农业资源与环境学报2026，Vol.43Issue(5)：1155-1163,9.DOI:10.13254/j.jare.2026.0082
江汉平原稻虾共作下土壤还原性物质的累积过程与时空动态
Accumulation and spatiotemporal dynamics of soil reductive substances under rice-crayfish co-culture in the Jianghan Plain
摘要
Abstract
Long-term flooding under the rice-crayfish co-culture system may increase the risk of soil gleying.To reveal the accumulation process and spatiotemporal dynamics of soil reducing substances under the rice-crayfish co-culture system.Using the core rice-crayfish co-culture area of the Jianghan Plain as the study area,paddy fields with rice-crayfish co-culture histories ranging from 1 to 10 years were selected.Six field plots were randomly chosen for each cultivation duration,and middle-season rice monoculture paddy fields were used as the control.Soil samples were collected from the 0-5,5-10,10-20 cm and 20-30 cm layers,and the contents of Fe(Ⅱ),Mn(Ⅱ),active reducing substances,and total reducing substances were determined.With increasing years of rice-crayfish co-culture,the contents of Fe(Ⅱ)and other soil reducing substances generally increased in all soil layers.In the 0-30 cm soil layer,compared with the middle-season rice monoculture system,Fe(Ⅱ),Mn(Ⅱ),active reducing substances,and total reducing substances in the first year of rice-crayfish co-culture increased by 40.09%,10.89%,29.89%,and 33.84%,respectively;in the fifth year,they increased by 113.53%,131.97%,136.38%,and 77.51%,respectively;and in the tenth year,they increased by 170.19%,248.01%,262.54%,and 134.58%,respectively.In the 0-30 cm soil layer,soil Fe(Ⅱ)content(y)showed a linear regression relationship with the years of rice-crayfish co-culture(x):y=0.109 5x+0.649 7(R2=0.952 7).The total amount of soil reducing substances(y)also showed a linear regression relationship with co-culture years(x)within 0-10 years:y=0.248 9x+2.715 7(R2=0.825 2).In addition,with increasing soil depth,the contents of all reducing substances generally increased.The contents of Fe(Ⅱ),Mn(Ⅱ),active reducing substances,and total reducing substances were 1.033 6,0.111 7,1.526 2,and 3.416 5 cmol·kg-1,respectively,in the 0-5 cm layer,and increased to 1.312 5,0.162 0,1.888 7,and 4.421 1 cmol·kg-1,respectively,in the 20-30 cm layer.Rice-crayfish co-culture leads to the accumulation of soil reducing substances.The contents of Fe(Ⅱ),Mn(Ⅱ),active reducing substances,and total reducing substances generally increased with co-culture duration and with soil depth,showing clear temporal and spatial variation patterns.关键词
稻虾共作/共作年限/潜育化/还原性物质/稻田土壤Key words
rice-shrimp intercropping/intercropping duration/gleyzation/reductive substance/rice field soil引用本文复制引用
牛鑫泽,卢姜蒙,李萍,佀国涵,刘威,李辉,彭成林..江汉平原稻虾共作下土壤还原性物质的累积过程与时空动态[J].农业资源与环境学报,2026,43(5):1155-1163,9.基金项目
湖北省重点研发项目(2024BBB092) （2024BBB092）
