东北平原典型农业县不同利用方式对耕地土壤养分状况的影响研究

研究不同利用方式对耕地土壤养分状况的影响，可以为有效地指导农业生产、促进土地资源的保护和持续利用提供科学依据。在获取大量土壤养分数据的基础上，系统地分析了不同耕地利用方式对吉林省德惠市土壤养分状况的影响。结果表明，在11种土壤养分中，有效锰、有效磷、有效锌、有效铁和有效铜在不同利用方式下变异系数较大。不同耕地利用方式对土壤全氮、有效磷、速效钾、缓效钾具有显著影响，而对土壤有机质的影响不显著。因农户对菜地的投入及管理水平明显高于粮田，造成菜地土壤的大量元素含量高于粮田。除有效钼在旱田和水田中的含量无显著差异外，水田中的有效铜、锌、铁、锰、硼均明显高于旱田，主要原因为水稻田施微肥较多。表4，参16。

Analysis of the Effects of Land Use Types on Soil Nutrient Conditions in Cultivated Land of a Typical Agricultural County,Northeast Plain

It will be of significance to explore the effects of different land use types on soil nutrients of croplands, for instructing agricultural production , protection and sustainable use of land resources.This study analyzed systematically impact of land use type on soil nutrient conditions of Dehui County, Jilin Province. Results showed that, among eleven soil nutrients, available Mn, phophorus, Zn, Fe and available Cu have the biggest coefficients of variation. Different land use types of cultivated land affected soil total nitrogen,available phosphorus, available potassium and non-exchangeable potassium significantly. However,the effect of land use type on soil organic matter was not obvious. Because of the larger amount of fertilization and higher management level, the contents of macronutrients in vegetable land were higher than those in farmlands. Except available Mo .available Cu,Zn,Fe,Mn and B concentrations in paddy field were bigger than those in dry fanning land. This results was attributed to more trace element fertilization.