数字农科院2.0

Impact of rice-crab and rice-fish co-cultures on the methane emission and its transport in aquaculture ponds

文献类型： 外文期刊

作者： Yang, Tong;Wang, Xiaodan;Wang, Mengjie;Li, Fengbo;Barthel, Matti;Six, Johan;Feng, Jinfei;Fang, Fuping

作者机构：

关键词： Aquaculture ponds;Methane;Food;Rice;Co-culture system;CH4 ebullition

期刊名称： AGRICULTURE ECOSYSTEMS & ENVIRONMENT

ISSN： 0167-8809

年卷期： 2024 年 378 卷

页码：

收录情况： SCIE（2024版）

摘要： Aquaculture ponds are as hotspots for methane (CH4) emissions of increased worldwide interest. However, management strategies and underlying mechanisms to mitigate CH4 emissions from aquaculture ponds remain little explored. In this study, we constructed new rice-crab and rice-fish co-culture systems by planting rice in crab and fish ponds and conducted a 2-year field experiment to examine the effect of co-culture on CH4 emissions and transport pathways. The results showed that compared with crab and fish monoculture, co-culturing with rice significantly reduced CH4 emissions by 23.1 % and 23.7 % for crab and fish ponds over 2 years, respectively. Further analysis clarified that the mitigating effect of co-culturing with rice on CH4 emissions resulted from the reduction of CH4 ebullition from the stocking ditch, but not from the feeding platform. The effect of co-culturing with rice on CH4 transport varied by functional areas. No significant effect of co-culture was found on diffusive CH4 emission neither in the stocking ditch nor on the feeding platform. On the feeding platform, co-culture increased additional rice-mediated CH4 emissions while it mitigated CH4 ebullition under the combined effect of planting rice on CH4 production and oxidation. In the stocking ditch, co-culture significantly reduced CH4 ebullition by reducing sediment depth. Furthermore, co-culture obtained additional rice yields, leading to lower yield-scaled CH4 and higher economic effects. These findings highlight that co-culturing with rice is a valuable solution for sustainable aquaculture development by reducing CH4 emissions while increasing food production.

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