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杨树丰产林的补植,是提高林分质量,保证速生丰产的重要措施。1.补植苗木质量要好。杨树生长迅速,树龄相差一年就容易被自然淘汰。所以,补植苗木规格,必须是与林分同龄或高一龄的健壮大苗,而且要求根系发达,树冠匀称,顶梢完整,无病虫,长势旺盛。一般不可补植低于林龄的根桩苗。如果补植量很大,为降低成本,可以补植一年生特别好的根桩苗或二年生一般根桩苗,并在补植的同时将幼林全部平茬。
Poplar tree planting replanting, is to improve the quality of the forest to ensure fast-growing and important measures. 1. replant seedling quality is better. Poplar grow rapidly, the difference between the age of one year is easy to be eliminated naturally. Therefore, replanting seedlings specifications, must be the same age with the forest or the age of a strong seedlings, but also requires well-developed roots, symmetrical crown, top complete, no pests, growing strong. Generally not replantation below the age of the root pile seedlings. If a large amount of replanting, in order to reduce costs, you can replant particularly good rootstock annual perennials or perennial root stump seedlings, and replanting at the same time all young stubble.