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黑土底土加入大比例玉米秸秆后胡敏素组分的变化

ISSN号：1009-2242
期刊名称：《水土保持学报》
时间：0
分类：S153[农业科学—土壤学;农业科学—农业基础科学]
作者机构：[1]吉林农业大学资源与环境学院,吉林长春130118, [2]辽宁农业职业技术学院质检中心,辽宁营口115009
相关基金：国家自然科学基金（40271069,40471076）,高校博士点基金（20040193002）资助

关键词：黑土底土, 大比例玉米秸秆, 腐殖物质, 胡敏素组分, 数量变化, 光学性质, black subsoils large proportion corn stalks humin fractions , quantity changing , optical property

中文摘要：

以往主要注重加入常量有机物料对土壤腐殖物质中的胡敏酸（HA）、富里酸（FA）影响的研究,而对于添加大比例有机物料及其对胡敏素（HM）各组分影响的研究较少,特别是关于添加大比例有机物料后腐殖物质中胡敏素（HM）各组分的动态变化研究尚未见报道。因此为更好地发挥土壤固碳潜力、提高土壤和环境质量,本文运用Pallo修改法将土壤HM分为铁结合胡敏素（HMi）、粘粒结合胡敏素（HMc）和不溶性胡敏素（HMr）3个组分,对加入大比例玉米秸秆后黑土底土各胡敏素组分数量和性质的变化进行了研究,结果表明：在HM中HMi/HMc随着土/秸比的增加而增加,高土/秸比有利于HMi的形成和积累,而低土/秸比有利于HMc的形成和积累;随着培养时间的延长HMi和HMc的ΔlogK值降低,分子向复杂化方向发展,且随着土/秸比的增加而减少,分子复杂程度增加;高土/秸比更有利于HMi活性的提高和脂肪族结构的增加,而低土/秸比更有利于HMc活性提高和脂肪族结构的增加。

英文摘要：

People used to focus on the effect of added organic material on HA and FA of humic substances fraction, and little has been done on the effect of added large proportion organic material on humin （HM） fractions, especially dynamic changes in HM fractions which added large proportion organic material has＇t been reported until now. In order to exert carbon sequestration potential of soil, improve quality of soil and environment modified Pallo method was used to divided HM into iron-linked HM （HMi）, clay-combined HM （HMc） and insoluble humin residues （HMr）, and investigated the quantity and property changes of black subsoil humin fractions added large proportion corn stock in this paper. Results showed that the ratio of HMi/HMc increased with augment ratio of soil/corn, namely high ratio of soil/corn was beneficial to forming and accumulating HMi, but low ratio of soil/ corn was helpful to forming and accumulating HMc ; AlogK of HMi and HMc decreased with prolonging time and enhancing ratio of soil/corn, the structure of molecular becoming more complicated ; High ratio of soil/corn was beneficial to heightening activation degree and aliphatic fabric of HMi, however, high ratio of soil/corn was favorable to improving activation degree and aliphatic fabric of HMc.

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