沈阳市郊玉米连作土壤有机质组成及其对土壤结构的影响  

Compositions of Organic Matter in Soil in Continuous Corn Cropping Soil in Shenyang Suburban and Affect on Soil Structure

作　　者：张蕾[1] 依艳丽[1] 贺忠科[2] 贾振文[2] 杜安军[2] 

机构地区：[1]沈阳农业大学土地与环境学院,辽宁沈阳110161 [2]铁岭市土肥站,辽宁铁岭112000

出　　处：《土壤通报》2008年第4期756-760,共5页Chinese Journal of Soil Science

基　　金：辽宁省教育厅科学技术研究高校创新团队计划资助项目

摘　　要：通过对沈阳市郊玉米连作土壤的有机质、结构情况以及二者相互关系研究表明,土壤中有机质大致范围在16.31gkg-1～23.72gkg-1,腐殖质大致范围在15.17gkg-1～21.49gkg-1,非腐殖质大致范围在1.14gkg-1～2.59gkg-1;在腐殖质各组分中,胡敏素的含量最高,约占腐殖质总量的58.93%～66.34%,胡敏酸约占16.26%～22.87%,富里酸约占16.82%～18.20%,胡富比约在0.95～1.32之间;干筛处理后>0.25mm的土壤团聚体占到80%以上,其中以>2mm团聚体为主,湿筛处理后>0.25mm的土壤团聚体仅占20%左右,其中0.25～0.5mm团聚体为主,水稳性系数在17.33%～35.67%。对有机质及其各组分与土壤各级团聚体做的相关分析结果表明,有机质与0.25～5mm粒径组的团聚体呈显著相关,与>5mm团聚体不相关,且胡敏酸主要影响1～5mm大团聚体的形成。The tested resulls of soil organic matter, soil structure and their relationship in continuous corn cropping soil in Shenyang suburban, showed that organic matter contents was from 16.31gkg^-1 to 23.72gkg^-1, hunmic substances contents was from 15.17gkg^-1 to 21.49gkg^-1, and non-humic substances contents was from 1.14gkg^-1 to 2.59gkg^-1.Of the humic substances compositions, humin （HM） contents was the most of all, which was 58.93%-66. 34%,then humic acid （HA） contents was 16.26-22.87%, fulvic acid （FA） was the least of all which was 16.82% -18.20%, and the ratio both HA and FA was 0.95-1.32. The 〉0.25ram size group aggregates was over 80% by dry sieving but 20% by Yoder method, and the 〉2mm size group aggregates was the most of all levels by dry sieving, but the 0.25-0.5mm size group aggregates by Yoder method. The water stability coefficient was from 17.33% to 35.67%. The correlation between the each composition of humic substances and the each size group aggregates at all levels showed that organic matter was correlated significantly with from 0.25 to 5 mm size group aggregates but was not correlated with over 5 mm size group aggregates. Humic acid contributed to form 1-5 mm size group aggregates.

关 键 词：玉米连作土壤 有机质组成 团聚体 

分 类 号：S153[农业科学—土壤学] S152.4[农业科学—农业基础科学]