杉木混交火力楠、米老排生长效果分析

Analysis on Growth Effect of Cunninghamia Lanceolata Mixed with Michelia Macclurei and Mytilaria Laosensis

本文通过调查分析福建省永安国有林场30年生杉木混交火力楠、米老排试验林,结果表明:杉木与火力楠、米老排混交林中的杉木平均树高、胸径、单株立木材积、林分单位面积蓄积量,分别比杉木纯林增加3.1%-3.7%、9.4%-10.5%、34.2%-37.1%、4.1%-23.5%。6杉木4火力楠混交林,杉木平均树高16.8m、胸径18.9cm^(3),林分单位面积蓄积量319.65m^(3)/hm^(2);5米老排5杉木混交林,杉木平均树高16.9m、胸径18.7cm,林分单位面积蓄积量379.35m^(3)/hm^(2)。2种混交林生长效果均超过福建省杉木中心产区Ⅰ立地级中径材林分生长量指标,尤以杉木米老排混交林效果为优,可在永安市及其周边中亚热带地区推广应用。

This paper investigated and analyzed the 30-year-old mixed forest of Cunninghamia lanceolata with Michelia macclurei and Mytilaria laosensis in Yongan State-owned Forestry Farm of Fujian Province,the results showed that the average height,DBH,volume of stand per plant and volume of stand per unit area of Cunninghamia lanceolata with Michelia macclurei and Mytilaria laosensis mixed forest increased by 3.1%-3.7%,9.4%-10.5%,34.2%-37.1%and 4.1%-23.5%respectively,compared with that of pure Cunninghamia lanceolata forest.The average height,DBH and volume of stand per unit area of 6 Cunninghamia lanceolata with 4 Michelia macclurei mixed forest were 16.8 m,18.9 cm^(3),and 319.65 m3/hm^(2).The average height,DBH and volume of stand per unit area of 5 Cunninghamia lanceolata with 5 Mytilaria laosensis mixed forest were 16.9 m,18.7 cm and 379.35 m^(3)/hm^(2).The growth effects of the two kings of mixed forests is better than the growth index of middle diameter timber stand at site I in the central production area of Cunninghamia lanceolata in Fujian Province,especially the mixed forest of Cunninghamia lanceolata with Mytilaria laosensis,which can be popularized and applied in the middle subtropical areas of Yongan city and its surrounding.