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| Effects of the rice-shrimp rotation system on water quality and aquatic microbial communities |
| Received:September 30, 2024 |
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| KeyWord:integrated rice-shrimp system;Litopenaeus vannamei;microbial community;functional prediction;environmental factors |
| Author Name | Affiliation | E-mail | | SUN Chao | School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China
Autonomous Region Collaborative Innovation Center for Ecological Protection and Comprehensive Utilization of Inner Mongolia Section of Yellow River Basin, Baotou 014010, China | | | QU Zhongyi | School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China
Autonomous Region Collaborative Innovation Center for Ecological Protection and Comprehensive Utilization of Inner Mongolia Section of Yellow River Basin, Baotou 014010, China | QZY19690101@163.com | | YU Xinrui | College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China | | | WANG Yu | School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China
Autonomous Region Collaborative Innovation Center for Ecological Protection and Comprehensive Utilization of Inner Mongolia Section of Yellow River Basin, Baotou 014010, China | | | REN Enliang | Autonomous Region Collaborative Innovation Center for Ecological Protection and Comprehensive Utilization of Inner Mongolia Section of Yellow River Basin, Baotou 014010, China
College of Mining and Coal, Inner Mongolia University of Science and Technology, Baotou 014010, China | | | LI Weiping | School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou 014010, China
Autonomous Region Collaborative Innovation Center for Ecological Protection and Comprehensive Utilization of Inner Mongolia Section of Yellow River Basin, Baotou 014010, China | |
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| Abstract: |
| To elucidate the characteristics of water quality and microbial communities in Litopenaeus vannamei cultivation under integrated rice-shrimp systems（IMRS）and monoculture systems in saline-alkaline conditions, water samples were collected from IMRS ponds and shrimp monoculture ponds between June 4 and September 20, 2023. Comparative analyses of aquatic parameters and microbial community composition and functionality were conducted. The results demonstrated that during the culture period, the average concentrations of TN, NH4+-N, NO3--N, NO2--N, TP, and COD in the IMRS ponds were reduced by 42.65%, 51.37%, 42.89%, 57.40%, 28.85%, and 32.37%, respectively, compared with the control ponds throughout the culture process. IMRS ponds showed significantly enhanced microbial α-diversity and richness relative to controls.The dominant bacterial phyla in both the IMRS ponds and control ponds were Firmicutes, Proteobacteria, Cyanobacteria, and Actinobacteria. IMRS ponds displayed significantly higher relative abundances of Proteobacteria, Actinobacteria, and Bacteroidota. At the genus level, Psychrobacter predominated in IMRS ponds, whereas Microbacterium showed reduced abundance compared to controls. Functional annotation revealed substantial increases in chemoheterotrophic and aerobicchemoheterotrophic metabolic pathways in IMRS ponds during mid-late cultivation stages, significantly exceeding control levels（P＜0.05）. Redundancy analysis（RDA）identified TN, TP, salinity, and NH4+-N as key determinants of microbial community variation. Notably, supplementation with effective microorganisms enhanced structural optimization of aquatic microbiota.In conclusion, the saline-alkaline IMRS effectively improves water quality and sustains the homeostasis of the aquatic environment during the culture period. |
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