施用有机物料对覆膜滴灌土壤团聚体及有机碳分布的影响  

Effects of Applying Organic Materials on Soil Aggregates and Organic Carbon Distribution in Drip Irrigation with Film Mulching

作　　者：谷月 吴景贵[1] GU Yue;WU Jinggui(College of Resources and Environment,Jilin Agricultural University,Changchun 130118,China)

机构地区：[1]吉林农业大学资源与环境学院,长春130118

出　　处：《吉林农业大学学报》2024年第5期762-768,共7页Journal of Jilin Agricultural University

基　　金：吉林省科技攻关项目(20190301018NY);国家重点研发计划项目(2017YFD0201801,2018YFD0300203)。

摘　　要：以内蒙古扎赉特旗图牧吉镇长期覆膜滴灌区域土壤为研究对象,探究不同有机物料(秸秆、牧草、羊粪)还田对土壤有机碳及土壤团聚体特征的影响,并分析比较不同有机物料还田差异。结果表明:与对照组相比,有机物料还田,土壤粒级碳含量增加1.01~2.67倍;3种物料中羊粪效果最好,平均高于其他物料1.06倍,1.12倍,说明羊粪还田的土壤固碳潜力更强,能更多地促进土壤有机碳的贮存。同时,有机物料还田,促进土壤中大粒径(>0.25 mm)土粒占比上升,R>0.25、MWD、GMD逐渐增大,PAD、分形维数(D)和土壤可蚀性K值逐渐减少。表明有机物料还田能明显增强土壤团聚体稳定性,其中秸秆更有利于增强机械稳定性,羊粪更有利于增强水稳定性。综上,有机物料还田促进半干旱覆膜滴灌土壤有机碳含量,同时增强了土壤团聚体稳定性。Taking soil in the area of long-term drip irrigation with film mulching in Tumuji Town,Zhalaite Banner,Inner Mongolia,as the research object,to explore the effects of different organic materials(straw,pasture,and sheep dung)returning to the field on the characteristics of soil organic carbon and soil aggregates,and analyze and compare the differences of different organic materials returning to the field.The results showed that,compared with the control group,organic materials returned to the field increased soil grain-level carbon content by 1.01 to 2.67 times;among the three materials,the effect of sheep manure is better,1.06 times and 1.12 times higher than other materials on average,indicating that the return of sheep manure to the field has a stronger potential for soil carbon sequestration and can more promote the storage of soil organic carbon.At the same time,returning organic materials to the field promoted the increase in the proportion of large-diameter(>0.25 mm)soil particles in the soil.R>0.25,MWD,GMD was gradually increased,PAD,fractal dimension(D)and soil erodibility K value gradually decreased.It shows that returning organic materials to the field can significantly enhance the stability of soil aggregates,among which straw is more conducive to enhancing mechanical stability,and sheep manure is more conducive to enhancing water stability.In summary,returning organic materials to the field promotes the organic carbon content of semi-arid mulched drip irrigation soils,while enhancing soil aggregate stability.

关 键 词：土壤团聚体 有机物料 覆膜滴灌 有机碳 稳定性 

分 类 号：S152.4[农业科学—土壤学]