林隙大小对蒙古栎人工更新幼树生长和形态的影响

Effects of Gap Size on Growth and Morphology of Artificial Regeneration Young Trees of Quercus mongolica

以木兰围场蒙古栎林为研究对象,讨论不同林隙大小导致蒙古栎林人工更新幼树时,幼树生长特征和形态特征产生的变化。采用随机抽样法,选取3块不同林隙大小的蒙古栎林地块,对幼树进行生长指标和形态指标的调查。调查结果可知,在林隙逐渐减小的情况下,蒙古栎林的树高、冠长、地径以及冠幅数值均显著减小,此时蒙古栎林的1级长度以及1级枝基径也随之减小,1级枝的密度则表现出增加状态。蒙古栎林的3块样本树种单株生物量明显减少,幼树的根冠比随之下降。在种植蒙古栎林并对林木进行人工更新过程中,需要考虑扩大林隙,调整幼树生长环境,让幼树的生长形态更符合种植要求。

Takes the effect of forest gap size on the growth and morphology of the Mongolian oak,and discusses the changes in the growth and morphological characteristics of the Mongolian forest.Using random sampling method,select three pieces of different forest gap size,young tree growth indicators and morphological indicators survey,after data sorting found that in the forest gap,Mongolian oak forest height,crown length,diameter and crown value show a significant reduction,the Mongolian oak forest level 1 length and level 1 branch base diameter also decreased,the density of level 1 branch increased state.The three sample oak species showed significantly reduced biomass,with the root crown ratio in young trees.In general,in the process of planting the Mongolian oak forest and manually updating the trees,it is necessary to consider expanding the forest gap,and adjust the growth environment of young trees,so that the growth form of young trees is more in line with the planting requirements.