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森林更新方式一般分为()、()和人工促进天然更新三种。...
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Tuesday, April 16, 2024
()是林场内最基本的经营单位,也是森林资源清查、统计计算和管理最...
Monday, September 12, 2022
()是一种高度集约的经营方式,在瑞士和北欧许多地方一直持续至今,森林资源的连续清查和其他定期调查都是在此基础上发展起来的。A、材积平分法B、面积轮伐法C、检查法D、龄级法...
Sunday, April 28, 2024
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影响择伐周期的因素有:择伐强度、树种特性()立地条件 。...
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补充主伐是按各经营类型可以进行采伐利用的疏林、散生木和母树,分别计算其采伐量。...
Sunday, February 12, 2023
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Monday, September 12, 2022
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Sunday, February 12, 2023
Wednesday, April 26, 2023
Wednesday, September 14, 2022
数量成熟是指林分蓄积或材积平均生长量达到最大时的状态。当到达数量成熟龄时,平均生长量和连年生长量()...
Thursday, October 27, 2022
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