摘要
用双曲线函数y=y_0-t/(a+bt)作为土壤固锌数学模型,可适用于分析预测钙质、中性、酸性紫色土施锌后,土壤有效锌的变化动态。土壤固锌速率(y/t)及最大固锌量(1/b)均随施锌水平的增加而显著提高。土壤特征固锌速率(V_(fix))可作为土壤固锌能力强弱的综合指标。其V_(fix)值主要取决于土壤类型,而与施锌水平无显著关系。
Using hyperbola function y=yo-t/(a+bt) as the model of soil zinc fixation is suitable to analyse and forecast the changes of zinc availability of calcium, neutrial and acidic purple soils after zinc is applied. The rates of soil zinc fixation (y/t) and the maximum amounts of zinc fixation (1/b) increase with the increation of the applied zinc. Soil characterized rate of zinc fixation (V_(fix)) values is mainly determined by the kind of soils, not relating to the levels of applied zinc, So, it can be used as the index of soil zinc fixation capacity.
出处
《西南农业大学学报（自然科学版）》
CSCD
1990年第6期596-599,共4页
Journal of Southwest Agricultural University
关键词
紫色土
固锌
数学模型
purple soil
mathematical models
zinc
