【摘要】 为探究不同稻-鸭-虾种养模式与水稻单作模式和传统稻-虾种养模式的碳排放及碳固定特征差异，于湖北省荆州市华中农业大学双水双绿研究基地开展大田试验，以水稻品种华墨香5号、克氏原螯虾（Procambarus clarki）、肉鸭武禽10号为试验材料，研究水稻单作（monoculture,CK1）模式、稻-虾种植（rice-crayfish coculture,CK2）、稻-鸭-虾单元格投放（rice-duck-crayfish unit release model,CRXD）、稻-鸭-虾“游牧鸭”（rice-duckcrayfish“nomadic duck”model,NRXD）、稻-鸭-虾大田块（rice-duck-crayfish large field block model,BRXD）共5种养模式下稻田甲烷（methane,CH₄）、氧化亚氮（nitrous oxide,N₂O）排放、全球增温潜势（global warming potential,GWP）、温室气体排放强度（greenhouse gas emission intensity,GHGI）以及碳固定潜力。结果显示，相比传统水稻单作模式，稻-鸭-虾模式降低了稻田CH₄排放、GWP、GHGI，碳中和效应显著增加。与水稻单作相比，稻-鸭-虾模式CH₄的排放量降低了28.1%～32.1%,GWP降低了27.0%～30.7%,GHGI降低了23.0%～26.7%，碳固定增加了2 089～2 569 kg/hm²。与稻-虾种养相比，稻-鸭-虾模式的CH₄排放量降低了18.6%～23.1%,GWP降低了17.9%～22.2%,GHGI下降18.7%～22.0%，碳固定增加了616～1 096 kg/hm²。结果表明，稻-鸭-虾模式可以降低稻田碳排放量，提高稻田碳中和潜力，其中稻-鸭-虾大田块模式固碳减排效果最佳。更多还原

【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 ShuanglüInstitute Base of Huazhong Agricultural University in Jingzhou,Hubei Province.The effects of different farming models on the methane （CH₄） emission,nitrous oxide （N₂O） 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-crayfish reduced by 28.1%to 32.1%,27.0%to 30.7%,23.0%to 26.7%,while the carbon sequestration increased 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 096kg/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 reduction of emissions and the sequestration of carbon.更多还原