气候变化领域集成服务门户(CCPortal): Soil carbon dioxide and methane emissions and carbon balance with crop rotation and nitrogen fertilization

CCPortal

DOI	10.1016/j.scitotenv.2021.145902
	Soil carbon dioxide and methane emissions and carbon balance with crop rotation and nitrogen fertilization
	Sainju U.M.; Ghimire R.; Dangi S.
发表日期	2021
ISSN	489697
卷号	775
英文摘要	Quantifying soil CO2 and CH4 emissions and C balance under dryland cropping systems in arid and semiarid regions is needed to understand their contributions to climate change. The objective of this study was to examine the effect of crop rotation and N fertilization rate on soil CO2 and CH4 fluxes and C balance under dryland farming from 2012 to 2016 in the northern Great Plains, USA. Treatments were two crop rotations (continuous spring wheat [Triticum aestivum L.], CW; and spring wheat-pea [Pisum sativum L.], WP) and four N fertilization rates (0, 50, 100, and 150 kg N ha−1) applied to spring wheat. The soil CO2 flux peaked immediately after planting, fertilization, and intense precipitation (>15 mm in a day) when the emissions varied among treatments. Treatment did not affect soil CH4 uptake, except that the uptake varied with N fertilization rate in 2015–2016. Cumulative annual soil CO2 flux was 35–55% greater with CW than WP at 50–150 kg N ha−1 in 2013–2014 and 2015–2016, but was 37% greater with WP than CW at 100 kg N ha−1 in 2014–2015. Mean cumulative soil CH4 flux was 34% greater with CW than WP at 0 kg N ha−1, but was 16% greater with WP than CW at 150 kg N ha−1. Yield-scaled soil CO2 and CH4 fluxes were unaffected (P > 0.05) by treatments, but varied among years. Carbon balance was negative and unaffected by treatments. Results showed that soil CO2 emissions can be reduced by using legume-nonlegume crop rotation with reduced N fertilization rate with limited impact on soil CH4 emissions. Dryland spring wheat-based cropping systems was a carbon source in the semiarid region. © 2021
英文关键词	Carbon budget; Crop yield; Cropping sequence; Dryland cropping systems; Greenhouse gas; Nitrogen application
scopus关键词	Arid regions; Carbon dioxide; Climate change; Crops; Nitrogen; Nitrogen fertilizers; Plants (botany); Rotation; Arid and semi-arid regions; Dryland cropping systems; Intense precipitation; Methane emissions; Nitrogen fertilization; Northern great plains; Soil carbon dioxide; Triticum aestivum; Soils; carbon balance; carbon budget; carbon dioxide; carbon emission; carbon flux; crop rotation; crop yield; cropping practice; dryland farming; fertilizer application; greenhouse gas; methane; nitrogen; soil carbon; Great Plains; Fabaceae; Pisum sativum; Triticum aestivum
来源期刊	Science of the Total Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177174
作者单位	US Department of Agriculture, Agriculture Research Service, Northern Plains Agricultural Research Laboratory, Sidney, MT, United States; New Mexico State University, Agricultural Science Center, Clovis, NM, United States
推荐引用方式 GB/T 7714	Sainju U.M.,Ghimire R.,Dangi S.. Soil carbon dioxide and methane emissions and carbon balance with crop rotation and nitrogen fertilization[J],2021,775.
APA	Sainju U.M.,Ghimire R.,&Dangi S..(2021).Soil carbon dioxide and methane emissions and carbon balance with crop rotation and nitrogen fertilization.Science of the Total Environment,775.
MLA	Sainju U.M.,et al."Soil carbon dioxide and methane emissions and carbon balance with crop rotation and nitrogen fertilization".Science of the Total Environment 775(2021).