民勤绿洲杨树林带生长特性及更新年龄初探  

A Preliminary Study on Growing Characteristic and RegenerationAge of Populus shelterbelt in Minqin Oasis

作　　者：张锦春[1] 汪杰[1] 李爱德[1] 俄有浩[1] 

机构地区：[1]甘肃省治沙研究所，甘肃 武威 733000

出　　处：《甘肃林业科技》2000年第4期1-6,共6页Journal of Gansu Forestry Science and Technology

摘　　要：通过对民勤绿洲二白杨和新疆杨林带生长状况调查及单株解析木分析表明 :杨树林带生长迅速 ,高生长进程具有前期速生性 ,5年生树高可达 1 0 m左右 ,1 5龄树高生长已稳定在 1 4～ 1 9m,平均连年生长量为速生期的 1 /3,基本达到了防护成熟状态 ;径生长和材积生长都具有后期速生性 ,速生期可延长到 2 0年以后 ,年均径生长量为 1 .0～ 1 .5 cm,年均材积生长量为 0 .1～ 0 .3m3;最后以林带的防护成熟、经济成熟和数量成熟综合分析确定新疆杨和二白杨林带更新年龄分别为 2 5年和 2 0年。The result of investigating growth and sample tree analysis of populus alba L.var. and populus gansuensic. In Minqin oasis shows that populus shelterbelt grow fast in the first several years: the 5 year old is about 10 m and the 15 year old is about 14~19 m, average annual height growth of the 15 year old is 1/3 mutiples of that in the faster growth stage, which is near the protection maturity especially the height growth; the high growth of diameter and volume are late, which aren't stop before 20 years old, the annual diameter growth is about 1.0～1.5 cm and annual volume growth is 0.1～0.3 m 3; At last, on the basis of comprehensive analysis of protection maturity, economic maturity and numerical maturity of populus shelterbelt, the regeneration age of populus alba L.var. and populus gansuensic is 25 years and 20 years respectively.

关 键 词：民勤绿洲 杨树林带 速生性 更新年龄 农田防护林 

分 类 号：S727.24[农业科学—林木遗传育种] S792.11[农业科学—林学]