摘要
砂质土壤腐殖质含量低,影响了土壤肥力。文章通过田间条件下砂滤管试验,利用膨润土的吸附和粘结功能,研究了膨润土不同用量对土壤腐殖质特性的影响。结果表明:膨润土在促进松结态腐殖质分解、加速紧结态腐殖质合成方面发挥了重要作用,有利于增加土壤系统的内稳性。施用膨润土促进了紧结态和稳结态腐殖质中HA的积累,提高了HA/FA比。胡敏酸红外吸收光谱表明,膨润土能使其脂肪族物质增多、芳化度降低。膨润土具有提高土壤腐殖质含量,改善土壤腐殖质特性,从而提高了土壤肥力。
Field experiments were carried out with sand filter pipe to study the effect of bentonite on soil humus characteristics. The results showed that bentonite played an important role in enhancement of the decomposition of the loose-combined form of humus and synthesis of close combined form of humus, and help to increase the stability of soil system. Application of bentonite can enhance accumulation of HA in the fraction of close and steady combined humus, and the HA/FA ratio. The infrared spectrum indicated that bentonite can increase fat race matter content, and reduce the aromaticity of humus.
出处
《生态环境》
CSCD
北大核心
2008年第2期722-726,共5页
Ecology and Environmnet
基金
北京市农林科学院科技创新能力专项
北京市科技新星项目(9558102100)
北京市重大科技项目(D0706004040431)
北京市自然科学基金项目(6022006)
关键词
膨润土
腐殖质
特性
bentonite
humus
characteristics
