气候变化领域集成服务门户(CCPortal): Contribution of rice variety renewal and agronomic innovations to yield improvement and greenhouse gas mitigation in China

CCPortal

DOI	10.1088/1748-9326/ab488d
	Contribution of rice variety renewal and agronomic innovations to yield improvement and greenhouse gas mitigation in China
	Zhang Y.; Jiang Y.; Tai A.P.K.; Feng J.; Li Z.; Zhu X.; Chen J.; Zhang J.; Song Z.; Deng A.; Lal R.; Zhang W.
发表日期	2019
ISSN	17489318
卷号	14 期号:11
英文摘要	China's rice agriculture, a primary source of greenhouse gases (GHGs), has experienced great changes in the last five decades due to changes in dominant varieties and farming practices. However, the impacts of these changes on GHG emissions have not been comprehensively assessed. While most earlier studies focused on the GHG emissions per unit area, recent research indicated that the yield-scaled impact may better reflect the reality. Through integrating the results from a meta-analysis, two multi-site field experiments and an expert survey, we quantify the integrated impacts of different practices on both area- and yield-scaled GHG emissions in China. Results from the expert survey showed that rice planting area has shifted northwards, and alternate water-saving (WS) irrigation has been applied in nearly 78% of Chinese rice paddy areas in both the rice nursery stage and post-transplanting period over the past five decades. The changes of these practices and replacement of new rice varieties have increased China's rice yield by 131%. During the same period, cropping system adjustment, variety replacement, and implementation of WS irrigation have reduced total GHG emissions by 7%, 31%, and 42%, respectively. Also, the major decrease in GWP occurred prior to the 2000s, and the decreasing trend continued in the post-2000s period but at a slower rate. Our results have some limitations as these estimates ignore a number of important variations and interactions among management factors as well as climatic and edaphic conditions. Still, our findings illustrate that it is possible to enhance rice productivity at reduced environmental costs through screening for low emission varieties and agronomic practices. Future innovations should ensure that rice farming progressively adapts to climate change, while continuing to reduce GHG emissions. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	agronomic practice; climate change; food security; greenhouse gas mitigation; rice production
语种	英语
scopus关键词	Agricultural robots; Agronomy; Climate change; Food supply; Irrigation; Surveys; Water conservation; Agronomic practices; Edaphic conditions; Environmental costs; Food security; Future innovations; Greenhouse gas mitigation; Management factors; Rice production; Greenhouse gases; agronomy; climate change; crop performance; field method; greenhouse gas; high yielding variety; irrigation system; rice; yield response; China
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154784
作者单位	College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China; Jiangsu Collaborative Innovation Center for Modern Crop Production, National Engineering and Technology Center for Information Agriculture, Key Laboratory of Crop Physiology and Ecology in Southern China, Nanjing Agricultural University, Nanjing, 210095, China; Earth System Science Programme, State Key Laboratory of Agrobiotechnology, Institute of Environment, Energy and Sustainability, Chinese University of Hong Kong, Hong Kong; China National Rice Research Institution, Hangzhou, 310006, China; Aijin Agricultural Science and Technology Service Co., Ltd., Nanjing, 211515, China; Department of Agronomy, College of Life Science and Environmental Resources, Yichun University, Yichun, Jiangxi, 336000, China; Soil and Fertilizer and Resources and Environmental Institute, Jiangxi Academy of Agricultural Science, Nanchang, 330200, China; Institute of Crop Science, Chinese Academy of Agricultural Sciences, Mi...
推荐引用方式 GB/T 7714	Zhang Y.,Jiang Y.,Tai A.P.K.,et al. Contribution of rice variety renewal and agronomic innovations to yield improvement and greenhouse gas mitigation in China[J],2019,14(11).
APA	Zhang Y..,Jiang Y..,Tai A.P.K..,Feng J..,Li Z..,...&Zhang W..(2019).Contribution of rice variety renewal and agronomic innovations to yield improvement and greenhouse gas mitigation in China.Environmental Research Letters,14(11).
MLA	Zhang Y.,et al."Contribution of rice variety renewal and agronomic innovations to yield improvement and greenhouse gas mitigation in China".Environmental Research Letters 14.11(2019).