摘要
通过15 N同位素示踪技术,研究了不同水肥模式对稻田肥料氮淋溶损失、稻田氨挥发损失、水稻产量及其构成要素的影响。结果表明,等量施氮下,3次施肥的薄露灌溉和3次施肥的间歇灌溉下水稻产量分别提高18.7%和27.5%,肥料氮的淋溶和挥发损失分别降低16.6%和19.7%,有效减少了化肥对地下水、大气环境的污染,控制了农业面源污染。
The technology of isotope 15N tracer was used to evaluate the influences of different irrigationand fertilization modes on the percolation of fertilizer-N, volatilization of fertilizer-N in paddy field, yieldand its components. The results indicated that the rice yields were improved by 18.7% and 27.5%, whilefertilizer-N losses decreased by 16.6% and 19.7% under thin ＆ wet irrigation with nitrogen fertilizer ap-plication frequency of three times and intermittent irrigation with nitrogen fertilizer application frequencyof three times, respectively. The two irrigation modes could both reduce the pollution of fertilizer-N to theunderground water and air effectively.
出处
《灌溉排水学报》
CSCD
北大核心
2014年第3期107-109,共3页
Journal of Irrigation and Drainage
基金
水利部公益性行业科研专项(201301012)
关键词
水肥模式
肥料氮渗漏
肥料氮挥发
15N同位素
irrigation and fertilization mode
percolation of fertilizer-N
volatilization of fertilizer-N
isotope 15N
