摘要
以晋北半干旱风沙区为研究区域,采用漏斗状覆膜技术造林,探讨覆膜对不同密度(株行距分别为2m×2m、3m×3m、4m×4m、4m×6m)新疆杨生长和光合特性的影响。结果表明,漏斗状覆膜技术对不同密度新疆杨生长和光合特性有显著影响(P<0.05),2m×2m密度的新疆杨生长性状和光合特性表现最优,不同密度的树高、胸径、当年生长量、成活率、叶绿素含量、净光合速率表现出随密度减小而递减的规律,相关分析显示树高、胸径与净光合速率的相关系数分别为0.991、0.863,与叶绿素含量的相关系数分别为0.858、0.584。综合分析结果,在晋北半干旱风沙区,覆膜面积所占比例显著影响树木的成活与生长,新疆杨初植密度为2m×2m且漏斗状覆膜效果最佳。
Taking the semi-arid sandy region of northern Shanxi Province as research area,the effects of funnel-shaped film mulching on the growth and photosynthesis of Populus bolleana seedlings with different planting densities (2×2,3×3,4×4,and 4 m×6 m) were examined.Significant influences ( P 〈0.05) were observed.The growth indexes and photosynthetic characteristics were the best in the density of 2 m×2 m.The tree height (H),diameters at breast height (DBH),annual growth,survival rate,chlorophyll content (ChlC) and net photosynthetic rate ( P n) decreased with the decrease of planting density.Correlation analysis showed that the correlation coefficients were 0.991 (between H and P n) ,0.863 (DBH and P n),0.858 (H and ChlC) ,0.584 (DBH and ChlC),respectively.Over all,the proportion of film mulching significantly affected the survival and growth of P.bolleana ,and the initial density of 2 m×2 m with funnel-shaped film mulching was suggested in semi-arid sandy area of Northern Shanxi Province.
作者
郭斌
郑智礼
杨飞
赵娟
杨延青
姚建忠
李丕全
胡海东
GUO Bin;ZHENG Zhi-li;YANG Fei;ZHAO Juan;YANG Yan-qing;YAO Jian-zhong;LI Pi-quan;HU Hai-dong(Shanxi Academy of Forest Sciences,Taiyuan,Shanxi 030012,China;The Experimental Bureau of Poplar High-yielding Forest of Shanxi Province,Datong,Shanxi 037006,China)
出处
《西北林学院学报》
CSCD
北大核心
2018年第6期15-19,共5页
Journal of Northwest Forestry University
基金
国家重点研发计划课题(2016YFD0600403)
国家林木(含竹藤花卉)种质资源平台建设与运行服务(2005DKA21003)
关键词
漏斗状覆膜
密度
新疆杨
生长性状
光合特性
funnel-shaped mulching
density
Populus bolleana
growth trait
photosynthetic characteristics