论文部分内容阅读
泡桐为我国的重要造林树种,总株数巳达七亿株左右,农桐间作面积2200万亩,遍及20多个省(区、市),已推广的泡桐良种约2亿多株。据估计,全国至少还可发展泡桐10亿株。如能选用优良无性系造林,木材增产的潜力是很大的。为了对已经推广的和将要推广的优良无性系的社会经济效益进行估计,就需要对泡桐的主要性状遗传力及其它遗传参数进行研
Paulownia is an important afforestation tree species in our country. The total number of trees has reached about 700 million and the inter-cropping area of the tree is about 22 million mu. It has spread to more than 20 provinces (autonomous regions and municipalities) and has been popularized about 200 million paulownia. It is estimated that there will be at least one billion paulownia in the country. If you can choose good clones afforestation, timber production potential is great. In order to estimate the socio-economic benefits of clones that have been promoted and will be popularized, it is necessary to study the heritability and other genetic parameters of the main characters of paulownia