摘要
本文研究了长期不施肥土壤团聚体中胡敏素的含量以及光学性质,结果表明,长期不施肥土壤团聚体中HMr含量随粒级的减小而降低。不同粒级相比0.25～0.053 mm粒级HMi的含量最低。HMi/HMc比值表现为<0.053 mm粒级的最高。随粒级的减小HMi的E4/E6比值降低,<0.053 mm粒级团聚体中HMi的分子质量大,缩合度高,结构复杂。
Contents and optical properties of soil aggregates under long time no fertilization were studied in this paper. Results showed that the content of residual humin （HMr） decreased with aggregate size reducing. Among different size aggregates, the content of ion linked humin （HMi） extracted from 0.25 - 0.053mm was the lowest, and the HMi/HMc ratio of 〈0.053mm was the highest. The E4/E6 ratio of HMi declined with the deceasing of soil aggregates and the HMi molecular of 〈0.053mm had a big molecular mass, high condensation degree and complex structure.
出处
《吉林农业科学》
CSCD
北大核心
2013年第2期52-54,80,共4页
Journal of Jilin Agricultural Sciences
基金
国家自然科学基金项目(40871107
40971141)
吉林农业科技学院青年基金项目(2009109)
关键词
不施肥
土壤团聚体
胡敏素
含量
光学性质
No fertilization
Soil aggregate
Humin
Content
Optical property
