关键词: 缓释肥, 小麦, 产量结构, 净效益

Abstract:

In order to improve the efficiency of fertilizer use and reduce the number of fertilization, seven different fertilization application patterns were set up in this experiment to explore the effects of slow-release fertilizer and urea basal application and sub-application on wheat growth and yield under the same nitrogen level. The results showed that the number of grains per panicle could be increased by one-time basal application of slow-release fertilizer, but the effective panicle number and 1000-grain weight decreased, and the cost increased, which was not conducive to increasing yield and efficiency. Slow-release fertilizer basal application combined with urea application at jointing stage can promote wheat panicle weight, increase aboveground dry matter accumulation, and improve nitrogen fertilizer use efficiency, which is conducive to increasing yield and efficiency. A 15% reduction in nitrogen would lead to an 8.81% decrease in yield compared with conventional fertilization, but it had a certain effect of reducing costs and increasing nitrogen efficiency compared with the one-time basal application of slow-release fertilizer.

Key words: slow-release fertilizer, wheat, yield structure, net benefit