关键词: 水稻, 氮肥, 肥料利用率

Abstract:

How to improve fertilizer utilization efficiency, reduce the increase of production cost and environmental pollution caused by excessive and improper application of chemical fertilizer has been a common concern of all countries. In order to meet the need of the development strategy of “one control, two reduction and three basic”, and solve the problem of low fertilizer utilization rate at present in China as soon as possible, the authors systematically summarizes the results of the related fertilizer utilization test conducted in 2015—2016 in this paper. The results showed that nitrogen application rate was 270~300 kg/hm2, the proportion of base fertilizer, tiller fertilizer and panicle fertilizer was 2.4∶3.6∶4.0, and apply fertilizer at the stage of inverted 3 leaf is a suitable way. It could not only ensure enough number of panicles, but also strive for more grain number per panicle to achieve high yield.

Key words: rice, nitrogen fertilizer, fertilizer use efficiency