设施蔬菜栽培对土壤团聚体组成及稳定性的影响  

Effects of Cultivation in Greenhouse on Composition and Stability of Soil Aggregate

作　　者：王洪娟[1] 梁成华[1] 杜立宇[1] 

机构地区：[1]沈阳农业大学土地与环境学院,辽宁沈阳100866

出　　处：《河南农业科学》2013年第12期51-54,58,共5页Journal of Henan Agricultural Sciences

基　　金：国家自然科学基金项目(31171977)

摘　　要：土壤团聚体的数量和稳定性是衡量和评价土壤肥力的重要指标。以栽培年限为1、5、10、15、20a的日光温室土壤为研究对象,探讨了设施蔬菜栽培对土壤团聚体组成及稳定性的影响。结果表明,随着温室使用年限的增加,供试土壤中>0.25mm机械稳定性团聚体含量和土壤团聚体机械稳定性先降低后趋于稳定,温室土壤降幅大于露地土壤;>0.25mm水稳性团聚体含量和土壤团聚体水稳性先升高后趋于稳定,温室土壤的升幅高于露地土壤。有机质有利于提高土壤团聚体的水稳性;游离氧化铁、游离氧化铝、无定形氧化铝含量与>2mm团聚体含量呈正相关关系,其中游离氧化铁与>2mm团聚体含量呈显著的正相关关系,无定形氧化铁和络合态氧化铁含量与<0.25mm微团聚体含量呈正相关关系。The number and status of soil aggregates are the important indexes to measure and eva- luate the soil fertility. The solar greenhouses in which the vegetable was cultivated for 1,5,10,15 and 25 years, respectively, were chosen, and the effect of cultivation in solar greenhouse on compo- sition and stability of soil aggregate was discussed. The results showed that with the increase of cultivation years,the content of 〉0.25 mm aggregate with mechanical stability in the soil and the mechanical stability of soil aggregate reduced year by year, and greenhouse soil dropped more than outdoor soil;the content of 〉0.25 mm aggregate with water stability and the water stability of soil aggregate raised year by year, and the growth of greenhouse soil was higher than the outdoor soil. The organic matter helped to improve the water stability of soil aggregate;the free iron ox- ide,the free alumina, amorphous alumina and 〉2 mm aggregate content was positively related i the free iron oxide and 〉2 mm aggregate content was significantly positive correlation; amor- phous iron oxides,complexing iron oxide and 〈0.25 mm micro aggregate content was positively related.

关 键 词：设施蔬菜栽培 土壤团聚体 稳定性 无机胶结剂 

分 类 号：S152.4[农业科学—土壤学]