期刊论文

Effects of Reducing Nitrogen and Phosphorous Fertilizers on Rice Yield, Nitrogen and Phosphorus Losses in Paddy Field

中文

土壤

0253-9829

2020

52

02

311-319

10.13758/j.cnki.tr.2020.02.013

2018YFD0800500:国家重点研发计划 2019JJ50233:湖南省自然科学基金 2019JJ50337:湖南省自然科学基金

本校为第一机构

为探讨氮(N)、磷(P)减量对降低稻田养分地表径流损失风险的影响,以毛里湖稻区为研究对象,连续两年(2016—2017年)进行田间小区试验,研究化肥氮磷优化减施对水稻产量和生长期内田面水N、P动态变化特征及径流流失的影响。结果表明:常规施肥处理(CF)和有机替代20%化肥N处理(0.8FN+0.2ON)稻田田面水总氮(TN)、NH_4~+-N和总磷(TP)浓度在施肥后迅速达到峰值,之后逐渐下降。而控释氮肥减N处理能有效减缓N素释放速度,田面水N素流失量远低于CF处理,且磷肥减量处理TP流失量低于CF处理。与CF处理相比,控释氮肥减N 20%(0.8N)和控释氮肥+过磷酸钙减量20%(0.8NP)处理水稻两年平均分别增产5.55%、3.22%, N素累积...

To explore the effects of reducing nitrogen (N) and phosphorus (P) fertilizers on rice yield and runoff losses of N and P in paddy fields, a field plot experiment with different fertilization was conducted from 2016 to 2017 in the rice-planting area of Maoli Lake, the yield of rice, the variation of N and P in surface water, the runoff losses of N and P, and the use efficiencies of N and P fertilizers were monitored and compared after fertilization during the rice-growing period. The results showed that the concentrations of TN, NH_4~+-N and TP in surface water of paddy field under the treatme...