Optimization of nitrogen fertilizer rate under integrated ri

发布时间：2021-10-21 17:02

　　China has the world’s highest nitrogen（N） application rate, and the lowest N use efficiency（NUE）. With the crop yield increasing, serious N pollution is also caused. An in-situ field experiment（2011–2015） was conducted to examine the effects of three N levels, 0（i.e., no fertilizer N addition to soil）, 120, and 180 kg N ha^-1, using integrated rice management（IRM）. We investigated rice yield, aboveground N uptake, and soil surface N budget in a hilly region of Southwest China. Compared... 

【文章来源】：Pedosphere. 2020,30(06)SCICSCD

【文章页数】：10 页

【文章目录】：
INTRODUCTION
MATERIALS AND METHODS
    Site characteristics
    Sampling and analyses
    Statistical analysis
RESULTS
    Biomass and N uptake of rice grain and straw
    Nitrogen use efficiency and15N recovery efficiency
    Replenishing effect of fertilizer N on soil N consumption and soil surface budget
DISCUSSION
    Increased rice production under IRM
    Improved NUE and15N recovery efficiency under IRM
    Reduced soil surface N surplus under IRM
    Optimization of N fertilizer rate
CONCLUSIONS



本文编号：3449385