SPECIFIC LEAF AREA AND LEAF AREA INDEX OF CONIFER PLANTATIONS IN QIANYANZHOU STATION OF SUBTROPICAL CHINA

doi:10.17521/cjpe.2007.0012

Abstract

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

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[J]. Chin J Plant Ecol, 2007, 31(1): 93-101.

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

Figures/Tables 6

References 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