摘要
研究并比较了不同利用方式下酸性硫酸盐土酸形态和铝形态的结构特征,分析了硫形态与酸形态、酸形态与铝形态之间的相关性。研究发现,酸性硫酸盐土的不同利用类型中,土壤酸度由大到小依次为:鱼塘塘基、荒稻田>稻田>荒旱地>改良稻田>蔗田>红树林迹地;活性铝含量由高到低依次为:荒旱地>鱼塘塘基、荒稻田>稻田>改良稻田>蔗田>红树林迹地。土壤酸度和铝形态含量的层间差异较为显著,多数随深度增加呈逐渐上升的趋势。酸性硫酸盐土中的硫形态—酸—铝形态之间有明显的连锁关系。
In order to understand the relations between land use types and enviro nmental risks of acid sulfate soils (ASS), followed to provide scientific basis for a wise use and effective management of the ASS, the situation of acid hazard and Al toxicity in the ASS were studied through acid and Al forms test and synt hesis. The results showed that: (1) in the ASS of some use types, the soil acidi ty orders were in: pond-bank & fallow-paddy field > paddy field > fallow dry farmland>reformed paddy field>sugarcane field> Mangrove field; (2) contents of a ctive Al forms in the soils were: fallow dry farmland>Pond-bank & fallow paddy field > paddy field >reformed paddy field>sugarcane field> Mangrove field; (3) significant vertical difference of soil acidity and contents of Al forms existed in the ASS and most of them were increased along with the increasing of depth; (4) the correlation chain of S forms-acidity-Al forms was significant.
出处
《农业环境保护》
CAS
CSCD
北大核心
2002年第3期211-214,227,共5页
Agro-Environmental Protection
基金
广东省自然科学基金(980161)
中科院知识创新项目(KXCX2-302)
