文献类型：期刊文献

中文题名：不同竞争强度下的沙地樟子松天然林树木径向生长及其气候响应

英文题名：Radial growth of Mongolian pine and its response to climate at different competition intensities

作者：SeMyung Kwon[1] 潘磊磊[2] 时忠杰[2] 杨晓晖[2] 张晓[2] 刘艳书[2] 张克斌[1]

第一作者：SeMyung Kwon

机构：[1]北京林业大学水土保持学院,北京100083;[2]中国林业科学研究院荒漠化研究所,北京100091

年份：2019

卷号：38

期号：7

起止页码：1962-1972

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：中国林科院中央公益性科研院所基本科研业务费专项重点项目(CAFYBB2017ZA006);科技基础资源调查专项(2017FY101301);国家自然科学基金项目(31670715)资助

语种：中文

中文关键词：竞争指数;径向生长;气候敏感性;樟子松

外文关键词：competition index;radial growth;climate sensitivity;Pinus sylvestris var.mongolica

分类号：P457

摘要：以呼伦贝尔沙地樟子松天然林为研究对象,采用竞争指数与树木年代学等分析方法,研究了竞争对樟子松树木径向生长及其气候响应的影响。结果表明:竞争显著影响了沙地樟子松树木的生长;竞争能力强的树木主要对当年生长季的月均最高温度、降水和相对湿度响应更加敏感,而竞争能力弱的树木则对前一年冬季月均最低温度、前一年生长季的降水和相对湿度的响应更加敏感;低竞争指数和高竞争指数组的树木,特别是竞争力较强的树木对干旱的响应非常敏感,而中等竞争能力的树木干旱响应较不敏感。综合来看,林木之间的竞争关系对沙地樟子松树木生长及其气候响应具有较显著的影响,本研究可为气候变化背景下樟子松天然林的经营与管理提供一定的科学依据。
To understand the radial growth of Mongolian pine( Pinus sylvestris var. mongolica)and its response to climate at different competition intensities,the tree-ring width chronology and its competition of Mongolian pine in Hulunbuir Sandy Land was analyzed using tree chronology analysis and competitive index. Results showed that competition significantly affected the radial growth of Mongolian pine. For the radial growth,large trees with low competition were more sensitive to the monthly average maximum temperature,precipitation,and relative humidity of the growing season,while small trees with low competition index were more sensitive to the lowest monthly temperature,precipitation and relative humidity in the previous year’s growing season.Drought had greater impact on large trees and small trees than on medium-sized trees,especially on large trees with strong competitiveness. In general,the radial growth and climate response of Mongolian pine in Hulunbeier Sandy Land were significantly affected by the competition. Our results provide scientific basis for the management of natural Mongolian pine forests under the background of climate change.