Spatial patterns of leaf nutrient traits of the plants in the Loess Plateau of China
- 632 Downloads
The spatial patterns of leaf nutrient traits of plants in seven sites, Yangling, Yongshou, Tongchuan, Fuxian, Ansai, Mizhi and Shenmu, standing from south to north in the Loess Plateau of China, were studied. The results showed that of the 126 plant samples in the Loess Plateau, the mean leaf organic carbon (C), nitrogen (N), phosphorus (P) and potassium (K) were 43.8, 2.41, 0.16 and 1.67%, respectively, and ranked in the order of C > N > K > P. Leaf C, N, P and K ranged from 32.6 to 54.8%, 0.82 to 4.58%, 0.06 to 0.35%, and 0.24 to 4.21%, respectively. The mean leaf C/N, C/P and N/P ratios were 21.2, 312 and 15.4, respectively. It is indicated that leaf N in the Loess Plateau was significantly higher than those in Chinese and global flora, but leaf P was significantly lower than that in global flora, which resulted in a higher N/P ratio in the Loess Plateau. The results also showed that leaf C, N, P, K, C/N and C/P ratios varied significantly among the seven life-form groups, which were trees, shrubs, herbages, evergreen trees, deciduous trees, C3 and C4 herbages, but leaf N/P ratio differed little among the seven life-forms. In the sampled species in the Loess Plateau, leaf C was negatively correlated with leaf N, P and K, while leaf N, P and K were positively correlated with one another. In general, leaf N/P ratio increased as the latitude and annual solar radiation increased and the mean annual rainfall and mean annual temperature decreased.
KeywordsLeaf nutrient Life form Spatial pattern Climatic factor Loess Plateau
This research was supported by the West-action Program in Chinese Academy of Sciences (Grant No. KZCX2-XB2-05), National Natural Science Foundation of China (Grant No. 30230290), the United Scholar’s Item of Talent Training Program in West China of Chinese Academy of Sciences (Grant No. 2005LH01), and the Program for Outstanding Talents and Team in Northwest A & F University.
- Fang JY, Song YC, Liu HY, Piao SL (2002) Vegetation–climate relationship and its application in the division of vegetation zone in China. Acta Bot Sin 44:1105–1122Google Scholar
- Hedin LO, Vitousek PM, Matson PA (2003) Nutrient losses over four million years of tropical forest development. Ecology 84:2231–2255Google Scholar
- Marschner H (1995) Mineral nutrition of higher plants. Academic, LondonGoogle Scholar
- Mcgroddy ME, Daufresne T, Hedin LO (2004) Scaling of C: N: P stoichiometry in forests worldwide: implications of terrestrial red field-type ratios. Ecology 85(9):2390–2401Google Scholar
- National Soil Survey Office of China (1998) Soils of China. Chinese Agriculture Press, Beijing, pp 483–486Google Scholar
- Page A L, Miller RH, Keeney DR (1982) Methods of soil analysis. Part 2. Chemical and microbiological properties (2nd). American Society of Agronomy Press, MadisonGoogle Scholar
- Schlesinger WH (1997) Biogeochemistry: an analysis of Global change, Academic, San DiegoGoogle Scholar
- Sterner RW, Elser JJ (2002) Ecological stoichiometry: the biology of elements from molecules to the biosphere. Princeton University Press, PrincetonGoogle Scholar
- Walker B, Steffen WL, Canadell J, Ingram J (1999) The terrestrial biosphere and Global change—implication for natural and managed ecosystems. Cambridge University Press, UKGoogle Scholar
- Wright IJ, Reich PB, Westoby M, Ackerly DD, Baruch Z, Bongers F, Cavender-Bares J, Chapin T, Cornelissen JHC, Diemer M, Flexas J, Garnier E, Groom PK, Gulias J, Hikosaka K, Lamont BB, Lee T, Lee W, Lusk C, Midgley JJ, Navas M, Niinemets B, Oleksyn J, Osada N, Poorter H, Poot P, Prior L, Pyankov VI, Roumet C, Thomas SC, Tjoelker MG, Veneklaas EJ, Villar R (2004) The worldwide leaf economics spectrum. Nature 428:821–827PubMedCrossRefGoogle Scholar