Scaling relationships and stoichiometry of plant leaf biogenic elements from the arid-hot valley of Jinsha River, China

doi:10.3724/SP.J.1258.2012.01136

Abstract

Abstract:

Aims Plant leaf stoichiometry plays critical roles in the photosynthesis rate, growth rate, dynamics of food chains and biogeochemical cycles. Although previous research showed that nitrogen has a scaling relationship with phosphorus, the relationship between elements besides nitrogen and phosphorus rarely have been studied. This project was to explore the scaling relationships between leaf elements (i.e., Fe, Ca, P, N, S, K) at an arid-hot valley.
Methods Leaf samples were collected from 51 plots located 1000-1400 m above sea level in the arid-hot valley of Jinsha River. Biomass in plots was sorted by species and measured. Leaf elemental contents of 107 samples were qualified. Relationships among these biogenetic elements were analyzed by standard major axis at both plot and individual levels.
Important findings There were always positive scaling relationships between studied elements when they were significantly correlated. The power law exponents derived from log-log scaling relations were near 2/3 for nitrogen relative to phosphorus at the plot level. The power law exponents for iron to N, P, K were >2 at the individual level. The rank of increasing rate in scaling relationships was Fe > Ca > P > N > S > K at the individual level. However, it was Fe > Ca > P > S > K > N at the plot level. We found that iron might be an important element in plant growth in the arid-hot valley for the higher increasing rate of investment in iron versus other elements. The differences in scaling relationships among elemental concentrations between the individual and plot levels suggest that community assembly process has an important role in determining plant stoichiometry at different levels of organization.

Key words: allometric relationship, arid-hot valley, biogenic element, plant nutrient, stoichiometry

YAN Bang-Guo, HE Guang-Xiong, LI Ji-Chao, JI Zhong-Hua. Scaling relationships and stoichiometry of plant leaf biogenic elements from the arid-hot valley of Jinsha River, China[J]. Chin J Plant Ecol, 2012, 36(11): 1136-1144.

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URL: https://www.plant-ecology.com/EN/10.3724/SP.J.1258.2012.01136

https://www.plant-ecology.com/EN/Y2012/V36/I11/1136

Figures/Tables 5

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斜率 Slope	P	N	K	S	Fe	Ca
P		0.641 (0.518-0.792)\|0.45	0.819 (0.625-1.072)\|0.10	0.880 (0.666-1.162)\|0.03	1.673 (1.337-2.093)\|0.38	1.600 (1.217-2.102)\|0.06
N	0.912 (0.784-1.061)\|0.38		1.278 (0.969-1.685)\|0.05	1.373 ( 1.064-1.772)\|0.19	2.611 (2.076-3.283)\|0.35	2.497 (1.961-3.180)\|0.28
K	0.861 (0.721-1.029)\|0.14	0.944 (0.787-1.133)\|0.32		-1.074 (-1.418- -0.814)\|0.04	2.043 (1.586-2.632)\|0.21	1.954 (1.476-2.588)\|0.02
S	0.964 (0.721-1.037)\|0.32	0.948 (0.793-1.133)\|0.14	1.004 (0.829-1.216)\|0.01		-1.902 (-2.521- -1.435)\|0.01	1.819 (1.371-2.414)\|0.00
Fe	2.169 (1.830-2.572)\|0.22	2.379 (2.015-2.809)\|0.26	2.519 (2.087-3.042)\|0.04	2.509 (2.073-3.037)\|0.02		0.956 (0.740-1.236)\|0.18
Ca	1.902 (1.587-2.280)\|0.11	2.086 (1.777-2.449)\|0.31	2.209 (1.830-2.667)\|0.04	2.200 (1.816-2.666)\|0.00	0.877 (0.737-1.043)\|0.19

斜率 Slope	P	N	K	S	Fe	Ca
P		0.641 (0.518-0.792)\|0.45	0.819 (0.625-1.072)\|0.10	0.880 (0.666-1.162)\|0.03	1.673 (1.337-2.093)\|0.38	1.600 (1.217-2.102)\|0.06
N	0.912 (0.784-1.061)\|0.38		1.278 (0.969-1.685)\|0.05	1.373 ( 1.064-1.772)\|0.19	2.611 (2.076-3.283)\|0.35	2.497 (1.961-3.180)\|0.28
K	0.861 (0.721-1.029)\|0.14	0.944 (0.787-1.133)\|0.32		-1.074 (-1.418- -0.814)\|0.04	2.043 (1.586-2.632)\|0.21	1.954 (1.476-2.588)\|0.02
S	0.964 (0.721-1.037)\|0.32	0.948 (0.793-1.133)\|0.14	1.004 (0.829-1.216)\|0.01		-1.902 (-2.521- -1.435)\|0.01	1.819 (1.371-2.414)\|0.00
Fe	2.169 (1.830-2.572)\|0.22	2.379 (2.015-2.809)\|0.26	2.519 (2.087-3.042)\|0.04	2.509 (2.073-3.037)\|0.02		0.956 (0.740-1.236)\|0.18
Ca	1.902 (1.587-2.280)\|0.11	2.086 (1.777-2.449)\|0.31	2.209 (1.830-2.667)\|0.04	2.200 (1.816-2.666)\|0.00	0.877 (0.737-1.043)\|0.19

物种 Species	S (mg·g^-1)	P (mg·kg^-1)	K (mg·g^-1)	Ca (mg·g^-1)	Fe (mg·kg^-1)	N (mg·g^-1)
橘草 Cymbopogon goeringii	1.57	632.00	9.59	8.07	192.84	10.79
孔颖草 Bothriochloa pertusa	1.30	945.15	11.90	6.73	327.69	11.02
黄茅 Heteropogon contortus	1.24	539.80	5.58	4.33	149.13	8.58
独穗飘拂草 Fimbristylis monostachya	1.34	740.22	12.42	3.52	276.38	8.52
双花草 Dichanthium annulatum	0.98	663.67	8.51	5.57	194.52	8.42
假杜鹃 Barleria cristata	0.97	896.00	15.00	47.33	506.17	16.54
拟金茅 Eulaliopsis binata	0.66	490.60	10.06	4.66	199.41	7.80
白灰毛豆 Tephrosia candida	1.41	857.20	11.95	15.77	225.40	27.53
刺芒野古草 Arundinella setosa	2.78	471.75	8.14	5.45	115.80	7.70
蔓草虫豆 Cajanus scarabaeoides var. scarabaeoides	1.29	1040.00	13.04	9.22	535.25	20.28
茅叶荩草 Arthraxon prionodes	1.36	845.75	7.46	16.20	259.00	10.65
裂稃草 Schizachyrium brevifolium	0.96	473.50	5.64	4.57	212.50	7.30
扁穗莎草 Cyperus compressus	1.69	773.00	6.44	4.54	106.00	10.15
叶下珠 Phyllanthus urinaria	2.01	1437.00	10.15	9.93	599.67	14.50
垫状卷柏 Selaginella pulvinata	1.34	791.00	4.49	1.71	832.00	14.30
三芒草 Aristida adscensionis	1.12	1750.00	7.89	3.85	757.00	11.50
西南飘拂草 Fimbristylis thomsonii	3.44	924.00	21.00	6.95	93.20	8.10
大叶千斤拔 Flemingia macrophylla	1.14	1310.00	9.50	9.28	1241.00	17.30
单叶木蓝 Indigofera linifolia	1.01	1043.50	6.03	84.60	521.50	15.30
白背黄花稔 Sida rhombifolia	1.30	1648.00	14.90	10.60	498.00	17.70
丁癸草 Zornia gibbosa	1.71	832.10	13.80	10.80	608.00	24.30
棕茅窗体顶端 Eulalia phaeothrix 窗体底端	1.33	501.00	7.87	6.25	152.67	7.80
四脉金茅 Eulalia quadrinervis	0.87	438.50	12.25	4.04	127.10	7.20

物种 Species	S (mg·g^-1)	P (mg·kg^-1)	K (mg·g^-1)	Ca (mg·g^-1)	Fe (mg·kg^-1)	N (mg·g^-1)
橘草 Cymbopogon goeringii	1.57	632.00	9.59	8.07	192.84	10.79
孔颖草 Bothriochloa pertusa	1.30	945.15	11.90	6.73	327.69	11.02
黄茅 Heteropogon contortus	1.24	539.80	5.58	4.33	149.13	8.58
独穗飘拂草 Fimbristylis monostachya	1.34	740.22	12.42	3.52	276.38	8.52
双花草 Dichanthium annulatum	0.98	663.67	8.51	5.57	194.52	8.42
假杜鹃 Barleria cristata	0.97	896.00	15.00	47.33	506.17	16.54
拟金茅 Eulaliopsis binata	0.66	490.60	10.06	4.66	199.41	7.80
白灰毛豆 Tephrosia candida	1.41	857.20	11.95	15.77	225.40	27.53
刺芒野古草 Arundinella setosa	2.78	471.75	8.14	5.45	115.80	7.70
蔓草虫豆 Cajanus scarabaeoides var. scarabaeoides	1.29	1040.00	13.04	9.22	535.25	20.28
茅叶荩草 Arthraxon prionodes	1.36	845.75	7.46	16.20	259.00	10.65
裂稃草 Schizachyrium brevifolium	0.96	473.50	5.64	4.57	212.50	7.30
扁穗莎草 Cyperus compressus	1.69	773.00	6.44	4.54	106.00	10.15
叶下珠 Phyllanthus urinaria	2.01	1437.00	10.15	9.93	599.67	14.50
垫状卷柏 Selaginella pulvinata	1.34	791.00	4.49	1.71	832.00	14.30
三芒草 Aristida adscensionis	1.12	1750.00	7.89	3.85	757.00	11.50
西南飘拂草 Fimbristylis thomsonii	3.44	924.00	21.00	6.95	93.20	8.10
大叶千斤拔 Flemingia macrophylla	1.14	1310.00	9.50	9.28	1241.00	17.30
单叶木蓝 Indigofera linifolia	1.01	1043.50	6.03	84.60	521.50	15.30
白背黄花稔 Sida rhombifolia	1.30	1648.00	14.90	10.60	498.00	17.70
丁癸草 Zornia gibbosa	1.71	832.10	13.80	10.80	608.00	24.30
棕茅窗体顶端 Eulalia phaeothrix 窗体底端	1.33	501.00	7.87	6.25	152.67	7.80
四脉金茅 Eulalia quadrinervis	0.87	438.50	12.25	4.04	127.10	7.20

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