水土保持学报2017，Vol.31Issue(2)：215-220,6.DOI:10.13870/j.cnki.stbcxb.2017.02.036
有机物料对不同作物根系土壤腐殖质组成和结构的影响
Effects of Organic Materials on the Composition and Structure of Humic Substance in the Rhizosphere Soil of Different Crops
摘要
Abstract
In order to study the changes in the composition of humic substance and elemental composition of humic acid in the rhizosphere soil of different crops,a two-year field experiment in Jilin Agriculture University experimental field was carried out.Three crops (corn,soybean and cabbage) were selected in the experiment and each crop was subjected to four fertilizer treatments,including chemical fertilizer (CK),straw combined with chemical fertilizer,leaves combined with chemical fertilizer,and poultry manure combined with chemical fertilizer.The water-soluble substance (WSS),humic acid (HA),fulvic acid (FA),and humic material (HM) were extracted by the modified method of humic substance composition.The organic carbon contents of soil humic components were measured by the method of K2 Cr2 O7 thermal oxidation,the optical properties of HA and FA were measured by a spectrophotometer,and the structural changes of humic acid were indicated from the ratio of E4/E6 and elemental composition.The results showed that the contents of total organic carbon and humic components followed the order of cabbage＞corn＞soybean.Compared with the CK,the application of organic materials significantly increased the organic carbon contents of TOC,WSS,HA in the rhizosphere soil of different crops by 5％ to 8％,34％ to 55％ and 8％ to 20％,respectively.Organic materials had no significant effect on carbon contents of FA.Compared with leaves and poultry manure,the application of maize straw significantly increased total organic carbon,application of different types of organic materials did not show a remarkable difference in organic carbon contents of WSS,the order of carbon contents of humic material were:maize straw＞leaves＞poultry manure＞CK.The effect of organic materials on the PQ values (the radio of HA/(HA+FA)) varied with different crops.The maize straw and poultry manure treatments had similar effects on PQ values in the rhizosphere soil of corn and soybean,and the poultry manure significantly increased PQ values in the rhizosphere soil of cabbage.The application of organic materials resulted in a significant increase of the E4/E6 value in fulvic acid,while a little bit decreased E4/E6of humic acid.Organic materials enhanced condensation degree,complicated the structure of HA,and increased the contents of nitrogen-containing groups of HA,with the effect of maize straw being the most significant.In general,organic materials showed better fertilization effect on soil than chemical fertilizer.The effect of poultry manure on the rhizosphere soil of cabbage was the most significant,maize straw and poultry manure treatments had similar effects on the rhizosphere soil of corn and soybean.关键词
有机物料/根系/腐殖质组成/胡敏酸元素组成Key words
organic materials/rhizosphere/humic substance components/elemental composition of humic acid分类
农业科技引用本文复制引用
王维,吴景贵,李蕴慧,李建明,赵欣宇,曲晓晶,胡娟..有机物料对不同作物根系土壤腐殖质组成和结构的影响[J].水土保持学报,2017,31(2):215-220,6.基金项目
吉林省科技厅重大科技招标专项“畜禽粪便高效转化生产有机肥关键技术及产品研发”(20150203004NY) （20150203004NY）
国家科技支撑计划项目(2012BAD14B05,2013BAC09B01) （2012BAD14B05,2013BAC09B01）
吉林省科技厅重点科技成果转化项目(20130303035NY) （20130303035NY）
