Responses of Nitrogen Utilization and Apparent Nitrogen Loss to Different Control Measures in the Wheat and Maize Rotation System

文献类型： 外文期刊

第一作者： Peng, Zhengping

作者： Peng, Zhengping;Liu, Yanan;Wang, Yanqun;Men, Mingxin;Li, Yingchun;Abawi, Yahya;Duc-Anh An-Vo;Duc-Anh An-Vo

作者机构：

关键词： apparent nitrogen loss;maize;net income;nitrogen efficiency;nitrogen fertilizer measures;wheat

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2017 年 8 卷

页码：

收录情况： SCI

摘要： Nitrogen (N) is an essential macronutrient for plant growth and excessive application rates can decrease crop yield and increase N loss into the environment. Field experiments were carried out to understand the effects of N fertilizers on N utilization, crop yield and net income in wheat and maize rotation system of the North China Plain (NCP). Compared to farmers' N rate (FN), the yield of wheat and maize in reduction N rate by 21-24% based on FN (RN) was improved by 451 kg ha(-1), N uptakes improved by 17 kg ha(-1) and net income increased by 1671 CNY ha(-1), while apparent N loss was reduced by 156 kg ha 1. The controlled-release fertilizer with a 20% reduction of RN (CRF80%), a 20% reduction of RN together with dicyandiamide (RN80% + DCD) and a 20% reduction of RN added with nano-carbon (RN80% + NC) all resulted in an improvement in crop yield and decreased the apparent N losses compared to RN. Contrasted with RN80% C NC, the total crop yield in RN80% C DCD improved by 1185 kg ha(-1), N uptake enhanced by 9 kg ha(-1) and net income increased by 3929 CNY ha(-1), while apparent N loss was similar. Therefore, a 37-39% overall decrease in N rate compared to farmers plus the nitrification inhibitor, DCD, was effective N control measure that increased crop yields, enhanced N efficiencies, and improved economic benefits, while mitigating apparent N loss. There is considerable scope for improved N use effieincy in the intensive wheat -maize rotation of the NCP.

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