三倍体毛白杨幼龄林生长与叶片养分含量的相关性

为研究三倍体毛白杨幼龄林生长量与叶片养分含量的相关性,在造林后的4 a中,每年均在秋季时测量生长量并采集叶样测定叶片养分的含量。通过对所得数据进行相关分析得出,胸径和树高均与叶片的N、P、K、Ca、Fe、Cu和Zn含量呈正相关,与叶片N∶P比值呈负相关。进行回归分析后比较回归系数的大小得出,叶片的P和Ca含量对林木生长有影响作用。

Correlations between Foliar Nutrient Contents and Growth in a Young Triploid Populus tomentosa Plantation

In order to study the relationship between foliar nutrient contents and the growth of triploid Populus tomentosa plantations, DBH (diameter at breast height) and H (height) were recorded and leaf samples were collected in each autumn for four years since 2005 and to measure the nutrient contents. The results shawed that DBH was positively correlated with nutrient contents of N, Regression results showed that DBH and H both greatly influenced by foliar P, and Ca contents.