漏斗状覆膜对不同密度新疆杨生长及光合特性的影响

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2 m×2 m,3 m×3 m,4 m×4 m,4 m×6 m)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小于0.05),2 m×2 m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2 m×2 m且漏斗状覆膜效果最佳。

Taking the semi-arid wind-sand region of northern Shanxi as the study area, this study conducted afforestation using funnel-shaped mulching technology to investigate the effects of mulching on the growth and photosynthetic characteristics of Xinjiang poplar (*Populus alba* var. *pyramidalis*) under four planting densities, with row × plant spacings of 2 m×2 m, 3 m×3 m, 4 m×4 m, and 4 m×6 m, respectively. The results demonstrated that funnel-shaped mulching technology had significant effects on the growth and photosynthetic characteristics of Xinjiang poplar under different planting densities (P < 0.05). Xinjiang poplar at a density of 2 m×2 m displayed the optimal growth traits and photosynthetic characteristics. Tree height, diameter at breast height (DBH), current annual growth increment, survival rate, chlorophyll content, and net photosynthetic rate of Xinjiang poplar across all planting densities all exhibited a decreasing trend as the planting density decreased. Correlation analysis revealed that the correlation coefficients between tree height/DBH and net photosynthetic rate were 0.991 and 0.863, respectively, while those between tree height/DBH and chlorophyll content were 0.858 and 0.584, respectively. Comprehensive analysis indicated that in the semi-arid wind-sand region of northern Shanxi, the mulching area proportion significantly affects tree survival and growth, and the optimal effect is achieved when the initial planting density of Xinjiang poplar is 2 m×2 m combined with funnel-shaped mulching technology.

搜集汇总

背景与挑战

背景概述

该数据集研究了在晋北半干旱风沙区应用漏斗状覆膜技术对不同密度新疆杨生长和光合特性的影响。结果表明，覆膜技术对树木生长和光合特性有显著影响，其中2 m×2 m密度的新疆杨表现最优，且覆膜面积比例对成活与生长至关重要。