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44 华 中 农 业 大 学 学 报 第 44 卷

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Effects of farming models of rice-duck-crayfish on carbon emissions
and carbon sequestration in rice paddy ecosystems

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LIU Yintao ,WANG Xiaodong ,CAO Cougui ,WANG Jinping ,GU Zemao ,LIU Juan ,JIANG Yang 1,2
1.College of Plant Science and Technology，Huazhong Agricultural University，Wuhan 430070，China；
2.Shuangshui Shuanglü Institute，Huazhong Agricultural University，Wuhan 430070，China；
３.College of Fisheries，Huazhong Agricultural University，Wuhan 430070，China
Abstract The characteristics of carbon emission and carbon sequestration under different farming
models of rice-duck-crayfish were compared with those under the traditional farming model of single rice
cropping and rice-crayfish farming.The rice variety Huamoxiang 5，the crayfish（Procambarus clarkii），and
duck variety Wuqin No.10 were used to conduct a field experiment at the Shuangshui Shuanglü Institute
Base of Huazhong Agricultural University in Jingzhou，Hubei Province.The effects of different farming mod‐
els on the methane （CH ₄） emission，nitrous oxide （N ₂ O） emission，global warming potential （GWP），
greenhouse gas emission intensity （GHGI），and carbon sequestration potential in paddy fields were studied.
The results showed that the CH₄ emissions，GWP，and GHGI under the farming model of rice-duck-cray‐
fish reduced by 28.1% to 32.1%，27.0% to 30.7%，23.0% to 26.7%，while the carbon sequestration in‐
creased by 2 089 to 2 569 kg/hm² compared to that under the traditional model of single rice cropping.The
CH ₄ emissions，GWP，and GHGI under the farming model of rice-duck-crayfish reduced by 18.6% to
23.1%，17.9% to 22.2%，and 18.7% to 22.0%，while the carbon sequestration increased by 616 to 1 096
kg/hm² compared to that under the rice-crayfish farming model.It is indicated that the farming model of
rice-duck-crayfish can reduce carbon emissions and increase the level of carbon neutrality in rice paddy
fields，with the farming model of rice-duck-crayfish in large field blocks having the best effects on the reduc‐
tion of emissions and the sequestration of carbon.
Keywords ecological farming of rice-duck-crayfish； integrated farming in paddy field； carbon emis‐
sion； carbon sequestration； CH 4 emissions； N 2O emissions
（责任编辑：张志钰）