... forest tree improvement 林木改良 forest tree propagation 林木繁殖 forest-tree 森林树木 ...
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目前为了尽快的缩短林木育种周期并为林业生产尽早地提供优良繁殖材料，经常采用的方法就是林木早期测定。
At present, early test in tree breeding is often used in order to shorten breeding term and provide the excellent materials for forest production as soon as possible.
一个主要的原因就是不像一年生植物，大多数林木经过砍伐之后，不能马上繁殖。
A principal reason was that most trees, unlike annual plants, cannot readily be propagated from cuttings.
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