摘要
通过田间定位试验,研究了不同耕作方式对潮棕壤0-100 cm深度6个土层土壤交换性阳离子的影响。结果表明,与常规耕作相比,免耕使土壤表层pH显著增加,而电导率下降;同时,免耕增加了表层土壤可交换性K+含量,降低了可交换性Na+含量,但对可交换性Ca2+,Mg2+和阳离子交换量没有产生显著影响。相关分析结果表明,可交换性K+与土壤养分含量没有显著相关性,而可交换性Na+,Ca2+,Mg2+和阳离子交换量与有机质和全氮含量均呈负相关关系。
The effects of tillage systems on exchangeable cations of different layers to a 1 m depth in an aquic brown soil were studied in a field experiment.The results showed that no-tillage,compared with conventional tillage,significantly increased soil pH and reduced electronic conductivity（EC） in the 0-5 cm layer.Soil exchangeable K＋ was improved in no-tillage treatment,while exchangeable Na was declined.However,there was no significant effect of tillage practices on soil exchangeable Ca2＋,Mg2＋ and cation exchange capacity.Correlation analysis showed that no significant correlations were observed between exchangeable K and soil nutrients,whereas exchangeable Na＋,Ca2＋,Mg2＋,as well as cation exchange capacity had significant negative correlations with organic matter（OM） and total nitrogen（TN）,respectively.
出处
《水土保持学报》
CSCD
北大核心
2009年第5期184-186,247,共4页
Journal of Soil and Water Conservation
基金
中国科学院知识创新工程重要方向项目(KZCX2-YW-445)
