中国生态农业学报（中英文）2025，Vol.33Issue(4)：737-748,12.DOI:10.12357/cjea.20240265
新型水稻-罗氏沼虾轮作模式对复垦土壤理化性质、养分供应及微生物多样性的影响
Effects of a new rice-Macrobrachium rosenbergii rotation model on reclaimed soil physicochemical properties,nutrient supply,and microbial diversity
摘要
Abstract
This study aims to investigate the impact of the newly established rice-Macrobrachium rosenbergii rotation system on physicochemical properties,nutrient supply capacity,and microbial diversity of reclaimed soil,and finally to objectively evaluate the comprehensive economic and ecological benefits of this system.This study examined the physical properties,reducing substances,total and available nutrients,and microflora structure of soil layers(0-20 cm and 20-40 cm)at three different production stages(be-fore shrimp stock,after shrimp harvest,and after rice harvest)of the rotation system by field sampling,laboratory chemical analysis,and high-throughput sequencing.The results indicated a significant decrease in the proportion of＞2 mm soil aggregates in 0-20 mm compared to that in 20-40 cm soil after shrimp harvest and rice harvest(P＜0.05).Soil bulk density,0.25-2 mm,and＜0.25 mm soil aggregates were all higher than those before shrimp stock.The soil reduction index in the 20-40 cm layer after shrimp harvest was significantly higher than that in the 0-20 cm layer(P＜0.05).Additionally,the contents of organic reducing substances,Fe2+and Mn2+after shrimp and rice harvests were significantly higher than those before shrimp harvest(P＜0.05).The total and available nutrients contents in the 0-20 cm soil layer were higher than those in the 20-40 cm soil layer.Furthermore,the contents of soil organic matter and total and available nutrients followed the order:after shrimp harvest＞after rice harvest＞before shrimp stock.Additionally,the contents of organic matter,total nitrogen,and total phosphorus in the soil after shrimp harvest were significantly higher than those be-fore shrimp stock(P＜0.05).The number of operational taxonomic units after shrimp and rice harvests was significantly higher than that before shrimp stock(P＜0.05).Hence,the newly established rice-M.rosenbergii rotation model is advantageous for enhancing the physical structure of topsoil,boosting soil buffer capacity,increasing nutrient supply,and enhancing microbial diversity.However,while the improvement effects were more pronounced in the 0-20 cm surface layer than in the 20-40 cm soil layer,there is also a po-tential risk of soil secondary compaction.The findings of this study serve as a theoretical foundation for optimizing rice and shrimp farming strategies to maximize economic and ecological benefits.关键词
新型稻-罗氏沼虾轮作/土壤物理性质/还原性物质含量/土壤养分/菌群结构Key words
rice-Macrobrachium rosenbergii rotation/soil physical properties/reducing substance content/soil nutrients/microbial flora structure分类
农业科技引用本文复制引用
刘梅,周聃,张艳,倪蒙,邹松保,原居林..新型水稻-罗氏沼虾轮作模式对复垦土壤理化性质、养分供应及微生物多样性的影响[J].中国生态农业学报（中英文）,2025,33(4):737-748,12.基金项目
浙江省基础公益研究计划项目(LTGS23C030005)、湖州市科技计划项目(2024GN01)和国家重点研发计划项目(2023YFD2401802)资助 This study was supported by the Natural Science Foundation of Zhejiang Province(LTGS23C030005),the Science and Technology Planning Project of Huzhou(2024GN01),and the National Key Research and Development Program of China(2023YFD2401802). （LTGS23C030005）
