摘要
浙江省龙泉市林科所杉木地理种源试验林保存了１９个种源。对该所１４年生不同种源试验林分的测定和分析结果表明：杉木胸径（ｘ）与冠幅（ｙ）相关紧密，最佳回归方程为ｙ＝ａｘｂ。通过检验，可把１９个种源归类于南亚热带、中亚热带和北亚热带３个总体，分别获得的杉木林经营密度指标和树冠可重叠系数，可以应用于全国杉木林的抚育间伐。
There are 19 provenances in the Chinese fir forests of provenance test made by Forestry Research Institute of Longquan City,Zhejiang Province The measurement and analysis of 14 years old stands show that relationship between DBH(x)and crown width(y)is closely and can express it with y=ax b According to the statistical tests,19 provenances can divide into 3 groups of the south subtropics,the middle subtropics and the north subtropics The density targets of management and crown overlappable coefficients obtained respectively can make reference use of thinning for Chinese fir forests all the country
出处
《浙江林学院学报》
CSCD
1998年第2期131-137,共7页
Journal of Zhejiang Forestry College
关键词
杉木
种源
经营密度
树冠可重叠系数
回归分析
Chinese fir(Cunninghamia lanceolata)
provenance
density of management
crown overlappable coefficient
regression analysis
