秸秆还田对东北农田土壤养分及春玉米产量的影响
首发时间:2017-05-10
摘要:为探究秸秆还田对我国东北地区农田土壤养分及春玉米产量的影响,设置了不同的秸杆还田水平处理,分别为:对照(CK),单施化肥(NPK),1/3秸秆还田量配施化肥(S1NPK),1/2秸秆还田量配施化肥(S2NPK),秸秆全部还田配施化肥(S3NPK)5个处理。结果表明:不同秸秆还田水平下,土壤有机碳和全氮含量随土层深度表现为明显的分层现象,土壤速效磷和速效钾含量只表现在耕层(0-20cm)富集,秸秆配施化肥处理可以提高不同土层各养分含量。S2NPK处理春玉米产量最高,较CK处理增产48.88%,略高于NPK处理,为0.68%。说明单施化肥可以增加春玉米产量,但1/2秸秆还田量配施化肥增产效果更好.在农业生产中,秸秆还田是一种切实有效的养地增产的措施,但建议秸秆还田量应以50%为宜。
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Effects of straw returning on soil nutrients and yield of Spring Maize in Northeast China
Abstract:In order to investigate the effect of straw returning on soil nutrients and yield of Spring Maize in Northeast china,we set up different levels of straw returning to field treatments including Control (CK), single application of chemical fertilizer (NPK), 1/3 straw returned to the amount of chemical fertilizer (S1NPK), 1/2 straw returned to the amount of chemical fertilizer (S2NPK), and all the straw returned to the field with chemical fertilizer (S3NPK) 5 treatments.The results showed that soil organic carbon and total nitrogen content decreased with soil depth showed obvious stratification, soil available phosphorus and potassium content is only expressed in the topsoil (0-20cm) enrichment, and straw with fertilizer can improve the nutrient content of different soil layers under different levels of straw trentments. Spring Maize yield of S2NPK treatment was the highest,it increased 48.88% compared with CK treatment ,and was slightly higher than the NPK treatment for 0.68%. Chemical fertilizer can increase the yield of spring maize, but 1/2 straw returning amount with fertilizer has better effect. Straw returning is an effective measure of increasing production, but it is suggested that straw returning amount should be 50% in agricultural production.
Keywords: straw returning Spring maize nutrient yield
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No.4731675119881914****
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