摘要
在四川省泸州市泸县和广元市元坝区采用沙床播种、温棚催芽、切根移栽、容器培育的方法进行刚火松育苗试验 ,结果表明 :泸县和元坝刚火松 1a生平均苗高分别达 1 3 8cm和 1 3 4cm ,比对照本地马尾松大 1 7. 9%和1 1 . 7%。两个试验点间刚火松平均苗高无显著差异 ,元坝苗高的变异幅度大于泸县。Logistic曲线、对称及不对称S形曲线均可准确描述刚火松 1a生实生苗的高生长过程 ,得出的苗高生长量累积百分率 (y)及其概率单位 (p)依生长天数 (x)的 3个回归方程 :y =1 0 0 /(1 +1 9 .391 8e-0 . 0 3 2 3x) ,p =3. 32 0 2 +0 . 0 1 81x和 p =- 2 . 31 1 2 +3 .86 91lgx ,其相关系数r和回归F值均达极显著水平。
The seedlings from the hybrid of Pinus rigida ×P. taeda had been raised by sowing on a sand bed in a plastic chamber and then transplanting germinants into contaniners immediately after cutting main roots of the genninants in counties Luxian and Yuanba of the Sichuan Province. The results showed that mean heights of one year old seedings were 13.8cm and 13.4cm in Luxian and Yuanba, respectively, which were 17.9% and 11.7% taller than P. massoniana. There was no significant difference between the mean heights in the two sites, while heights of individual seedlings varied more in Yuanba than in Luxian. To fit annual increments of the seedlings, the Logistic curve and the symmetric and non-symmetric S-shaped curves have been applied to construct 3 regression equations of accumulated height increment percentagesdays（ x ） . With correlation coefficients（r） and slopes（F） significant at a level 〈 0.01, all of the 3 equations that are y = 100/（ 1 ＋ 19.3918e^-0.0323x） ,p = 3.3202 ＋ 0.0181x and p =-2.3112 ＋ 3.8691 lg x，were exactly fitted.
出处
《林业科技开发》
2005年第2期17-20,共4页
China Forestry Science and Technology
基金
四川省农作物育种攻关项目 (2 0 0 1~ 2 0 0 5)子专题"湿加松
刚火松引种与选育"的部分研究内容。
作者简介
王启和（1954-），男，四川成都人，高级工程师，主要从事林木育种和栽培研究。
