不同玉米秸秆还田方式对土壤腐殖质结合形态影响  

Effects of Different Corn Straw Returning Methods on Combined States of Soil Humus

作　　者：岳红丽 吴景贵[1] 王蒙 YUE Hong-li;WU Jing-gui;WANG Meng(College of Resources and Environment,Jilin Agricultural University,Changchun,Jilin 130118;Institute of resources and Environment,Jilin Academy of Agricultural Sciences,Changchun,Jilin 130033)

机构地区：[1]吉林农业大学资源与环境学院,吉林长春130118 [2]吉林省农业科学院农业资源与环境研究所,吉林长春130033

出　　处：《安徽农业科学》2019年第18期56-59,共4页Journal of Anhui Agricultural Sciences

基　　金：国家重点研发计划项目(2018YFD0300203;2017YFD0201801)

摘　　要：通过微区试验,研究玉米秸秆4种还田方式对土体联合态腐殖质的含量及组成影响。采用熊毅—傅积平改进法对土壤进行不同结合态的腐殖质提取,再分别测定有机碳含量、胡敏酸含量及富里酸含量。结果表明,秸秆不同方式还田对土壤总有机碳、松结态和联结态腐殖质影响显著。总有机碳、松结态、联结态的碳含量和HA、FA的含量以秸秆混合覆盖还田处理最高,玉米秸秆深还田处理总有机碳、FA的含量与松联结合态的HA含量最低,差异显著;稳结态、紧结态的腐殖质碳和HA含量为粉碎混合覆盖处理最高,差异不显著。不同玉米秸秆还田方式,各腐殖质形态含量各异。秸秆一年内还田以粉碎秸秆与土混合覆盖还田方式整体表现最好。Micro-plot experiments were conducted to study the effects of four maize and wheat straw returning methods on the content and composition of soil combined humus.Soil humus was extracted adopted grouping method of different humus combined forms modified by XiongYi-Fu Jiping,then the organic carbon content,humic acid content(HA) and fulvic acid content(FA) of soil humus were determined respectively.The results showed that the different ways of returning straw to the soil had significant effects on soil total organic carbon,loose joints and joint humus.Among them,the content of total organic carbon and HA and FA ,loosely-combined humus and unitedly-combined humus HA and FA were the highest in straw mulching and returning treatment;and the total organic carbon content ,FA content and HA content with loose state and bound state were the lowest in straw depth treatment,and the difference was significant. The content of carbon and HA in stable and compact humus was the highest in mixed mulching and returning treatment,but the difference was not significant.Different ways of corn and wheat straw returning to the field resulted in different humus forms and contents. When the straw is returned to the field within one year,the best way is to mix mulching of smashed straw and soil.

关 键 词：秸秆还田 腐殖质 结合态腐殖质 

分 类 号：S153.622[农业科学—土壤学]