千烟洲针叶林的比叶面积及叶面积指数

doi:10.17521/cjpe.2007.0012

摘要/Abstract

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=12.074 1D^{2.151 5}、马尾松W=6.972 7D^{2.197 3}和杉木W=5.261 9D^{2.302 7}。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0.528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^{2.151 5}、马尾松LA=0.060D^{2.197 3}和杉木LA=0.042D^{2.302 7}。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。

关键词: 湿地松, 马尾松, 杉木, 比叶面积, 叶面积指数, 生物量

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, masson pine and Chinese fir were W=12.074 1D^{2.151 5}, W=6.972 7D^{2.197 3} and W=5.261 9D^{2.302 7}, respectively. Foliage biomass of slash pine plantation (0.822 kg·m^-2) was the highest among all stands, followed by mixed coniferous plantation (0.679 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) was the largest, followed by Chinese fir (7.91 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=0.073 D^{2.151 5}, LA=0.060D^{2.197 3} and LA=0.042D^{2.302 7}, 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.

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

李轩然, 刘琪璟, 蔡哲, 马泽清. 千烟洲针叶林的比叶面积及叶面积指数. 植物生态学报, 2007, 31(1): 93-101. DOI: 10.17521/cjpe.2007.0012

LI Xuan-Ran, LIU Qi-Jing, CAI Zhe, MA Ze-Qing. SPECIFIC LEAF AREA AND LEAF AREA INDEX OF CONIFER PLANTATIONS IN QIANYANZHOU STATION OF SUBTROPICAL CHINA. Chinese Journal of Plant Ecology, 2007, 31(1): 93-101. DOI: 10.17521/cjpe.2007.0012

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https://www.plant-ecology.com/CN/Y2007/V31/I1/93

图/表 6

参考文献 42

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群落类型 Forest type	样地编号 Plot No.	样地面积 Area (m²)	密度(株·hm^-2) Density (plant·hm^-2)	叶生物量 Foliage biomass (kg·m^-2)
群落类型 Forest type	样地编号 Plot No.	样地面积 Area (m²)	密度(株·hm^-2) Density (plant·hm^-2)	湿地松 Slash pine	马尾松 Masson pine	杉木 Chinese fir
湿地松林SPP	802A	400	1 675	0.842	0	0
	802B	400	1 450	0.756	0.046	0
马尾松林MPP	731A	400	2 100	0.118	0.409	0
	801A	400	2 175	0.063	0.466	0
杉木林CFP	803A	400	3 475	0.218	0	0.313
	804A	100	4 600	0.010	0	0.603
针叶混交林CMP	807B	100	1 900	0.660	0.128	0
	810B	100	3 000	0	0.531	0.049
	811A	100	2 100	0	0.353	0
	811B	100	2 200	0.993	0	0

群落类型 Forest type	样地编号 Plot No.	样地面积 Area (m²)	密度(株·hm^-2) Density (plant·hm^-2)	叶生物量 Foliage biomass (kg·m^-2)
群落类型 Forest type	样地编号 Plot No.	样地面积 Area (m²)	密度(株·hm^-2) Density (plant·hm^-2)	湿地松 Slash pine	马尾松 Masson pine	杉木 Chinese fir
湿地松林SPP	802A	400	1 675	0.842	0	0
	802B	400	1 450	0.756	0.046	0
马尾松林MPP	731A	400	2 100	0.118	0.409	0
	801A	400	2 175	0.063	0.466	0
杉木林CFP	803A	400	3 475	0.218	0	0.313
	804A	100	4 600	0.010	0	0.603
针叶混交林CMP	807B	100	1 900	0.660	0.128	0
	810B	100	3 000	0	0.531	0.049
	811A	100	2 100	0	0.353	0
	811B	100	2 200	0.993	0	0

群落类型 Forest type	湿地松 Slash pine		马尾松Masson pine		杉木Chinese fir
群落类型 Forest type	老叶 Old leaf (kg·m^-2)	新叶 New leaf (kg·m^-2)	老叶 Old leaf (kg·m^-2)	新叶 New leaf (kg·m^-2)	总叶 Leaf (kg·m^-2)
湿地松林SPP	0.372	0.427	0.010	0.013	0
马尾松林MPP	0.042	0.048	0.192	0.245	0
杉木林CFP	0.053	0.061	0	0	0.458
针叶混交林CMP	0.192	0.221	0.111	0.142	0.012

群落类型 Forest type	湿地松 Slash pine		马尾松Masson pine		杉木Chinese fir
群落类型 Forest type	老叶 Old leaf (kg·m^-2)	新叶 New leaf (kg·m^-2)	老叶 Old leaf (kg·m^-2)	新叶 New leaf (kg·m^-2)	总叶 Leaf (kg·m^-2)
湿地松林SPP	0.372	0.427	0.010	0.013	0
马尾松林MPP	0.042	0.048	0.192	0.245	0
杉木林CFP	0.053	0.061	0	0	0.458
针叶混交林CMP	0.192	0.221	0.111	0.142	0.012

树种 Species	叶形 Shape	叶龄 Age	半比表面积 SHA (m²·kg^-1)	叶长 Length (cm)	直径 Diameter (mm)	干重 Weight (g)	样本量 Sample size
湿地松 Pinus elliotii	两针 Two-needle	老叶Old leaf	5.39	20.7	1.49	0.15	8
		新叶New leaf	6.17	20.0	1.50	0.12	9
	三针 Three-needle	老叶Old leaf	5.73	22.9	1.71	0.21	12
		新叶New leaf	6.67	19.8	1.68	0.15	11
马尾松 P. massoniana	两针 Two-needle	老叶Old leaf	6.40	15.9	0.85	0.06	20
		新叶*New leaf	10.35	12.1	0.90	0.03	9
杉木 Cunninghamia lanceolata	披针叶 Lanceolate	混合叶 Mixed leaf	7.91	—	—	—	10