刺槐蜜源林培育技术研究

The Cultivation Technique of Black Locust Nectariferous Forest

对大量临时标准地和固定样地的调查研究表明：刺槐个体开花量主要受自身遗传特性制约，同时受光照等环境条件影响，其无花和少花个体所占比例约为２０．３％；蜜源林的培育可采用以间伐代修枝的办法，采取以下层间伐抚育为主的方式，疏伐无花和少花个体，保留单株及林冠层的最大有效枝量；利用具有高产遗传特性的个体或高蜜源品系，逐步更新改造现有蜜源林；蜜源林培育的合理郁闭度为０．６～０．８，适宜培育周期为１５～２０ａ。

The investigation results for abundant temporary and permanent plots show that the flower mass of individual tree is mainly determined by its genetic factor, and also affected by environmental conditions such as sunlight. No flower or few flower trees are about 20 3% in the population. The pruning of nectariferous forest should be replaced by thining, reserving efficient shoot in canopy class. Cut no flower and few flower individuals. The present nectariferous forest should be regenerated by high yield trees or new varieties. Its reasonable canopy density is 0 6～0 8, the management period is 15～20 a.