气候变化领域集成服务门户(CCPortal): Optimizing the rate of straw returning to balance trade-offs between carbon emission budget and rice yield in China

CCPortal

DOI	10.1016/j.spc.2024.03.026
	Optimizing the rate of straw returning to balance trade-offs between carbon emission budget and rice yield in China
	Li, Ruo-Chen; Tian, Yu -Gang; Wang, Fan; Sun, Yuan-Feng; Lin, Bai-Jian; Dang, Yash Pal; Zhao, Xin; Zhang, Hai -Lin; Xu, Zhi-Yu
发表日期	2024
ISSN	2352-5509
起始页码	47
卷号	47
英文摘要	Rice paddies are a prominent contributor to greenhouse gases (GHGs) emissions, accounting for 22 % of the overall agricultural methane (CH4) emissions. Although returning rice straw to the field can increase yield and soil organic carbon (SOC), the significant GHGs released during this process often negate these positive effects. Thus, understanding the impact of straw returning on the relationship between rice yield and GHGs is crucial for farming adaptation and climate change mitigation. This study aims to investigate the effects of varying straw returning rates on rice yield and GHGs in China and identify the optimal rates on a provincial scale. This study utilized county-level meteorological, soil, and field management data. The Dynamic Nitrogen and Carbon Model (DNDC) model was used to simulate the impacts on rice yield, GHGs, and SOC changes under different straw returning rates in China from 2010 to 2022, including no straw, 1/3, 2/3, and full straw returning. The results showed that 1/3, 2/3, and full straw incorporation increased rice yield per unit area by 1.07 %, 2.25 %, and 3.26 % for single rice cropping, 1.10 %, 2.24 %, and 3.52 % for early rice, and 1.92 %, 3.91 %, and 5.95 % for late rice, respectively. Compared with no straw returning, the total SOC content (0-50 cm) increased by 3.88 % (78.07 Tg), 7.75 % (156.09 Tg), and 11.65 % (234.62 Tg) under 1/3, 2/3, and full straw returning, respectively. However, the total GHGs were increased by 23.32 %, 43.50 %, and 61.48 % for 1/3, 2/3, and full straw incorporation compared to no straw returning. While the overall benefits of straw returning varied across regions, in certain areas like northeastern China, Xinjiang, and Yunnan, an increase in straw returning rates leads to a significant increase in yield with a relatively smaller increase in GHGs. This can be attributed to factors such as lower temperatures, decreased SOC, and lower soil pH, restricting CH4 production. Conversely, in regions with higher soil pH, such as north China and the Sichuan Basin, as well as in warmer southern areas, the increase in GHGs is quite pronounced. In summary, implementing straw returning significantly increases rice production and SOC but simultaneously increases GHGs. In China, the most widespread utilization of rice straw remains straw returning. We have summarized the average impact of straw returning on yield, SOC, and GHGs, and proposed straw returning rates tailored to the comprehensive benefits in different regions, to enhance the carbon sequestration and emission reduction rate of rice straw returning.
英文关键词	Rice paddies; Crop straw returning; Greenhouse gas emission; Soil organic carbon; DNDC modeling
语种	英语
WOS研究方向	Science & Technology - Other Topics ; Environmental Sciences & Ecology
WOS类目	Green & Sustainable Science & Technology ; Environmental Studies
WOS记录号	WOS:001228502000001
来源期刊	SUSTAINABLE PRODUCTION AND CONSUMPTION
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/293894
作者单位	China Agricultural University; Ministry of Agriculture & Rural Affairs; Ministry of Agriculture & Rural Affairs; Ministry of Agriculture & Rural Affairs; University of Queensland
推荐引用方式 GB/T 7714	Li, Ruo-Chen,Tian, Yu -Gang,Wang, Fan,et al. Optimizing the rate of straw returning to balance trade-offs between carbon emission budget and rice yield in China[J],2024,47.
APA	Li, Ruo-Chen.,Tian, Yu -Gang.,Wang, Fan.,Sun, Yuan-Feng.,Lin, Bai-Jian.,...&Xu, Zhi-Yu.(2024).Optimizing the rate of straw returning to balance trade-offs between carbon emission budget and rice yield in China.SUSTAINABLE PRODUCTION AND CONSUMPTION,47.
MLA	Li, Ruo-Chen,et al."Optimizing the rate of straw returning to balance trade-offs between carbon emission budget and rice yield in China".SUSTAINABLE PRODUCTION AND CONSUMPTION 47(2024).