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油松(Pinus tabulaeformis carr)是河南省山区的主要造林树种,育苗、造林用种量大。由于种子不足,影响造林计划的完成。又由于种源不明和负向采种,用种品质差,致使造林成活率低,林木质量差。因此改善油松用种状况,是急待解决问题。一、种子园营建技术 (一)优树选择标准、方法优树是指在相同立地条件和经营措施完全相同的同龄林中,生长和遗传品质特别优良的单株。而优树选择就是从基本种群内,根据育种目标,按表型进行单株选择,并从
Pinus tabulaeformis carr is the main tree species in mountainous area of Henan Province. Due to lack of seeds, the completion of the afforestation plan will be affected. And because of unknown provenance and negative seed, poor quality of planting, resulting in low survival rate of afforestation, poor quality of trees. Therefore, the improvement of Pinus tabulaeformis situation is an urgent solution to the problem. First, the seed garden construction technology (A) superior tree selection criteria, method You-tree refers to the same site conditions and the same management practices in the same age of the same plant, growth and genetic quality is particularly good single plant. The tree selection is from within the basic population, according to breeding objectives, according to the phenotype of individual selection, and from