分蘖期水氮耦合对水稻常规种垦粳5号产量的影响

Effects of Water and Nitrogen Coupling on Yield of Rice Varieties Kenjing 5 in Tillering Stage

【目的】研究分蘖期水、氮耦合对水稻产量及产量构成因素的影响,找出水稻高产的最适宜水、肥施用量,为实现水稻节水节肥的栽培制度提供参考。【方法】采用完全随机设计,研究分蘖期5个不同的施氮水平和5个不同水分含量水平及它们的互作效应对垦粳5号杂交稻的农艺性状及产量的影响。【结果】在水层3cm,施氮量51.75kg/hm^2的处理下,垦粳5产量达到最高(7 640.5kg/hm^2)。【结论】土壤水分含量与氮肥水平对水稻产量有显著的互作效应,在氮肥不足的条件下增施适量的氮肥有助于水稻产量提高;施氮量过多,则造成水分胁迫,不利于增产。

【Objective】This test was aimed to study the effects of water and nitrogen coupling on rice yield and yield components in tillering stage,to find out the optimal water and fertilizer application rate for rice yield.In order to provide reference for the cultivation system of water and fertilizer saving.【Method】Study on the effects of 5different nitrogen fertilizer and 5different moisture content levels application amount of grain filling stage on the yield components and yield of kenjing 5by using randomized block design.【Results】Under the layer 3cm,N 51.75kg/hm^2,Kenjing 5theoretical yield reached the highest（7 640.5 kg/hm^2）.【Conclusion】The result showed that soil water content and nitrogen levels on rice yield had significant interaction effects,under the condition of nitrogen deficiency increases the amount of N fertilizer help to improve rice yield;Excessive nitrogen application,causing water stress,is not conducive to increase production.