玉米秸秆还田对麦田土壤养分的影响

通过比较实验,对目前黄淮地区小麦—玉米一年两熟种植制度下,玉米秸秆粉碎还田对麦田土壤养分的影响进行了研究。结果表明:秸秆还田处理中土壤中的有效氮、有效磷、有效钾、有机质含量均比未还田处理高,有效氮平均增加11.99mg/kg,有效磷平均增加7.34mg/kg,有效钾平均增加41.07mg/kg,有机质平均增加0.29g/kg。玉米秸秆还田能改善土壤酸碱度,改善土壤有效养分的供应状况,增加土壤有机质含量。

Effects of Corn Straw Returning to Field on Wheat Field Soil Nutrient

With the comparative experiment ,effects of corn straw returning on wheat field soil nutrient were studied under the double-cropping system of wheat-corn in the Huang-huai region. The results indicated that the content of available nitrogen, available phosphorus, available potassium and organic matter in soil with straw returning was higher than those of soil with non-straw returning, and the content of available nitrogen was increased by 11.99 mg/kg, ; available phosphorus by 7.34 mg/kg, available potassium by 41.07 mg/kg, organic matterby 0.29g/kg. Therefore, corn straw returning can improve soil pH value and soil available nutrient, increase soil organic matter content.