三北防护林退化现状及成因分析——以乌拉特中旗为例  

Current Status and Causes of Degradation of the Three-NorthShelter Forest: A Case Study of Urad Middle Banner

作　　者：郭建光 宋向阳 席彦飞 赵月平 GUO Jianguang;SONG Xiangyang;XI Yanfei;ZHAO Yueping(Urad Middle Banner Forestry and Grassland Bureau,Bayannur Urad Middle Banner 015300,Inner Mongolia,China;Key Laboratory of Grassland and Agricultural Eco-Remote Sensing,Hohhot 010051,Inner Mongolia,China;Inner Mongolia Zhongqing Engineering Consulting Co.,Ltd.,Hohhot 010020,Inner Mongolia,China;Ulanqab City Forestry Work Station,Ulanqab 012000,Inner Mongolia,China)

机构地区：[1]乌拉特中旗林业和草原局,内蒙古乌拉特中旗015300 [2]草地与农业生态遥感重点实验室,呼和浩特010051 [3]内蒙古中轻工程咨询有限公司,呼和浩特010020 [4]乌兰察布市林业工作站,内蒙古乌兰察布012000

出　　处：《内蒙古林业调查设计》2024年第2期67-71,共5页Inner Mongolia Forestry Investigation and Design

摘　　要：三北地区是我国典型的干旱、半干旱地区,经过几十年的防护林建设,进入了林木自然演替和更新时期,三北地区的林木退化问题也日益凸显。为准确和真实地反映三北防护林体系退化现状和成因,以乌拉特中旗为研究对象,通过对其三北工程建设现状和退化状况研究分析,得出结论:乌拉特中旗三北防护林退化程度以重度退化为主,主要原因为灾害,尤以旱灾为主;乌拉特中旗退化乔木林以杨树为主,经过20 a的工程建设,杨树进入了自然成熟期,按照其生长规律,进入成熟期后其生理机能衰退,单位面积蓄积量下降,防护效能降低,退化属于自然演替的过程。The Three-North region is a typical arid and semi-arid area in China.After decades of shelter forest construction,it has entered a period of natural succession and renewal of trees,and the issue of tree degradation in the Three-North region is becoming increasingly prominent.To accurately and truly reflect the current status and causes of the degradation of the Three-North shelter forest system,this study takes Urad Middle Banner as the research object.Through the study and analysis of the current status and degradation of its Three-North project construction,the conclusion is drawn:the degree of degradation of the Three-North shelter forest in Urad Middle Banner is mainly severe,mainly due to disasters,especially drought;the degraded arbor forests in Urad Middle Banner are mainly poplar trees.After 20 years of project construction,the poplar trees have entered their natural maturity period.According to their growth laws,after entering the maturity period,their physiological functions decline,the storage volume per unit area decreases,the protective efficiency is reduced,and the degradation belongs to the process of natural succession.

关 键 词：三北工程 防护林退化 现状 成因 

分 类 号：S727.2[农业科学—林木遗传育种]