摘要
建立种子园、母树林，最重要的是获得优良性状的遗传增益。本文通过永仁县白马河林场子代测定林的试验，用“滇中云南松天然优良林分的选择标准和方法”选择出的优良林分，其速生的树高生长量的遗传力为７６％，丰产的蓄积生长量遗传力为４７．４８％，遗传增益为３６．４４％，已经超出项目要求３％的水平。用该方法及标准选择出来的云南松优良林分，可以经过人工改造、建立母树林，用母树林的种子造林，可以改变云南松林分中树干弯曲及木材纹理扭曲的不良特性，还可以提高云南松林分的木材产量。
The most important thing for establishing the seed garden or seed forest is to get thegenetic gains of some favorable characteristics.According to the experiment on filial genera-tion forest at Baimahe forest farm in Yongren county. The selected good stands had the fol-lowing characteristics:the genetic force of height growth which is an index of the fast growthwas 76％,and that of stock growth which is an index of high production was 48％;thegenetic gain was 36.44％,which was much highier than the project objective-supposed to reach 3％.And more over,the selected good stands could be reconstucted in toseed forest.By using the seeds of the selected forest for silviculture,some unfavorable charac-teristics such as bending trunk or grains in the stands of P.yunnanensis canbe modified,and timber output can be increased.
出处
《西南林学院学报》
1994年第4期215-221,共7页
Journal of Southwest Forestry College
关键词
云南松
林分
遗传性状
遗传力
Filial generation determined forest
Genetic characteristic
Genetic force
Genetic gain
Stock growth
