43 湖南省地方标准 ICS CCS 65.020.40 B 65 DB43/T2185—2021 发 布 湖南省市场监督管理局2021-10发布-14 2021-12实施-14Technical regulations for assisted natural regeneration of Cyclobalanopsis glauca secondary forest青冈栎次生林人工促进天然更新 技术规程 DB43/T 2185—2021 I 目 次 前言 ································ ································ ································ ························ Ⅲ 1 范围 ································ ································ ································ ····················· 1 2 规范性引用文件 ································ ································ ································ ······ 1 3 术语和定义 ································ ································ ································ ············ 1 4 郁闭度调整 ································ ································ ································ ············ 2 5 设置梯坎 ································ ································ ································ ··············· 2 6 鼠害防控 ································ ································ ································ ··············· 2 7 人工补植 ································ ································ ································ ··············· 2 8 次生幼林抚育 ································ ································ ································ ········· 2 9 档案管理 ································ ································ ································ ··············· 2 DB43/T 2185—2021 II DB43/T 2185—2021 III 前 言 本文件按照 GB/T 1.1 —2020《标准化工作导则 第1部分：标准化文件的结构和起草规则》的规 定起草。 请注意本文件的某些内容可能涉及专利。本文件的发布机构不承担识别这些专利的责任。 本文件由湖南省林业局提出。 本文件由湖南省林业标准化技术委员会归口。 本文件起草单位：湖南省林业科学院、湖南冠达农林科技有限公司。 本文件主要起草人：魏志恒、程勇、张珉、吴际友、陈明皋、廖德志、陈家法、黄明军、吴哲、吴 其军。 DB43/T 2185—2021 IV DB43/T 2185—2021 1 青冈栎次生林人工促进天然更新技术规程 1 范围 本文件规定了青冈栎次生林人工促进天然更新的郁闭度调整、设置梯坎、鼠害防控、人工补植、次 生幼林抚育、档案管理等各项作业操作规程。 本文件适用于湖南青冈栎次生林的人工促进天然更新。 2 规范性引用文件 下列文件中的内容通过文中的规范性引用而构成本文件必不可少的条款。 其中， 注日期的引 用文件， 仅该日期对应的版本适用于本文件；不注日期的引用文件，其最新版本（包括所有的修改单）适用于本 文件。 GB 6000 主要造林树种苗木质量分级 GB/T 7908 林木种子质量分级 GB/T 15781 森林抚育技术规程 LY/T 2694 青冈栎造林技术规程 3 术语和定义 下列术语和定义适用于本文件。 3.1 梯坎 terrace 在坡度较陡的林地沿等高线人工设置的阶梯状小平台。 3.2 更新间伐 renewal thinning 为林分的天然更新创造良好条件所进行的抚育间伐。 4 郁闭度调 整 4.1 保留母树 保留次生林中干形通直、冠型大、结实能力强的青冈栎母树。 4.2 更新间伐 伐除母树周围的杂灌、杂木、濒死木、枯立木，控制林分郁闭度在 0.4～0.6。 4.3 保护幼树 保护林冠下已有幼树幼苗，更新作业时尽量避免踩伤，宜通过抚育保证幼树幼苗的生长空间和光照