林分密度对30年生杉木人工林生长的影响

通过对福建省大田梅林国有林场30年生不同林分密度杉木人工林生长调查,结果表明,林分密度对杉木生长存在影响,密度为450、540和630株.hm-2的林分平均胸径分别为26.69、23.46和22.50 cm,差异显著,平均树高分别为20.33、18.78和17.29 m,差异不显著。从单株材积、蓄积量、出材量和出材质量看,林分密度以450株.hm-2最佳。

Impact of different density on the growth of 30-year-old Chinese fir plantation

The growth of 30-year-old Chinese fir plantations of different densities in Da-tian Meilin State-Owned Forst Farm of Fujian Province was surveyed and the results showed that the density had a significant impact on the growth of Chinese fir,and the average DBHs of 450 plants·hm-2,540 plants·hm-2 and 630 plants·hm-2 Chinese fir plantations were 26.69 cm,23.46 cm and 22.50 cm,and the average heights were 20.33 m,18.78 m and 17.29 m.In the regards of the individual volume,accumulation,amount of timber-producing and timber-producing quality,450 plants·hm-2 was the best planting density.