摘要
2016年10月对永安国有林场30年生杉木大径材林分按照3种保留密度(A450、B600、C750株·hm^(-2))进行择伐,2017年2月在A、B、C 3种保留密度林下分别套种825、675、525株·hm^(-2)红锥,2021年12月对形成的异龄复层林分进行调查。结果表明:套种后5 a,杉木和红锥生长量均随着择伐强度的增大而增大,不同处理组合间杉木、红锥树高、胸径、材积和蓄积量均存在显著或极显著差异。杉木保留450株·hm^(-2)套种红锥825株·hm^(-2)形成的异龄复层林的生长效果最优,林分总蓄积量达445.08 m^(3)·hm^(-2),其中35年生的杉木平均树高27.20 m、胸径31.77 cm、单株材积0.9398 m^(3),分别比对照提高13.66%、17.15%、51.13%。6年生红锥的平均树高7.08 m、胸径6.26 cm、冠幅3.52 m、材积0.0123 m^(3),达到红锥适宜区生长量标准。试验结果可为培育杉木高价值优质大径材和红锥用材林提供借鉴。
In October 2016,30-year old-growth C.lanceolata large diameter timber stand was selected according to three reserve densities(A450,B600,C750 plants·hm^(-2))in Fujian Yong′an State-owned Forest Farm.In February 2017,825,675,525 plants·hm^(-2)C.hystrix were interplanted accordingly reserve densities A、B、C three options,and in December 2021,age-complex forest scores were investigated.The results showed that the growth of C.lanceolata and C.hystrix increased with the increase of selective cutting intensity 5 years after interplanting,and there were significant or extremely significant differences in height,DBH,volume and volume of C.lanceolata and C.hystrix among different treatment combinations.The growth effect of the uneven-aged multi-layer forest formed by keeping 450 plants·hm^(-2)of C.lanceolata and interplanting 825 plants·hm^(-2)of C.hystrix is the best,with a total stand volume of 445.08 m^(3)·hm^(-2),in which the average tree height,DBH and individual volume of 35-year-old C.lanceolata are 27.20 m,31.77 cm and 0.9398 m^(3)respectively,which are higher than those of the control.The average tree height,DBH,crown width and volume of 6-year-old C.hystrix were 7.08 m,6.26 cm,3.52 m and 0.0123 m^(3),which reached the growth standard of suitable area for C.hystrix.The test results can provide a reference for cultivating high-value and high-quality large-diameter timberof C.lanceolata and C.hystrix timber.
作者
张超
ZHANG Chao(Fujian Yong′an State-owned Forest Farm,Yong′an 366031,Fujian,China)
出处
《福建林业科技》
2023年第3期42-45,共4页
Journal of Fujian Forestry Science and Technology
基金
三明市林业科学研究项目(杉木人工林近自然森林经营技术研究,明林计财〔2019〕2号)。
关键词
杉木
大径材
林下套种
红锥
生长效果
Cunninghamia lanceolata
large-diameter timber
intercropping under forest
[WTBX]Castanopsis hystrix
[WTBZ]growth effect
