查询词典 shelterwood

For mature timber st and s, the approaches of selection cutting, clear cutting and shelterwood cutting

成熟的用材林应当根据不同情况，分别采取择伐、皆伐和渐伐方式

For mature timber stands, the approaches of selection cutting, clear cutting and shelterwood cutting

成熟的用材林应当根据不同情况，分别采取择伐、皆伐和渐伐方式

For mature timber stands, the approaches of selection cutting, clear cutting and shelterwood cutting shall be applied respectively in light of different situations.

一成熟的用材林应当根据不同情况，分别采取择伐、皆伐和渐伐方式，皆伐应当严格控制，并在采伐的当年或者次年内完成更新造林

This paper discussed the distribution of forest resources in the tropics, their main types, main characteristics and present management status, and proposed twelve management modes, and these modes include establishing nature conservation region, eco-public-benefit forest management, extravisme, limiting logging and regeneration after logging, logging three and remaining seven method, tropical shelterwood system, sylviculture douce, whole cultivation method, specialized cultivation method, strip clearcutting method, developing tree species of lacking noted and nature regeneration, closing hillsides to facilitate afforestation.

本文对世界热带地区的森林资源分布、基本类型、主要特征、世界次生林的经营现状和主要经营方式讨论。这些经营方式包括建立自然保护区、生态公益林经营、&采掘主义&、限制采伐和伐后更新、&砍三留七&法、&扶持&式育林法、&抑制&式育林法、整体培育法、专门培育法、带状皆伐法、开发欠知名树种、自然更新和封山育林。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。