粮油轮作中施肥对产量和土壤肥力的影响

采用田间定位方法连续4年研究钾肥、有机肥对产量和土壤耕层化学性质的影响,结果表明,油菜—夏玉米—冬小麦—夏玉米轮作连续4年施钾仍有显著的增产作用,玉米平均增产447kg/hm2,油菜240kg/hm2。有机肥对3种作物有显著增产作用,玉米平均增产538kg/hm2,油菜286kg/hm2,小麦353kg/hm2。夏玉米施有机肥比油菜、小麦增产显著,土娄土施有机肥土壤钾素收支基本平衡。

Influence of fertilization on yield and soil fertility in grain and oil rape rotation

The method of fixed-site field on continuousy for 4 years was adopted in the experiment for the study of potassium fertilizer and organic manure application on the effect of yeild and soil chemical properties of cultivate layer. The result showed it still had significant effect on corn and oil rape yield increament in the oil rape-summer corn -winter wheat-summer corn rotation with potash appolication continuousty for 4 years. The yield average increasement of the corn was 447 kg/hm~2, the oil rape was 240 kg/hm~2. The result also showed the organic manure had significant effect on 3 crops yield increament. The corn average was 538 kg/hm~2, the oil rape was 285 kg/hm~2,the wheat was 353 kg/hm~2. The yield increament of summer corn with organic manure had significant effect than oil rape and wheat. The input and out put of soils K in manual Loessial soil was nearly equal.