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一、母树林选择,母树林就是从天然或人工林分中选择优良林分,调查设计,加以标记,留优去劣,加强管理,促进结实,以生产遗传品质得到某种程度改良的种子的林分.又叫种子生产区.也可以用优良树木的种子育苗造林建立.母树林是良种繁育的初级形式.它有以下优点:建成的时间短,投产早,种子起源清楚种子产量高,遗传品质有一定程度的改良,便于经营管理,以及产量予测、种子采收和病虫害防治等工作.据报导用母树林的种子培育的林木,增益5%以上.而且在林木生长的一致性、树形及抗性等方面,其效果也较显著.当前林木种子需要量大,而种子园正在建设的情
First, the selection of mother trees, mother forests is from the natural or artificial forest in the selection of good stands, survey design, to mark, stay good to bad, strengthen management, and promote strong, to produce genetic quality to some extent improved seeds Stands, also known as seed production areas, can also be established with excellent tree seedling nursery afforestation, which is the primary form of seed breeding and has the following advantages: short build times, early start of production, clear seed origin, high seed yield, The quality of a certain degree of improvement, ease of management, as well as yield measurement, seed collection and pest and disease control and other work.It has been reported that the mother tree forest seedling cultivation, gain of 5% or more.And in the growth of the tree consistency, the tree Shape and resistance, etc., the effect is more significant. At present, the demand for forest seed is large, and the seed garden is under construction