湿润灌溉栽培方式下晚稻的适宜施氮量

摘要

Hybrid rice Shengtaiyou 018 was used to investigate the suitable N application of late-rice using the water sav-ing cultivation technology. Under the condition of moistening irrigation,five N application rate treatments:75. 0,112. 5, 150. 0,187. 5 and 225. 0 kg/hm2 ,were used to research the influence of different fertilization methods on rice root、leaf group quality and yield formation,and the relationships between them,to screen out relatively optimal fertilization technolo-gy. Results showed that:under the condition of this research,the fertilization of mid -nitrogen level (150. 0 kg/hm2 ) could control the rice to construct more reasonable root and leaf group structure,and gain higher economic yield and N fer-tilizer utilization rate. It’s the relatively optimal nitrogen application rate which showed the best effect on rice production a-mong the treatments in this experiment.%为探索节水栽培的晚稻适宜施肥量，以‘盛泰优018’为材料，在湿润灌溉条件下，通过5种不同施氮量处理：75.0、112.5、150.0、187.5和225.0 kg／hm2，研究不同施氮量对水稻根、叶群体质量和产量形成的影响及相互关系，以筛选出相对最优的施氮水平。结果表明：在本研究条件下，中等施氮水平（150.0 kg／hm2）能够调控水稻构建出较合理的根、叶群体结构，获得较高的经济产量，同时N肥利用率也相对较高，为本试验中增产效果相对最优的晚稻适宜施氮量。