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(三)适地适树,科学造林适地适树是保证林木速生丰产,降低造林成本的有效措施。随着林业生产的发展,适地适树的概念和要求,也在进一步发展。现代造林技术不但要求适地适树,而且要求造林地和一定树种的类型(地理种源、生态类型)或品种相适应,即适地适树类型。由不同地理区域采来的种子,即使栽培在相同的条件下,生长和抗性都有显著不同。如澳大利亚栽培的火炬松,其最好的种源的材积
(C) suitable tree, suitable for afforestation science Afforestation is to ensure fast-growing trees yield, reduce the cost of afforestation an effective measure. With the development of forestry production, the concept and requirements of suitable trees are also being further developed. Modern afforestation techniques not only require the appropriate tree, but also require that the afforestation land should be adapted to the type of certain tree species (geographical provenance, ecological type) or species, ie the suitable tree type. Seeds collected from different geographical areas have significant differences in growth and resistance even under the same conditions of cultivation. Such as Australia’s cultivated loblolly pine, the best provenance of the volume