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为探讨石漠化地区先锋树种茶条木伐桩的萌蘖特性,以砍伐强度和伐桩高度为因子,研究了茶条木在不同砍伐强度(全伐和择伐)和伐桩高度(20、40和60 cm)处理下的伐桩存活情况,以及萌条的数量和生长量等特征。结果表明:砍伐近1年后茶条木伐桩的萌蘖率和存活率分别为99.24%和88.55%,其中伐桩存活率显示择伐大于全伐、高桩大于低桩并与伐桩基径大小呈一定程度的正相关。茶条木伐桩萌蘖具有较强的季节性,萌条死亡率较高,单个伐桩的萌条总数和萌条存活率分别为7.3个和54.9%,两者在砍伐强度相同时随伐桩高度增加而增大。主萌条的平均株高和平均基径分别为168.7 cm和12.38 mm,伐桩萌条平均生长率为40.8%,三者均表现出全伐时随伐桩高度增加而增大、择伐时随伐桩高度增加而下降的特点。根据试验观察结果并结合石漠化区植被恢复的需要,择伐和留桩20 cm是茶条木比较理想的砍伐利用方式。
In order to explore the sprouting characteristics of the pioneer tree species of tea tree stumps in the rocky desertification area, taking the felling intensity and the height of the stumps as factors, the effects of different cutting densities (full and selective cutting) , 40 and 60 cm), and the number of sprouts and their growth. The results showed that after the cutting, the tillering rate and survival rate of the wood-cutting piles were 99.24% and 88.55% respectively. The survival rate of the piles was higher than that of the full cutting, Path size is a certain degree of positive correlation. The tea tree stump has the stronger seasonality and the higher death rate of sprouting. The total number of sprouting and the survival rate of sprouted single-stump is 7.3 and 54.9% respectively. Both of them have the same cutting frequency Pile height increases and increases. The average height and average base diameter of main sprouts were 168.7 cm and 12.38 mm, respectively. The average growth rate of sprouted sprouts was 40.8% With the pile height increases and decreases the characteristics. According to the experimental observations and the need of vegetation restoration in rocky desertification areas, selective cutting and stubble pile spacing are the ideal methods of cutting and utilization of tea tree.