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| Effects of lobster species and breeding density on CH4 and N2O emissions under rice shrimp co-cropping |
| Received:November 17, 2022 Revised:March 11, 2023 |
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| KeyWord:rice-shrimp co-cropping;greenhouse gases;global warming potential;breeding density |
| Author Name | Affiliation | E-mail | | LUO Jiawei | College of Resources and Environment, Anhui Agricultural University/Anhui Engineering and Technology Research Center of Intelligent Manufacture and Efficient Utilization of Green phosphorus Fertilizer/Key Laboratory of Farmland Ecological Conservation and Pollution Prevention/Key Laboratory of Jianghuai Arable Land Resources Protection and Eco-restoration, Hefei 230036, China | | | QIAN Kaiguo | College of Resources and Environment, Anhui Agricultural University/Anhui Engineering and Technology Research Center of Intelligent Manufacture and Efficient Utilization of Green phosphorus Fertilizer/Key Laboratory of Farmland Ecological Conservation and Pollution Prevention/Key Laboratory of Jianghuai Arable Land Resources Protection and Eco-restoration, Hefei 230036, China | | | XU Bo | College of Resources and Environment, Anhui Agricultural University/Anhui Engineering and Technology Research Center of Intelligent Manufacture and Efficient Utilization of Green phosphorus Fertilizer/Key Laboratory of Farmland Ecological Conservation and Pollution Prevention/Key Laboratory of Jianghuai Arable Land Resources Protection and Eco-restoration, Hefei 230036, China | | | LI Hongying | Institute of Soil and Fertilizer, Anhui Academy of Agricultural Sciences, Hefei 230001, China | | | LIU Shaojun | National Agricultural Technology Extension Service Center, Beijing 100125, China | | | XIONG Qizhong | College of Resources and Environment, Anhui Agricultural University/Anhui Engineering and Technology Research Center of Intelligent Manufacture and Efficient Utilization of Green phosphorus Fertilizer/Key Laboratory of Farmland Ecological Conservation and Pollution Prevention/Key Laboratory of Jianghuai Arable Land Resources Protection and Eco-restoration, Hefei 230036, China | | | LI Shuo | College of Resources and Environment, Anhui Agricultural University/Anhui Engineering and Technology Research Center of Intelligent Manufacture and Efficient Utilization of Green phosphorus Fertilizer/Key Laboratory of Farmland Ecological Conservation and Pollution Prevention/Key Laboratory of Jianghuai Arable Land Resources Protection and Eco-restoration, Hefei 230036, China | | | SUN Ruibo | College of Resources and Environment, Anhui Agricultural University/Anhui Engineering and Technology Research Center of Intelligent Manufacture and Efficient Utilization of Green phosphorus Fertilizer/Key Laboratory of Farmland Ecological Conservation and Pollution Prevention/Key Laboratory of Jianghuai Arable Land Resources Protection and Eco-restoration, Hefei 230036, China | | | ZHANG Chaochun | College of Resources and Environment, Anhui Agricultural University/Anhui Engineering and Technology Research Center of Intelligent Manufacture and Efficient Utilization of Green phosphorus Fertilizer/Key Laboratory of Farmland Ecological Conservation and Pollution Prevention/Key Laboratory of Jianghuai Arable Land Resources Protection and Eco-restoration, Hefei 230036, China | | | YE Xinxin | College of Resources and Environment, Anhui Agricultural University/Anhui Engineering and Technology Research Center of Intelligent Manufacture and Efficient Utilization of Green phosphorus Fertilizer/Key Laboratory of Farmland Ecological Conservation and Pollution Prevention/Key Laboratory of Jianghuai Arable Land Resources Protection and Eco-restoration, Hefei 230036, China | xxye@ahau.edu.cn |
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| Abstract: |
| To explore the effects of different lobster species and breeding density on greenhouse gas(GHG)emissions in rice shrimp cocropping system. In this study, the effects of rice shrimp co-cropping on fluxes of CH4, N2O, and global warming potential (GWP) were studied using the closed static chamber method. The results indicated that seasonal patterns of CH4 and N2O fluxes were similar in each treatment, e. g., rice monoculture(DZ), rice co-cropping with Cherax quadricarinatus(DA), rice co-cropping with low-density Procambarus clarkii(DD), and rice co-cropping with high-density Procambarus clarkii(DG). The CH4 and N2O fluxes peaked in the jointing stage. The cumulative CH4 emissions were in order of DZ＞DA＞DD＞DG. The cumulative N2O emission followed the order of DG＞ DD＞DA＞DZ. Compared with DZ, the GWP in DG, DD, and DA treatments decreased by 36.9%, 30.7%, and 18.1%, respectively. Soil Eh as well as concentrations of dissolved oxygen, ammonium, and nitrate were negatively correlated with CH 4 emissions(P＜0.05), but positively correlated with N2O emissions(P＜0.05). Rice and shrimp co-cropping reduced CH4 emissions, increased N2O emissions, and decreased GWP. Moreover, the DG treatment was most effective in reducing GWP. The selection of lobster species and breeding density within a riceshrimp co-cropping system should be considered to reduce greenhouse gas emissions more effectively in a paddy field system. |
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