长期定位施肥黑土水溶性有机物组分组成特性研究  

Characteristics of dissolved organic matter fractions in black soil by long-term fertilization

作　　者：李书玲[1] 魏丹[2] 周宝库[2] 魏自民[1] 李艳平[1] 赵富阳[1] 

机构地区：[1]东北农业大学生命科学学院,哈尔滨150030 [2]黑龙江省农业科学院土壤肥料与环境研究所,哈尔滨150086

出　　处：《东北农业大学学报》2012年第2期103-107,共5页Journal of Northeast Agricultural University

基　　金：黑龙江省杰出青年基金(JC200622);哈尔滨市创新人才基金项目(2008RFXYN029)

摘　　要：利用LiquiTOC仪对黑河、哈尔滨、公主岭三个地区近30年长期定位施肥土壤水溶性有机物及其各组分进行了测定分析。结果表明,土壤DOM分子质量<1 ku组分比例,OM>MNPK>CK>NPK处理;DOM分子质量>1 ku组分则表现相反的趋势。此外,与不施肥处理(CK)比较,施用有机肥(OM)土壤DOM中小分子质量的富里酸含量相对较多,DOM分子结构相对简单化;而长期施用无机肥(NPK),土壤DOM中较大分子质量组分比例增加,分子结构有趋于复杂化的态势。The objective of this study was to investigate dissolved organic matter（DOM） of soil by long-term application located in Heihe, Harbin, Gongzhuling. The results showed that the concentrations of MW〈I ku in DOM fractions followed by OM, MNPK, CK, NPK; while in MW〉I ku, the concentrations of DOM fractions revealed opposite tendency. In addition, OM application could lead to less the degree of aromatization, while NPK application made a higher degree of humification in soil DOM.

关 键 词：黑土 长期定位施肥 水溶性有机物 总有机碳 

分 类 号：S147.5[农业科学—肥料学]