江西金盆山林区米槠生长过程与幼林生长效应

进行样地调查与树干解析,以研究米槠生长过程。采用米槠容器苗和裸根苗造林,比较造林保存率、胸径、树高、冠幅、变异系数等指标,以了解两种苗木的幼林生长效应,并比较天然林与人工林米槠的早期生长。研究表明,米槠在10-20 a,树高、胸径生长较快;14-30 a,材积生长较快;树龄33 a时,尚未达到数量成熟阶段。米槠容器苗造林的保存率、胸径、树高值均大于裸根苗,其中保存率比裸根苗高9.5%,胸径值大11.3%,树高值大4.6%。比较人工林和天然林的早期生长,人工林树高和胸径值均大于天然林。米槠容器苗造林,可以促进米槠生长,取得较好的造林效果。

Growth Process and Young Plantation Growth Effect of Castanopsis carlesii in Jinpenshan Forest Region of Jiangxi Province

Using the methods of sample-plot survey and stem analysis, in order to study the growing process of Castanopsis carlesii. Experiments were conducted on afforestation of C. carlesii by 2-year-old bare-rooted and container seedlings, the indexes of afforestation survival rate, diameter breast height, height, tree crown, coefficient of variation were compared, the effect of growth for two seedlings was studied, and the early growth of natural forests and plantations of C. carlesii was compared. The results showed that C. carlesii diameter breast height, tree height grow faster at 10 to 20 years, volume growth more quickly at 14 to 30 years, when 33-year-old forests have not yet reached the stage of quantitative maturity. The survival rate of afforestation, diameter breast height, tree height values with container seedlings C. carlesii were more than bare root seedlings. The survival rate, diameter breast height, tree height was 9.5%, 11.3%, 4.6% higher than that of the bare root seedlings. Compared to the early growth of plantations and natural forests, tree height and diameter breast height of plantation were greater than that of natural forests. Container seedlings afforestation can promate the growth of C. carlesii and achieve better effect.