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建立母树林的目的,在于满足当前急需的、较大量的,多少经过遗传改良的种子的需要。选择母树林时,应以其遗传品质不低于平均水平的林分为对象,并以获得种子作为首要目的进行经营。选择和经营母树林的一般原则,前人已有论述。这些原则对针叶树适用,对阔叶树也同样适用。下文将概述选择和经营阔叶树母树林时在方法上与针叶树母树林之间的相异之处,及其要特别注意的问题。林分选择阔叶树常为雌雄异株,在选择林分时,必须确定有相当的、可用的雄株和雌株,间
The purpose of establishing a mother tree is to meet the needs of the currently needed, larger, and more genetically modified seeds. When selecting a parent forest, the forest whose genetic quality is not lower than the average should be targeted and the primary purpose of obtaining the seed is to operate. The general principles of selecting and managing mother trees have been discussed by the predecessors. These principles apply to conifers and to broadleaf trees. The following section outlines the differences between the methodological and coniferous parent woods in the selection and management of broadleaf woods and the issues they require special attention. Stands broad-leaved trees often dioecious in the choice of stand, we must determine a considerable, available male and female plants, between