建立种子林是林业生产良种化的一项措施。种子林是生产优质种子的林分,是从现有生长良好的林分,通过留优去劣,疏伐改造,精细管理,促进结实,以生产种子为主的林分。中龄林改建的种子林,能长量增产种子,是当前采种的主要依靠;幼龄林改建的种子林,能在较短时间内生产种子,使结实层降低,有利采种;用优良母树种子培育的一级壮笛,新营 Establishing seed forests is a measure of improved seed production in forestry. Seed forest is the production of high-quality seeds of the stands, is from the existing good growing stand, through the retention to poor, thinning transformation, fine management, and promote strong, to produce seed-based stand. Middle-aged forest rebuilt seed forest, can increase the production of seeds in large quantities, is the main relying on the current seed; young forest rebuilt seed forest, can produce seeds in a relatively short period of time, so that the stratum corneum is reduced, favorable seed; with good mother tree seeds Cultivation of a first-class health flute, new camp