数字农科院2.0

Ethylene stimulates methane oxidation and inhibits methane production in green manure-rice systems

文献类型： 外文期刊

作者： Jinxin Sun;Zhengbo Ma;Guopeng Zhou;Ting Liang;Rui Liu;Danna Chang;Han Liu;Jia Liu;Chunqin Zou;Weidong Cao

作者机构：

关键词： Aerenchyma;CH4;Ethylene;Green manure;Rice

期刊名称： Journal of Environmental Management

ISSN： 0301-4797

年卷期： 2025 年 383 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Green manure is effective for improving rice yields and soil quality, but it might result in increasing methane (CH4) emissions in paddy fields caused by its substantial organic matter. Finding approaches to mitigate CH4 emissions while guaranteeing grain yields are urgently needed. The impacts and underlying mechanisms of applying ethylene on CH4 emissions in milk vetch (MV)-rice pattern were explored. Field and pot experiments were carried out simultaneously for a 2 year with three treatments: no MV-rice (CK), MV-rice (GM), and MV-rice by applying ethylene when incorporating MV (GM + ETH). Planting MV (GM) effectively improved rice productivity but increased CH4 emissions relative to CK. Compared with GM, GM + ETH significantly reduced cumulative CH4 emissions by 39.6 %–52.9 % in a field experiment and by 44.4 % in a pot experiment. In the pot experiment indicated that applying ethylene had the highest aerenchyma ratio, which was 1.65 and 3.81 times higher than CK and GM treatments. Ethylene application improved soil CH4 oxidation potential by 7.5 % and diminished CH4 production potentials by 34.0 % relative to GM. The improvement of root aerenchyma facilitated oxygen release by 8.4 %–23.4 %, increased root oxidation activity by 16.4 %, and decreased the contents of soil reducing substances (including total reducing substance, active reducing substance, and Fe2+), leading to the increase of pmoA abundances by 39.7 % and the reduction mcrA abundances by 32.3 % when compared with GM, respectively. These findings provided solutions for improving the productivity by using green manure as well as controlling the CH4 emissions in paddy fields.

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