几种类型土壤对碱的缓冲作用及其影响因素研究

Study on Buffering Action of Several Soil Types on Alkali and Its Influencing Factors

为了探讨几种土壤类型对碱的缓冲特征,笔者采用电位法测定土壤碱缓冲能力大小,对几种类型土壤对碱的缓冲特征及影响因素进行了初步研究。结果表明:几种类型土壤对碱的缓冲能力大小依次为黄棕壤>水稻土>砂姜黑土>潮土。不同肥力砂姜黑土和水稻土对碱溶液的缓冲能力均是高肥力>中肥力>低肥力。不同有机质含量土壤对碱溶液的缓冲能力均是高量有基质>中量有机质>对照。同一类型土壤对碱缓冲能力高低与肥力高低和有机质含量高低成正比。

In order to investigate the alkali buffering action of several soil types, the author adopted thepotentiometric method, and preliminarily studied buffering and influencing factors. The results showed that：buffering capacity to alkali of different soil types followed the order of yellow brown soil〉 paddy soil〉Shajiang black soil〉 moisture soil. The buffering capacity of different fertility Shajiang black soil and paddysoil followed the order of high fertility〉 middle fertility〉 low fertility. The buffering capacity of different soilorganic matter contents followed the order of high content of organic matter〉 middle content of organicmatter〉CK. The buffering capacity of the same soil type was proportional to soil fertility and the content oforganic matter.