原文服务方: 地球化学学报(英文)       
摘要:
Abstract Rice paddies are increasingly being converted to vegetable production due to economic benefits related, in part, to changes in demand during recent decades. Here, we implemented a parallel field experiment to simultaneously measure annual emissions of CH4 and N2O, and soil organic carbon (SOC) stock changes,in rice paddies (RP), rice paddy-converted conventional vegetable fields (CV), and rice paddy–converted greenhouse vegetable fields (GV). Changing from rice to vegetable production reduced CH4 emissions by nearly 100%, and also triggered substantial N2Oemissions. Furthermore, annual N2O emissions from GV significantly exceeded those from CV due to lower soil pH and higher soil temperature. Marginal SOC losses occurred after one year of cultivation of RP, CV, and GV, contributing an important share (3.4%, 32.2%, and 10.3%, respectively) of the overall global warming potential (GWP) balance. The decline in CH4 emissions outweighed the increased N2O emissions and SOC losses in CV and GV, leading to a 13%-30% reduction in annual GWP as compared to RP. These results suggest that large-scale expansion of vegetable production at the expense of rice paddies is beneficial for mitigating climate change in terms of the overall G WP.
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篇名 Effect on greenhouse gas balance of converting rice paddies to vegetable production
来源期刊 学科 地球科学
关键词 Greenhouse gas balance Land management change CH4 N2O Soil organic carbon
年,卷(期) 2022,(3) 所属期刊栏目
研究方向 页码范围 353-354
页数 1页 分类号
字数 语种 中文
DOI 10.1007/s11631-017-0152-8
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Greenhouse gas balance
Land management change
CH4
N2O
Soil organic carbon
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地球化学学报(英文)
双月刊
2096-0956
52-1161/p
16开
贵阳市林城西路99号
1982-01-01
英语
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