STH
发表于 2025-3-21 18:07:06
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anachronistic
发表于 2025-3-21 22:10:39
Past, Present, and Anticipated Applications of Clonal Forestry,creases in world population and the striving of peoples to maintain or increase their standards of living. The supply of wood is threatened by overcutting in many regions, and in some areas the near-complete destruction of natural forests threatens other values. More intensive and aggressive forest
唤起
发表于 2025-3-22 01:05:40
Conservation of Germplasm in Forest Trees,dities. As dominant members of many natural ecosystems, they play keystone ecological roles in plant and animal communities. As habitat for other organisms, forests are a reservoir of great natural diversity. In themselves, trees contribute taxonomic diversity through a wealth of species, from rare
宽大
发表于 2025-3-22 05:21:46
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纤细
发表于 2025-3-22 09:37:38
Strategies for Clonal Forestry with Poplars, Aspens, and Willows,cal, and physiological characteristics. Due to their fast growth and the fact that they may be planted on many and varied sites both in and out of forests, poplars, aspens, and willows offer ample possibilities, especially in the temperate zones, of providing additional sources of raw material and t
appall
发表于 2025-3-22 14:31:14
Strategies for Clonal Forestry with Norway Spruce,and eastern Canada has been expressed; in some areas of this region, its growth and other qualities exceed the indigenous species (Fowler 1979). Norway spruce is fast-growing and healthy, with diversified uses for pulp as well as for sawtimber. Its rotation times are between 50 years in central Euro
appall
发表于 2025-3-22 18:29:38
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意外
发表于 2025-3-22 22:39:11
Arguments for Redwood Clonal Forestry,edwood (.). Stump sprouts, or sometimes stem sprouts or root sprouts or adventitious shoots, produce multiple copies of successful clones in local clumps for two, three, or even more generations, occupying that site for centuries or even millenia (Fig. 1).
auxiliary
发表于 2025-3-23 05:26:51
Organization and Implementation of a Clonal Forestry Program,ttributed to three main factors: (1) the demonstrated growth of improved hybrid poplar clones in field tests, (2) the developing wood supply shortage of a local pulp and paper mill, and (3) the availability of a large surplus of idle agricultural land suitable for reforestation with hybrid poplar.
秘传
发表于 2025-3-23 07:52:19
Policies, Regulations, and Laws Affecting Clonal Forestry,ernational seed trade was expanding and it was realized that there should be regulation to protect forest regeneration from unsuitable seed sources. In 1957, the Federal Republic of Germany amended the rules in which the minimum requirement for approval of basic material, including sealing and label