检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:彭志杰 PENG Zhijie(Hebei Saihanba Machinery Forest Farm,Chengde 068450,China)
出 处:《安徽农学通报》2023年第22期74-79,共6页Anhui Agricultural Science Bulletin
摘 要:本文介绍了塞罕坝机械林场的地理及气候特征、森林资源结构,对其乔木林面积、蓄积、林种和树种等构成进行了分析,从单位面积蓄积、单位面积生长量、径阶和密度等方面对其森林质量进行了评价。塞罕坝机械林场依据生态服务、森林安全和林产品产出等需求,采取了培育优质资源、调整人工林资源结构和改培低效天然次生林等经营技术。经过多年持续努力,塞罕坝机械林场乔木林面积大幅增加,宜林地和无立木林地面积减少,活立木蓄积持续增长,为经济社会发展提供优质木材。This article provides a detailed introduction to the geographical and climatic characteristics,forest resource structure,and composition of the Saihanba machinery forest farm.It analyzes the area,volume,forest species,and tree species of its tree forest,and evaluates its forest quality from aspects such as unit area volume,unit area growth,diameter order,and density.Saihanba machinery forest farm has adopted management technologies such as cultivating high-quality resources,adjusting the structure of artificial forest resources,and transforming inefficient natural secondary forests based on the needs of ecological services,forest safety,and forest product output.After years of continuous efforts,the area of tree forests in Saihanba machinery forest farm has significantly increased,while the area of suitable and non standing forests has decreased.The stock of standing trees has continued to grow,providing highquality wood for economic and social development.
分 类 号:S750[农业科学—森林经理学]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:3.147.44.46