摘要
以3种不同造林模式造林2年后的闽楠试验林为研究对象,分析其幼林生长情况、根系性状、木材特性、光合作用,比较不同造林模式下闽楠的差异。结果表明:3种造林模式中杉木林下套种闽楠的平均地径、树高、最大冠幅、枝下高、根深、平均根幅、单株总根长、根系总表面积和根系总体积均最大,分别达11.60mm、115.56cm、61.33cm、32.42cm、47.50cm、48.42cm、1269.13cm、376.75cm2、9.32cm^3。杉木林下套种闽楠模式的树干纤维素含量最高,达34.32%。3种不同造林模式最大净光合速率(Pmax)的范围在5.52~7.92μmol/m^2·s,表观量子效率(AQY)范围在0.0417~0.0602μmol/μmol,Pmax和AQY大小排序均为:林下套种>混交林>纯林。不同造林模式光饱和点(Ls)的范围在943.62~1508.13μmol/m^2·s,光补偿点(Lc)的范围在11.79~16.53μmol/m^2·s,Ls和Lc由高到低依次为纯林>混交林>林下套种。林下套种闽楠的综合评分最高,达0.7814,混交林次之,得分为0.2782;综合生长情况、根系性状、木材特性、光合作用等性状表现,本研究3种造林模式中保留密度450株/hm2的杉木林下套种闽楠为造林成效最优的模式。
Phoebe bournei (Hemsl.)Yang after two years of afforestation in three different afforestation models were used as tested materials, the growth condition of young plantation, root traits, wood characteristics and photosynthesis were analyzed, and the difference of Phoebe bournei (Hemsl.)Yang among three different afforestation models were compared. The results showed that the ground diameter, tree height, the maximum crown width, the clear bole height, root depth, average root width, individual root length, total root surface area and root volume of P. bournei were the largest interplanting with Chinese Fir among the three afforestation models, and the values were 11.60 mm, 115.56 cm, 61.33 cm, 32.42 cm, 47.50 cm, 48.42 cm, 1269.13 cm, 376.75 cm^2 and 9.32 cm^3,respectively. The cellulose content of P. bournei of the interplanted forest was the highest, reaching 34.32 %. The maximum net photosynthetic rate ( P max )of the three different afforestation models ranged from 5.52 to 7.92 μmol/m ^2·s, and the AQY ranged from 0.0417 to 0.0602 μmol/μmol, and the order of both ( P max ) and AQY were as follows: the interplanted forest > mixed forest > pure forest. The L s ranged from 943.62 to 1508.13 μmol/m^ 2·s, the ranged from 11.79 to 16.53 μmol/m^ 2·s , and the order of both L s and L c were as follows: pure forest>mixed forest>the interplanted forest. The comprehensive score of the interplanted forest was the highest, reaching 0.7814, followed by mixed forests, with a score of 0.2782. According to the character performance of the growth of young plantation, root traits, wood characteristics and photosynthesis, it is indicated that interplanted forest with 450 trees/hm 2 Chinese Fir retention density is the optimum model for afforestation of P. bournei among the three afforestation models.
作者
黄宇
林智勇
汤行昊
廖鹏辉
张娟
范辉华
HUANG Yu;LIN Zhi-yong;TANG Xing-hao;LIAO Peng-hui;ZHANG Juan;FAN Hui-hua(Fujian Academy of Forestry, Fuzhou, Fujian 350012,China;China Popularization Station of Forestry Science &Technology of Fujian Province, Fuzhou, Fujian 350003,China)
出处
《山地农业生物学报》
2019年第5期6-12,29,共8页
Journal of Mountain Agriculture and Biology
基金
国家重点研发计划重点专项课题“楠木、樟树等珍贵树种定向培育技术集成与示范”(2017YFD0601102)子课题“闽楠等珍贵树种定向培育技术集成与示范”
十三五国家重点研发计划子课题“福建闽楠高效培育技术”
福建省林业科学研究项目(不同造林模式闽楠造林成效研究,闽林科[2016]3号)
福建省科技厅省属公益类科研院所基本科研专项(闽楠不同规格容器苗造林效果研究,2016R1010-2)
国家林业局南方山地用材林培育重点实验室资助
关键词
闽楠
造林模式
生长性状
根系性状
木材特性
P. bournei (Hemsl.)Yang
afforestation models
growth traits
root traits
wood characteristics
