华中农业大学学报2025，Vol.44Issue(3)：53-64,12.DOI:10.13300/j.cnki.hnlkxb.2025.03.007
稻-鸭-虾种养模式中浮游植物群落结构特征及其与环境因子的关系
Community structure of phytoplankton and its relationship with environmental factors in rice-duck-crayfish integrated model
摘要
Abstract
To accurately manage precise feeding and water quality regulation in the rice-duck-crayfish integrated model(RDCI),continuous monitoring of phytoplankton and physicochemical parameters in the water was conducted from March 2023 to January 2024 in both the RDCI and the rice-crayfish continuous culture model(RCCC).This study aimed to investigate the community structure characteristics of phyto-plankton and their relationships with environmental factors in the RDCI system.The results showed that a total of 214 species from 8 phyla of phytoplankton were found in the RDCI,which is higher than the 196 species from 8 phyla in the RCCC.Both systems were predominantly composed of Chlorophyta,Bacillari-ophyta,and Euglenophyta.The RDCI had 18 dominant species(Y≥0.02),more than the 14 in the RCCC.The density of phytoplankton in RDCI ranged from 0.52×108 to 2.19×108 ind/L,with the maxi-mum observed in June and the minimum in April.The biomass ranged from 3.10 to 29.41 mg/L,with the maximum in May and the minimum in July.The annual mean values for the phytoplankton Margalef rich-ness index,Pielou evenness index,and Shannon-Wiener diversity index were 2.45,0.67,and 1.15,re-spectively.Compared with RCCC,the density of phytoplankton in RDCI was lower during the crayfish farming and overwintering stages,while the biomass and diversity indices of phytoplankton were higher dur-ing the crayfish farming,overwintering,and rice maturity stages.The redundancy analysis results showed that the dominant species of phytoplankton in RDCI were influenced by water temperature,dissolved oxy-gen,total nitrogen,and total phosphorus.In summary,compared with RCCC,RDCI exhibits higher phy-toplankton diversity and better evenness,suggesting a more complex and stable community structure.The species composition of phytoplankton and related indices indicate that RDCI mitigates the degree of eutro-phication in water during both the shrimp farming and the overwintering stages,while increasing nutrients levels during the rice planting stage.This approch is benificial for reducing non-point source pollution in ag-riculture and promoting green agricultural development.关键词
稻-鸭-虾种养模式/浮游植物/群落结构/生物多样性/冗余分析/环境因子Key words
rice-duck-crayfish integrated model/phytoplankton/community structure/diversity/re-dundancy analysis/environmental factor分类
农业科技引用本文复制引用
荆煜宸,徐智威,顾泽茂..稻-鸭-虾种养模式中浮游植物群落结构特征及其与环境因子的关系[J].华中农业大学学报,2025,44(3):53-64,12.基金项目
湖北洪山实验室重大项目(2021HSZD002) （2021HSZD002）
国家重点研发计划项目(2022YFD2400700) （2022YFD2400700）
国家自然科学基金项目(32270481) （32270481）
湖北省第四批现代农业产业技术体系水产产业技术体系项目(2023HBSTX4-05) （2023HBSTX4-05）
湖北省农业科技创新中心项目(2025-621-000-001-029) （2025-621-000-001-029）
