摘要
通过比较河北省木兰围场国有林场管理局森林经营区不同海拔高度油松天然更新及生长情况,研究不同海拔高度对油松天然更新和胸径生长的影响,结果表明：不同海拔高度油松天然更新能力强弱依次为951-1 150m〉750-950m〉1 151-1 350m〉1 351-1 550m〉1 551m以上;而不同海拔高度对天然更新油松的胸径平均年生长量的影响为,0-60a油松在海拔951-1 350m时胸径生长最快,而在750-950m和1 551m以上的海拔区间生长较慢,61-90a油松在7 50-1 550m的海拔高度,胸径平均生长量没有差异,而在1 551m以上,生长量明显下降。
For study the response of Pinus tabulaeformis natural regeneration and diameter growth to altitudes, compares Pinus tabulaeformis natural regeneration and growth on different altitudes in Mulan. The results showed that the ability of Pinus tabulaeformis natural regeneration at different altitude was 951-1 150 m〉750-950 m〉1 151-1 350 m〉1 351- 1 550 m〉 more than 1 151 m,with the fastest annual DBH diameter growth of 0-60 a Pinus at 951- 1 350 m, but slower DBH at 750- 950 m and more than 1 151 m, DBH annual growth of 61-90 a Pinus showed no difference at 750-1 550 re,but decreased significantly at altitudes over 1 551 m.
出处
《河北林果研究》
2015年第1期45-50,共6页
Hebei Journal of Forestry and Orchard Research
基金
河北省林业科学技术研究项目"木兰林区森林流域经营关键技术研究"(1305448)
关键词
油松
天然更新
海拔
胸径
年平均生长量
Pinus tabulaeformis
natural regeneration
altitude
DBH
mean annual precipitation
