1 242。土壤限制因子改良对提升耕地质量具有重要作用。

This study focus on the importance of soil factors to the quality of arable land,and get Nong＇an County,Jilin Province as a case. Based on date from farmland evaluation in Nong＇an County, making sure what soil factor limit the quali- ty of arable land and proposing targeted soil improvement method. Then calculate the degree of arable land quality and analy- sis the effect of soil improvement to the degree of arable land quality. The results show that there are three soil factors exist to limit the quality of arable land in experimental zone, they are soil organic content, soil construction and soil pH. Through improvement of these soil factors in different combination, the national natural degree of arable land quality from 11 to 10 and national utilizable degree from 10 to 9 at most in Nong＇an county. Correspondingly, the national natural degree index of arable land quality from 1 756 to 2 345 and national utilizable degree index from 1 003 to 1 242 at most. Soil improvement can play an important role in arable land quality enhancement.