摘要
对长白落叶松大径材定向培育的试验表明:25 a生长白落叶松间伐后8 a的生长变化以525株.hm-26、00株.hm-2的保留密度生长量最大,胸径年生长量在0.5-0.6 cm以上,年材积平均生长量在7.6 m3.hm-2以上;培育大径材的初植密度以2 500株.hm-2或3 300株.hm-2为宜。
The trial on directive breeding of Larix olgensis for large dimension timber shows following results： After thinning 8 years to the stand at 25 - yr- old, the most growth increment has been gained while reserve density at 525trees·hm^-2 and 600 trees·hm^-2 , mean annual growth in diameter and in volume are 0.5 -0.6 cm and 7.6 m^3·hm^-2, respectively. It concluded that the initial density should be 2 500 trees·hm^-2 or 3 300 trees·hm^-2 for the large dimension timber of Larix olgensis.
La
出处
《吉林林业科技》
2007年第1期34-35,38,共3页
Journal of Jilin Forestry Science and Technology
关键词
长白落叶松
大径材
定向培育
rix olgensis
large dimension timber
directive breeding
