杉木林不同密度套种鄂西红豆树初期生长效果分析  

Analysis on the Growth Effect in the Initial Stage of Intercropping of Ormosia Hosiei Hemsl.et Wils in Western Hubei With Different Densities in Cunninghamia lanceolata Forests

作　　者：张昌财 Zhang Changcai(Forestry Bureau of Shaxian District,Sanming City,Shaxian 365050,Fujian,China)

机构地区：[1]三明市沙县区林业局,福建沙县365050

出　　处：《绿色科技》2024年第15期98-102,共5页Journal of Green Science and Technology

基　　金：中央财政2018年森林质量精准提升示范项目(编号:闽林文[2017]57号,闽发改[2018]138号)。

摘　　要：选择22年生人工杉木林间伐调整林分密度后套种鄂西红豆树,设计3种不同密度套种方式:A处理为杉木900株/hm^(2)套种鄂西红豆树600株/hm^(2)、B处理为杉木750株/hm^(2)套种鄂西红豆树750株/hm^(2)、C处理为杉木600株/hm^(2)套种鄂西红豆树900株/hm^(2),比较人工杉木林不同密度套种鄂西红豆树的生长效果,结果表明:套种6年后,杉木和鄂西红豆树的生长量均随杉木保留密度的降低而增大,对2个树种的保存率没有显著影响,以C处理形成的异龄复层林的生长效果最佳,杉木的平均胸径达22.6 cm,平均树高达16.8 m,平均单株材积达0.3214 m^(3),平均蓄积量达192.197m^(3)/hm^(2);鄂西红豆树的平均胸径达5.5 cm,平均树高达6.5 m,平均单株材积达0.0086 m^(3),平均蓄积量达7.224 m^(3)/hm^(2);杉木、鄂西红豆树的合计蓄积量达199.421 m^(3)/hm^(2)。The 22-year artificial Cunninghamia lanceolata forests were selected to intercrop and adjust the stand density to interplant Ormosia Hosiei Hemsl.et Wils in western Hubei,and three different density Ormosia Hosiei interplanting methods were designed:A-900 Cunninghamia lanceolata trees/hm^(2) intercropped with 600 trees of Ormosia Hosiei Hemsl.et Wils in Western Hubei/hm^(2),B-750 Cunninghamia lanceolata trees/hm^(2) intercropped with 750 trees of Ormosia Hosiei Hemsl.et Wils in Western Hubei/hm^(2),and C-600 Cunninghamia lanceolata trees/hm^(2) intercropped with 900 trees of Ormosia Hosiei Hemsl.et Wils in Western Hubei/hm^(2).The growth effects of the intercropping of Ormosia Hosiei Hemsl.et Wils in Western Hubei with different densities in artificial Cunninghamia lanceolata forests were compared.The results indicated that the growth of Cunninghamia lanceolata and Ormosia Hosiei Hemsl.et Wils in Western Hubei increased with the decrease of conserved density of Cunninghamia lanceolata 6 years after intercropping.It had no significant influence on the preserving rate of the two tree species.The growth effect of the uneven aged mixed tiered forest formed through treatment with C was the best.The average DBH of Cunninghamia lanceolata was 22.6 cm;the average height of the tree was 16.8 m;the average volume of timber of a single tree was 0.3214 m^(3),and the average amount of growing stock was 192.197 m^(3).hm-2;the DBH of Ormosia Hosiei Hemsl.et Wils in Western Hubei was 5.5 cm;the average height of the tree was 6.5 m;the average volume of timber of a single tree was 0.0086 m^(3),and the average amount of growing stock was 7.224 m^(3)/hm^(2);and the total amount of growing stock of Cunninghamia lanceolata and Ormosia Hosiei Hemsl.et Wils was up to 199.421 m^(3)/hm^(2).

关 键 词：杉木林 鄂西红豆树 保留密度 林下套种 生长效果 

分 类 号：S723.1[农业科学—林木遗传育种]