摘要
对广西南宁良凤江森林公园内12、25、26、31、45、46年生降香黄檀的生物量进行测定,并进行模型拟合,得出各器官及单株生物量的最优方程。结果表明:45年生降香黄檀单株生物量最大,为237.43 kg,并且降香黄檀的生物量、干形及心材在相同年限差异显著;46年生降香黄檀心材直径平均值为10.7 cm,心材年增长速率为1.11%,最大心材比例出现在第38年。总体上胸径对于生物量的贡献值大于树高,树干生物量、根蔸生物量分别占降香黄檀地上、地下生物量的绝大部分,树干生物量最优方程为Y=0.013D2.941,单株生物量最优方程为Y=-190.668+23.631D-0.208D2。
In this paper,the biomass of 12 year,25 year,26 year,31 year,45 year and 46 year Dalbergia odorifera T. chen in Liangfengjiang forestry park of Nanning, Guangxi were studied, and found out the optimal equation with model fitting for various organ biomass and single plant biomass. The results showed that ： per plant biomass of 45 year Dalbergia odorifera T. chen up to 237.43 kg was the maximum value, and biomass, stem form and heartwood were in significant difference was found in the same age. The average heartwood diameter of 46 year Dalbergia odorifera T. chen diameter was 10.7 cm, heartwood＇s annual growth rate was 1.11% , the biggest rate of heart/sapwood was appeared on the 38 years. The DBH＇s contribution value to the biomass was greater than the height, at the same time the biomass of trunk and root hill were respectively most of the biomass of above-ground and below-ground of Dalbergia odorifera T. chen. Finally concluded the optimal equation for trunk biomass was Y = 0. 013 D^2.941, and single plant biomass was Y= - 190. 668 ＋23. 631 D -0. 208 D^2.
出处
《福建林业科技》
2016年第2期41-48,共8页
Journal of Fujian Forestry Science and Technology
基金
广西自然科学基金资助项目(2012jj AA30094)
关键词
降香黄檀
生物量
拟合方程
心材生长规律
Dalbergia odorifera T. chen
biomass
curve fitting
growth rate of heartwood
