The influence of straw returning on N2O emissions from a maize-wheat field in the North China Plain

被引：0
|
作者：
Zhou, Yizhen [1 ,3 ]
Zhang, Yuanyuan [1 ,3 ]
Tian, Di [1 ,3 ]
Mu, Yujing [1 ,2 ,3 ]
机构：
[1] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China
[2] Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
SCIENCE OF THE TOTAL ENVIRONMENT | 2017年 / 584卷
基金：
中国国家自然科学基金;
关键词：
Nitrous oxide; Soil moisture; Straw returning; North China Plain; NITROUS-OXIDE EMISSIONS; GREENHOUSE-GAS EMISSIONS; CROPPING SYSTEM; NITRIFIER DENITRIFICATION; FERTILIZER; SOIL; RESIDUES; ECOSYSTEMS; BIOCHAR; FLUXES;
D O I：
10.1016/jscitotenv.2017.01.141
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Crop straw returning has become a prevailing cultivation practice in the vast area of the North China Plain (NCP), while few investigations about its influence on nitrous oxide (N2O) emission have been conducted, In this study, N2O emissions from an agricultural field in the NCP with and without straw returning were comparably investigated by using static chambers in two consecutive maize-wheat growing seasons from June 2010 to June 2012. Compared with the NP treatment (compound nitrogen fertilizer only), the cumulative N2O emission from the SP treatment (compound nitrogen fertilizer plus straw) increased about 150% during the maize season in 2010, but decreased by about 35% during the maize season in 2011. The inconsistent influence of straw returning on N2O emission from the maize field was ascribed to the evidently different soil moisture between the two years, which was further confirmed by laboratory simulation experiments. About 40% reduction of N2O emission from the SP treatment during the two winter wheat seasons, which was mainly attributed to anoxic condition induced by rotting the maize straw. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：935 / 941
页数：7
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