土壤学报2011，Vol.48Issue(4)：781-787,7.
添加玉米秸秆培养对土壤团聚体胡敏酸数量和结构特征的影响
EFFECTS OF CORN STALK APPLICATION ON QUANTITY AND STRUCTURAL CHARACTERISTICS OF HUMUS ACID IN SOIL AGGREGATES
摘要
Abstract
Fractionation of a soil sample for soil aggregates of different size grades ( > 2 mm, 2 ~ 0. 25, 0. 25 -0. 053 and < 0. 053 mm) was carried out using the wet screening method for the study on effects of application of corn stalks on quantity and structural characteristics of humic acid in aggregates of the soil incubated indoors at a constant temperature of 25℃. Results show that after the application and incubation, aggregates of size fractions 2-0.25 mm and >2 mm turned out to be dominant in the soil accounting for 51. 41% and 34. 12% , respectively, on average. Their total carbon content ranged in 10. 15 ~25. 74 g kg-1, and their absolute HA content in 4. 06 ~5. 79 g kg-1, obviously higher than what was in the control, and the differences got bigger and bigger with the application rate of com stalks; However, the C/H and high/medium temperature exotherm ratios were lower in all the treatments than in the control, and negatively related to application rate of com stalk, which suggests that higher com stalk application rate makes HA molecules less condensed and simpler in structure.关键词
玉米秸秆/土壤团聚体/胡敏酸/数量/结构特征Key words
Corn stalk/ Soil aggregate/ Humis acid/ Quantity/ Structural characteristics分类
农业科技引用本文复制引用
仇建飞,窦森,邵晨,李明敏,安丰华..添加玉米秸秆培养对土壤团聚体胡敏酸数量和结构特征的影响[J].土壤学报,2011,48(4):781-787,7.基金项目
国家基础研究发展规划973项目(2011CB100503)、国家自然科学基金项目(40871107、40971141)和中国科学院知识创新项目(KZCX2-YW-Q1-07)资助 （2011CB100503）
