宁夏贺兰山天然林油松育种主要性状的初步研究

A PRELIMINARY STUDY ON THE MAIN CHARACTERS FOR BREEDING OF NATURAL FOREST OF PINUS TABULACFORMIS CARR IN HELAN MOUNTAIN

本文对宁夏贺兰山天然林油松育种主要性状进行了初步研究,结果表明:生长量性状大小的顺序是树高、冠幅、枝下高、胸径、材积和第一主侧枝粗细;形质指标的大小顺序是健康状况,干型、生长势、树皮性质和结实等级;育种主要生长量性状对材积的影响大小顺序是胸径、树高、冠幅、侧枝粗细和枝下高。

The main characters for breeding of natural forest of pinus tabulacformis carr in Helan Mountain of Ningxia have been studied. The results showed that the order of characters of increment was tree height, tree crown,branch height, breast diametre, volume and diameter of the first main branch;and the order of quality index was health condition,stem form, growing power,tree face quality and fruiting yield.The order of effects of main characters of increment on volume was brest diameter,tree height,tree crown ,diameter of first main branch and branch height,respectively.