土壤2009，Vol.41Issue(5)：764-771,8.
三种植物物料对两种茶园土壤酸度的改良效果
Amelioration Effects of Three Plant Materials on Acid Tea Garden Soils
摘要
Abstract
The amelioration effects of rice straw, peanut straw and Chinese milk vetch shoot on the acidity of red soil and yellow brown soil from tea gardens were examined with the incubation experiments at three levels of plant materials, i.e., 5, 10 and 20 g/kg added. After the soils incubated with plant materials, soil exchangeable acid and exchangeable Al decreased while exchangeable base cations and base cation saturation increased. For yellow brown soil added with Chinese milk vetch, soil pH increased to some extent compared with control. The amelioration effects of plant materials on soil acidity depend on the ash alkalinity and N content in plant materials. The ash alkalinity and mineralization of organic N increased soil pH, while nitrification of NH_4~+-N decreased soil pH. The amelioration effect of peanut straw on soil acidity was greater than Chinese milk vetch shoot and rice straw. The incorporation of plant materials into soils resulted in the decline of toxic species of Al obviously in soils, which suggest that the addition of plant materials could alleviate aluminum toxicity to plants in acid soils.关键词
植物物料/茶园土壤/酸度改良/土壤pH/交换性铝/可溶性铝Key words
Plant materials/Tea garden soil/Amelioration of soil acidity/Soil pH/Exchangeable Al/Soluble Al分类
农业科技引用本文复制引用
王宁,李九玉,徐仁扣..三种植物物料对两种茶园土壤酸度的改良效果[J].土壤,2009,41(5):764-771,8.基金项目
江苏省自然科学基金项目(BK2006253)、国家支撑计划项目(2006BAD05B02)和国际科学基金项目(C/.4073-1)资助. （BK2006253）
