有机肥部分替代化肥对小麦产量和土壤的影响

为了实现化肥减量增效,提高耕地质量,进行有机肥部分替代化肥对小麦产量和土壤的影响研究。结果表明:小麦产量随着有机肥替代量的增加而下降,50%替代处理较对照化肥区减产显著;土壤有机质、全氮、有效磷和速效钾含量随有机肥替代量的增加而增加,但差异不显著。综合产量、茎蘖动态、土壤等因素,响水地区小麦种植过程中有机肥替代化肥的适宜量为10%～20%。

Effects of partial substitution of organic fertilizer for chemical fertilizer on Wheat Yield and soil

In order to improve the quality of wheat field and the utilization rate of chemical fertilizer, we studied the effects of partial substitution of organic fertilizer for chemical fertilizer on wheat output and soil fertility under isonitrogenous conditions, the results showed that: wheat yield decreased with the increase of organic fertilizer substitution, when the replacement amount reached 50%, the yield was obviously reduced, the yield difference was not obvious when the substitution was less than 50%; The results showed that the highest tiller number and effective panicle number decreased with the increase of organic fertilizer substitution; Soil organic matter, total nitrogen, available phosphorus and available potassium increased with the increase of organic fertilizer substitution, but there was no significant difference among treatments by analysis of variance. Considering the factors of wheat yield, tiller dynamics, soil and other factors, 10-20% of organic fertilizer is the best to replace part of chemical fertilizer (nitrogen).