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作 者 ：李轩然, 刘琪璟, 蔡哲, 马泽清

期 刊 ：植物生态学报 2007年 31卷 1期 页码：93-101

关键词：湿地松；马尾松；杉木；比叶面积；叶面积指数；生物量；

Keywords:Pinus elliotii, P. massoniana, Cunninghamia lanceolata, specific leaf area (SLA), leaf area index (LAI), biomass,

摘 要 ：

根据实测数据计算了湿地松（Pinus elliotii）、马尾松(P. massoniana) 和杉木 (Cunninghamia lanceolata)不同年龄、不同类型叶片的生物量和比叶面积，并结合样地调查数据和相对生长方程计算了中国科学院千烟洲试验站20年生湿地松林、马尾松林、杉木林和针叶混交林的叶面积指数。根据拟合结果，选择如下方程计算3个树种的叶生物量：湿地松W=12.0741D^2.1515、马尾松W=6.9727D^2.1973和杉木W=5.2619D^2.3027。湿地松林的叶生物量（0.822 kg•m^-2）最大，其次为针叶混交林（0.679 kg•m^-2），马尾松林和杉木林相差不大（分别为林0.5 28和0.572 kg•m^-2）。不同树种、不同年龄、不同类型叶片的比叶面积比较发现，新叶的比叶面积大于老叶，三针一束叶的比叶面积略大于两针一束叶，马尾松的平均半比表面积（8.62 m²•kg^-1）大于湿地松（6.04 m²•kg^-1） 和杉木（7.91 m²•kg^-1）。胸径与单木叶片半表面积之间的经验方程为：湿地松 LA=0.073D^2.1515、马尾松LA=0.060D^2.1973和杉木LA=0.042D^2.3027。据此计算湿地松林的叶面积指数为5.03，马尾松林和杉木林为4.31，针叶混交林为4.77，该结果比利用CI_110植被冠层数字图像仪测得的结果偏大。

Abstract:

Aims Our objective was to determine foliage biomass and leaf area index (LAI) of four types of conifer plantations in Qianyanzhou Experimental Station in subtropical China.
Methods We developed allometric equations between foliage biomass and stem diameter at breast height (DBH) and obtained specific leaf area (SLA) from data on leaf length, width and weight for different ages and types of leaves from three dominant species: slash pine (Pinus elliotii), masson pine (P. massoniana ) and Chinese fir (Cunninghamia lanceolata).
Important findings Allometric equations for foliage biomass of slash pine, mass on pine and Chinese fir were W=12.0741D^2.1515, W=6.9727D ^2.1973 andW=5.2619D^2.3027, respectively. Foliage biomass of s lash pine plantation (0.822 kg•m^-2) was the highest among all stands, followed by mixed coniferous plantation (kg•m^-2), Chinese fir plantation (0.572 kg•m^-2) and masson pine plantation (0.528 kg•m^-2). For each species, SLA of new leaves was larger than old ones, and that of three needle leaves was larger than two needle ones. Mean specific hemisurface area of masson pine (8.62 m²•kg^-1) and slash pine (6.04 m²•kg^-1). Regression equations between stem DBH (D) and mean hemisurface area (LA) for slash pine, masson pine and Chinese fir were LA=0.073D^2.1515, LA=0.060D^2.1973and LA=0.042D^2.3027, respectively. LAI was 5.03 for slash pine plantation, 4.31 for both masson pine plantation and Chinese fir plantation, and 4.77 for mixed coniferous plantation, all larger than that measured with CI－110 plant canopy digital imager.

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