不同有机物料对黑土腐殖质结合形态影响差异性的研究

通过盆栽试验,研究了施用不同有机物料后黑土腐殖质结合形态含量及特征变化。结果表明,草本处理松结态腐殖质总量始终高于CK,并且在施用有机物料1a后差异显著,而动物粪便在施用5a后显著高于CK。各处理松结态腐殖质胡敏酸/富里酸（H/F）只在施用1a后表现出明显差异,光密度也只在施用1a后有明显差异,而各处理联结态腐殖质含量表现为施用1a后显著低于CK,随时间延长显著高于CK,施用5a后则无明显差异;光密度在施用5a后才表现出明显差异,草本残体、动物残体显著高于其他处理,木本残体、动物粪便、CK之间则无明显差异。各处理对于稳结态腐殖质含量的影响无明显差异,但对其组成影响并不相同。与CK相比,施用有机物料1a后,紧结态腐殖质含量显著提高,但有机物料之间差异不显著。各处理松/紧表现为,施用1a后,草本残体显著高于其他处理,而木本处理、动物粪便处理显著低于CK,随时间的延长各处理则无明显差异。

Effects of the Different Organic Materials on the Combined States of Humus in Black Soil

Humic substances（HS） are the most important components of soil organic matter and soil carbon sequestration,So it is one of the hot issues of international affairs and Low-carbon Society.Application of organic materials is an important practice for maintaining and/or improving the physical,chemical and biological performances of HS in soils.In this paper,the pot experiment was conducted to study the effect of the different organic materials on the combined states of humus in black soil.The results showed as follow：Compared with control treatment（CK）,application of herb residues increased contents of loosely combined soil humus substances,and significantly higher than CK in the first year,after five years used of animal excrement increased the content of loosely combined markedly.The ratio of HA and FA of loosely combined was significantly difference in the first year.E4/E6 of every treatment was also significantly different in the first year.The content of unitedly combine humus of organic materials were all notable lower than CK in the first year,but significantly higher than CK three year later,E4/E6 indicated obvious difference until the fifth year,among them,herb residues,animal remnant significantly higher than others,and there were no significant difference among them.There were no difference in the content of the stably combined,but the composition was different.Compared to CK,the content of tightly was increased visible after application of organic materials a year later.The ratio of loosely and tightly showed herb residues dramatically enhanced the ratio,woody residues and animal excrement were observably lower than CK in the first year,and there was no obvious difference with the time going on.