巴山松优良单株选择和等级划分  

The Selection and Grade Definition of Fine Pinus henriyi Mast

作　　者：张晓明[1] 李军 胡盛华[1] 楚金强[1] 袁强[1] 

机构地区：[1]汉中市林业工作中心,陕西汉中723000 [2]南郑县天然林保护中心,陕西南郑723100

出　　处：《陕西林业科技》2007年第1期11-13,共3页Shaanxi Forest Science and Technology

摘　　要：采用3株大树法,在优良林分中选择优良单株67株,以材积为主,附加形率、树冠因素,分级评分,按总分值将优树划分为五个等级。By three-big tree method, 67 fine trees Were selected. On the condition of timber volume, plus other factors like form quotient and crown as well, they can be divided into 5 grades.

关 键 词：巴山松 选优 等级 

分 类 号：S791.259.06[农业科学—林木遗传育种]