1.华中农业大学植物科学技术学院,武汉 430070
2.华中农业大学双水双绿研究院,武汉 430070
3.华中农业大水产学院,武汉 430070
刘银涛,E-mail:liuyintao@webmail.hzau.edu.cn
刘娟,E-mail:LiuJuan@mail.hzau.edu.cn
江洋,E-mail:jiangyang@mail.hzau.edu.cn
收稿:2024-09-20,
纸质出版:2025-05-06
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刘银涛,王晓东,曹凑贵,等.稻-鸭-虾模式对稻田生态系统碳排放及碳固定的影响研究[J].华中农业大学学报,2025,44(3):38‐44.
LIU Yintao,WANG Xiaodong,CAO Cougui,et al.Effects of farming models of rice-duck-crayfish on carbon emissions and carbon sequestration in rice paddy ecosystems[J].Journal of Huazhong Agricultural University,2025,44(03):38-44.
刘银涛,王晓东,曹凑贵,等.稻-鸭-虾模式对稻田生态系统碳排放及碳固定的影响研究[J].华中农业大学学报,2025,44(3):38‐44. DOI: 10.13300/j.cnki.hnlkxb.2025.03.005.
LIU Yintao,WANG Xiaodong,CAO Cougui,et al.Effects of farming models of rice-duck-crayfish on carbon emissions and carbon sequestration in rice paddy ecosystems[J].Journal of Huazhong Agricultural University,2025,44(03):38-44. DOI: 10.13300/j.cnki.hnlkxb.2025.03.005.
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CH
4
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CH
4
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/hm
2
。与稻-虾种养相比,稻-鸭-虾模式的CH
4
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/hm
2
。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。
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 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 t
he 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 CH₄ 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 reduction of emissions and the sequestration of carbon.
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