摘要
石灰性紫色土中的锌形态有8种,各形态锌的含量差异显著.土壤中的碳酸盐和有机质是主要吸锌载体.碳酸盐结合态锌是土壤中锌形态间转化的主要参与者.锌各形态中,松结有机结合态锌和碳酸盐结合态锌是土壤中有效锌DTPA-Zn的主要补给源.
Studies on the distribution and availability of zinc fractions in calcareous purple soils of Sichuan Province were carried out by using the sequential chemical extraction procedure. Results showed: 1. The fraction of zinc occurring in minerals and crystalline iron oxides accounted for over 90% of the total, and others less than 10%. Carbonates and organic matter are main carrying zinc matter in soils. 2. Bound to carbonates is the main participant of transformation between weak absorption and strong absorption. 3. Loose bound to organic matter and bound to carbonates are major supply sources of available zinc,along with bound to amorphous iron oxides manage availability zinc.
出处
《山地学报》
CSCD
1996年第S1期59-63,共5页
Mountain Research
关键词
石灰性紫色土
锌形态
有效性
calcareous purple soil, zinc fraction, availability
