不同施肥处理对冬小麦-夏玉米产量及肥料效益的影响

目的]为了研究长期不同施肥处理对冬小麦-夏玉米连作产量和肥料效益的影响.方法]在4年长期定位试验定向培育的土壤平台上,采用田间试验与室内分析相结合的方法.结果]NPK配合施用的增产效果最明显；PK肥在早期有增产效果,但随着时间的推移,产量明显低于不施肥处理.试验地土壤的供氮能力则逐渐降低,供磷、供钾能力保持稳定,一直处于较高水平.肥料贡献率以NPK处理最高,NP、NK处理次之,PK处理最低.结论]长期NPK配合施用下冬小麦-夏玉米连作的产量和肥料效益最高.

Effects of Different Fertilizer Treatments on Yield and Fertilizer Efficiency of Wheat-Maize

Objective ] The research aimed to study the effects of continuous cropping yield and fertilizer efficiency of the winter wheat-sum- mer maize under different fertilizer treatments. Method ] The integrated research method of field experiment and laboratory analysis was car- fled out on the oriented cultivated soil under location test for four years. Result ] NPK treatment had the most significant effect on increasing production. PK treatment had effect on increasing production in early stage, but with time the production was lower than that without fertilizer. The agronomy efficiency of nitrogen fertilizer was the highest and increased gradually over time. The nitrogen supply capacity of experimental field soil gradually declined, while phosphorus, potassium supply capacity remained stable, and was at a high level. The contribution rate of fertilizer ranked the highest in NPK treatment, followed by NP, NK treatment, and the lowest was PK treatment. Conclusion] Under the long-term different fertilizer treatments, NPK treatment has the highest crop yield and fertilizer efficiency in the winter wheat-summer maize.