临夏85号杨树生长规律初步研究

A study on growth regulait of Populus בLinxia-85’

以青杨作为对照,对12年生临夏85号杨的年生长及幼树生长状况进行分析,临夏85号杨有如下特点:①生长季推迟10～15 d,年生长期延长20 d;②对环境反应敏感,对夏秋雨水利用较充分,水、光、热协调复合,可促进其生长;③材积生长量较对照提高88.98 %,数量成熟期为22年;④速生期较长,适于培育中大径材及丰产栽培。

This article analyses annual growth and young tree growth aboutPopulusבLinxia-85’at age of 12 years using P.cathayana Rehd as check the PopulusבLinxia-85’has some characteristics: ①Growth season put off 10～15 d. Growth period for every year prolong 20 d. ②It is sensitive to the change of outside environment. It can make full use of summer-autumn rainwater in the locality. To accelerate growth, it utilizes water, light and heat coordinatly. ③The volume growth of the young-tree improves 88.98 % than the check.The mature period of quantity is twenty-two years. ④The quick growth period is longer than the check.Middle-big diametertree and bumper crop cultivation is fit for it.