A PRELIMINARY STUDY ON BIOMASS OF WOODWARDIA JAPONICA COMMUNITY UNDER A CONIFEROUS PLANTATION IN SUBTROPICAL CHINA

doi:10.3773/j.issn.1005-264x.2008.01.010

Abstract

Abstract:

Aims The purpose of the study was to determine the biomass (including fine roots), NPP, specific leaf area (SLA), leaf area index (LAI), and soil nutrients of Woodwardia japonica community under artificial coniferous forest in Jiangxi Province in subtropical China.
Methods Plants in quadrats were harvested and dry weight was measured. Leaf area was measured by scanning, and SLA was represented by the ratio of dry matter to leaf area. LAI of the population was estimated by SLA and leaf biomass.
Important findings The relationships between aboveground biomass (W1) and geometric parameters of W. japonica were established (W1=0.021H ^1.545(R²=0.790) and W1=2.518(D ²H)^0.616(R²=0.894), H: height; D: diameter). The biomass of herbage and shrub under coniferous plantation was 367.8 g·m^-2(52-932 g·m^-2), 4.7% of canopy layer. The accumulated litter under forest was 1 631 g·m^-2(672-2 763 g·m^-2). The above- and under-ground biomass of W. japonica community were 266.6 g·m^-2 and 212.6 g·m^-2, respectively. In total, the biomass of W. japonica population approximately accounted for 73.7% of the whole herbaceous layer. There was a significant negative-correlation between SLA and leaves dry matter content (LDMC). A leaf area (S) model was established in the form of S=21.922 6-0.152L ²+0.000 9L³(9.0≤L: max length of leaf ≤23.5;1.4 ≤ W: max width of leaf ≤5.9).LAI of W. japonica population was estimated as 1.8 m²·m^-2. Soil water content affected biomass of the community. A positive correlation between biomass and soil nitrogen concentration or soil organic matter (SOC) was identified.

Key words: Woodwardia japonica, biomass, biomass model, leaf area model, SLA, LAI

MA Ze-Qing, LIU Qi-Jing, XU Wen-Jia, LI Xuan-Ran, LIU Ying-Chun. A PRELIMINARY STUDY ON BIOMASS OF WOODWARDIA JAPONICA COMMUNITY UNDER A CONIFEROUS PLANTATION IN SUBTROPICAL CHINA[J]. Chin J Plant Ecol, 2008, 32(1): 88-94.

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URL: https://www.plant-ecology.com/EN/10.3773/j.issn.1005-264x.2008.01.010

https://www.plant-ecology.com/EN/Y2008/V32/I1/88

Figures/Tables 9

References 21

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林型 Forest type	湿地松林 Pinus elliottii forest					马尾松林 P.massoniana forest
林型 Forest type	1	2	3	4	5	6	7
坡向 Aspect	SUN	SHA	SHA	SUN	SHA	SHA	SHA
坡度 Slope	<15°	<13°	<13°	<3°	<5°	<3°	<15°
郁闭度 Canopy density	0.90	0.85	0.90	0.85	0.92	0.80	0.95

林型 Forest type	湿地松林 Pinus elliottii forest					马尾松林 P.massoniana forest
林型 Forest type	1	2	3	4	5	6	7
坡向 Aspect	SUN	SHA	SHA	SUN	SHA	SHA	SHA
坡度 Slope	<15°	<13°	<13°	<3°	<5°	<3°	<15°
郁闭度 Canopy density	0.90	0.85	0.90	0.85	0.92	0.80	0.95

生物学指标 Biologic items	最小值 Min	最大值 Max	平均值 Mean	标准差 Standard error	观测数 Number
地上生物量 Aboveground biomass (g)	0.6	14.5	5.2	3.33	70
地径Diameter (mm)	1.67	7.38	4.39	1.21	70
高度Height (cm)	16	131	67.7	24.6	70
冠幅Crown width size (cm)	15	49	29.4	7.63	70
叶柄长 Petiole length (cm)	13	59	33	11.53	70

生物学指标 Biologic items	最小值 Min	最大值 Max	平均值 Mean	标准差 Standard error	观测数 Number
地上生物量 Aboveground biomass (g)	0.6	14.5	5.2	3.33	70
地径Diameter (mm)	1.67	7.38	4.39	1.21	70
高度Height (cm)	16	131	67.7	24.6	70
冠幅Crown width size (cm)	15	49	29.4	7.63	70
叶柄长 Petiole length (cm)	13	59	33	11.53	70

	D	H	C	H₁	D²H	B
D	1.00	0.77	0.67	0.68	0.90	0.83
H		1.00	0.77	0.89	0.89	0.86
C			1.00	0.66	0.72	0.82
H₁				1.00	0.81	0.73
D²H					1.00	0.92
B						1.00