LYT 3178-2020 西北华北山地次生林经营技术规程.pdf

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1、ICS65.020.40B64LY中华人民共和国林业行业标准LY/T3178—2020西北华北山地次生林经营技术规程TechnicalRegulationofSecondaryForestManagementinthemountainareasofNorthwestandNorthChina2020-03-30发布2020-10-01实施国家林业和草原局发布LY/T3178—2020目次前言..............................................................

2、......................................................................................................II1范围........................................................................................................................................................

3、......12规范性引用文件..........................................................................................................................................13定义和术语...................................................................................................

4、...............................................13.1天然林经营模式Naturalforestmanagementmodels..............................................................13.2林分经营Stand-orientedmanagement..............................................................................

5、.............13.3林分拥挤程度Standcrowdeddegree..........................................................................................13.4幼树开敞度Theopendegreeofsaplings..............................................................................13.5单株木经营Tree-orie

6、ntedmanagement.........................................................................................23.6针叶树为主的针阔混交林Coniferousandbroad-leavedmixedforestwithconiferous-dominated.................................................................................

7、..........................................................................23.7阔叶树为主的针阔混交林Coniferousandbroad-leavedmixedforestwithbroad-leaveddominated.............................................................................................................

8、..............................................23.8针阔均衡的针阔混交林Coniferousandbroad-leavedmixedforestwithonbalance.23.9特大树Verybigtrees..........................................................