荔枝叶片与土壤常量元素质量分数年周期变化研究

Seasonal Variation of the Contents of Major Nutrient Elements in Litchi Foliage and in Orchard Soil

从１９９７年开始，对荔枝叶片和土壤常量有效养分质量分数、ｐＨ值的年周期变化进行了研究。通过统计学分析，初步探明叶片各元素质量分数季节性变化的模式及其特点，以及土壤有效养分质量分数、ｐＨ值年周期变化的趋势；分析了年周期变化中叶片与土壤分析值之间的相关性。

The annual variation in the contents of N, P, K. Ca and Mg in the leaves of litchi, and the annual variation in the contents of available major nutrient elements and in pH of the orchard soils in Zengcheng, Guangdong have been studied in this paper. By statistical analysis, this paper preliminarily finds out the variation pattern and characteristics of the elements in leaves, and the tendency of annual variation in the contents of soil available nutrients and in pH; and analyses the correlation between the annual variation of leaves and the annual variation of soil.