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石漠化地区先锋树种茶条木伐桩的萌蘖特性(PDF/HTML)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2015年03期
Page:
65-70
Column:
研究论文
publishdate:
2015-05-30

Article Info:/Info

Title:
The stump sprouting characteristics of the pioneer tree Delavaya toxocarpa in rocky desertification region
Article ID:
1000-2006(2015)03-0065-06
Author(s):
LYU Shihong HUANG Fuzhao ZENG Danjuan XU Guangping LI Xiankun
Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region &
Chinese Academy of Sciences, Guilin 541006, China
Keywords:
rocky desertification region pioneer tree species sprouting characteristics Delavaya toxocarpa
Classification number :
S723
DOI:
10.3969/j.issn.1000-2006.2015.03.013
Document Code:
A
Abstract:
In order to explore the stump sprouting characteristics of a pioneer tree, Delavaya toxocarpa, in rocky desertification region, the present study investigated the survival percentage of the stumps, sprout number and sprout growth increment under different cutting intensity(clear cutting and selective cutting)and stump height treatments(20, 40 and 60 cm). The results showed that the sprouting rate and survival percentage after one-year cutting were 99.24% and 88.55%, respectively. The survival percentage of stumps indicated the trends that selective cutting was greater than clear cutting, the higher stump was greater than lower stump, and there was a positive relationship between base diameter and the stump survival percentage.The number of sprouts produced by stump changed with seasons, and the mortality rate of sprouts was high. The average number of sprouts produced by per stump and the survival percentage were 7.3 and 54.9%, respectively. Both of them increased with the increasing of stump height under the same cutting intensity. The mean plant height, base diameter and growth rate of the biggest sprout were 168.7 cm, 12.38 mm and 40.8%, respectively. All of them increased by clear cutting with the increasing of stump height, and decreased by selective cutting with the increasing of stump height. According to the experimental results and the needs of vegetation restoration in rocky desertification region, the method of selective cutting with stump height 20 cm maight be an ideal way for logging utilization of Delavaya toxocarpa.

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Last Update: 2015-05-30