Chin J Plant Ecol ›› 2010, Vol. 34 ›› Issue (1): 17-22.DOI: 10.3773/j.issn.1005-264x.2010.01.004
Special Issue: 生态化学计量; 青藏高原植物生态学:群落生态学
• Special feature: Ecological Stoichiometry • Previous Articles Next Articles
YANG Kuo1,2, HUANG Jian-Hui1,*(), DONG Dan1,2, MA Wen-Hong3,4, HE Jin-Sheng4
Received:
2009-11-17
Accepted:
2009-12-11
Online:
2010-11-17
Published:
2010-01-01
Contact:
HUANG Jian-Hui
YANG Kuo, HUANG Jian-Hui, DONG Dan, MA Wen-Hong, HE Jin-Sheng. Canopy leaf N and P stoichiometry in grassland communities of Qinghai-Tibetan Plateau, China[J]. Chin J Plant Ecol, 2010, 34(1): 17-22.
年 Year | n | N (mg·g-1) | P (mg·g-1) | N:P | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
AM/GM | SD | CV | AM/GM | SD | CV | AM/GM | SD | CV | ||||
2006 | 47 | 21.5/21.2 | 3.08 | 0.14 | 1.5/1.5 | 0.50 | 0.33 | 15.2/14.6 | 4.11 | 0.27 | ||
2007 | 43 | 26.2/25.7 | 4.85 | 0.18 | 1.5/1.7 | 0.37 | 0.21 | 15.4/15.2 | 2.46 | 0.16 | ||
2008 | 43 | 23.2/22.9 | 3.24 | 0.14 | 2.1/2.1 | 0.33 | 0.16 | 11.0/10.9 | 1.58 | 0.14 | ||
总计 Total | 133 | 23.5/23.2 | 3.24 | 0.18 | 1.9/1.7 | 0.48 | 0.28 | 13.9/13.5 | 3.55 | 0.26 |
Table 1 Statistical characteristics of leaf N, P concentrations and N:P ratios at the community level in the grassland of Qinghai-Tibetan Plateau (2006-2008)
年 Year | n | N (mg·g-1) | P (mg·g-1) | N:P | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
AM/GM | SD | CV | AM/GM | SD | CV | AM/GM | SD | CV | ||||
2006 | 47 | 21.5/21.2 | 3.08 | 0.14 | 1.5/1.5 | 0.50 | 0.33 | 15.2/14.6 | 4.11 | 0.27 | ||
2007 | 43 | 26.2/25.7 | 4.85 | 0.18 | 1.5/1.7 | 0.37 | 0.21 | 15.4/15.2 | 2.46 | 0.16 | ||
2008 | 43 | 23.2/22.9 | 3.24 | 0.14 | 2.1/2.1 | 0.33 | 0.16 | 11.0/10.9 | 1.58 | 0.14 | ||
总计 Total | 133 | 23.5/23.2 | 3.24 | 0.18 | 1.9/1.7 | 0.48 | 0.28 | 13.9/13.5 | 3.55 | 0.26 |
P | N:P | MAT | AP | GST | GSP | |
---|---|---|---|---|---|---|
N | 0.446** | 0.210* | -0.265** | 0.205* | -0.249** | 0.243** |
P | -0.782** | -0.420** | 0.374** | -0.449** | 0.300** | |
N:P | 0.274** | -0.266** | 0.317** | -0.159 |
Table 2 Correlations between leaf N, P concentrations, N:P ratios and climate factors (Pearson test)
P | N:P | MAT | AP | GST | GSP | |
---|---|---|---|---|---|---|
N | 0.446** | 0.210* | -0.265** | 0.205* | -0.249** | 0.243** |
P | -0.782** | -0.420** | 0.374** | -0.449** | 0.300** | |
N:P | 0.274** | -0.266** | 0.317** | -0.159 |
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