米老排在漳州长泰生长规律初步研究

Growth Law of Mytilaria laosensis In Changtai County of Zhangzhou City

对由广西凭祥引进,种植于长泰的23年生的米老排进行树干解析,研究其生长规律,结果表明:林分平均胸径17.9cm,平均树高18.6m。胸径连年生长量高峰值出现在3~4年,长期保持在0.6~0.8cm;树高连年生长量高峰值出现在11~12年,至23年时连年生长量仍然大于0.6m;10年后材积生长迅速,15年时连年生长量大于0.01m^3,19年后大于0.02m^3,在23年时尚未达到数量成熟,培育潜力较大。研究区上坡的米老排早长早衰,中下坡表现为生长较慢但后劲更足。研究认为适度集约经营有利于该树种的速生丰产,推广营造混交林,先间伐其他树种,保留米老排继续培育中大径材有利于充分发挥该树种的优良特性。

Twenty three-year-old Mytilaria laosensis which were introduced from Pingxiang City of Guangxi Zhuang Autonomous Region to Changtai County were conducted stem analysis to study its growth law.It was found that the mean stand diameter tree height is 17.9cm ＆18.6m,respectively.The peak value of DBH annual increment appears during 3-4a,kept among 0.6-0.8cm;the peak value of height annual increment appears during 11-12a;the annual increment is still greater than 0.6mat 23a;the volume grow quickly after 10a;the mean increment is greater than 0.01m^3 at 15a;the annual increment is greater than 0.02 m^3 after 19a;Mytilaria laosensis didn＇t reach the number of mature at 23 a,having great potential for culture.Mytilaria laosensis grow and decline early uphill in the study area and shows slower growth downhill,but more stamina.Studies suggest that moderately intensive farming is in favor of fast growing tree species;promoting mixed forest＋thinning other species firstly＋ culturing large-diameter timber of Mytilaria laosensis are favor to give full play to the excellent characteristics this species.