摘要
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。
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 sam- ples were collected in each autumn for four years since 2005 and to measure the nutrient contents. The re- sults shawed that DBH was positively correlated with nutrient contents of N, P, K, Ca, Fe, Cu and Zn, while negatively correlated with foliar N ： P ratio. Regression results showed that DBH and H both great- ly influenced by foliar P, and Ca contents.
出处
《西北林学院学报》
CSCD
北大核心
2010年第1期15-19,29,共6页
Journal of Northwest Forestry University
基金
国家"十一五"科技支撑课题(2006BAD32B01)
国家林业局专项课题(2002-66)
关键词
三倍体毛白杨
生长量
叶片养分含量
回归分析
养分管理
triploid Populus tomentosa
growth of plantations
foliar nutrient contents
regression analysis
nutrient management
