图强林业局地处我国北部高寒地带,苗木生长周期较短,难以提高产量。为延长苗木生长周期,采用温室育苗与大地换床相结合的方法,当年就可培育出高产、优质上山苗,现将方法简述如下。 Tuqiang Forestry Bureau is located in the alpine region of northern China, seedling growth cycle is shorter, it is difficult to increase production. In order to extend the growth cycle of nursery stock, the method of combining greenhouse seedling with land changing bed can be used to cultivate high-yielding and high-quality seedling in the current year. The method is briefly described as follows.