| 沙坡头没蒿和柠条叶片δ13C 和 N 含量的季节变化特征 |
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| 关键词:Shapotou carbon isotope discrimination N concentration Caragana korshinskii Artemisia ordosia |
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| Seasonal Variation Characteristics of Leaf Carbon Isotope Discrimination (△) and N Concentration of C. korshinskii and A. ordosica |
| By analyzing leaf stable carbon isotope discrimination (△) and N concentration of Caragana korshinskii (C.K) and Artemisia ordosica (A.O)under different planting arrangements in Shapotou, the authors investigated the variations of plant leaf stable carbon isotope discrimination (△) and N concentration. The results show that the of C.K is higher significantly than that of A.O；with single planting is higher than that of mixed planting, and the C.K shows the opposite trend, namely, the △ of C.K with single planting is lower than that of mixed planting. Compared with that of C.K, N concentration of A.O is significantly low. There is no difference of Nconcentration between single and mixed planting in C.K. However, this difference is very significant in A.O and the N conentration with nixed planting is significantly higher than of single planting (=0.001). There exist significantly poitive relationships between △ and N concentration under the conditions of both planting regimes, single planting and mixed planting, suggesting that the leaf N concentration of C.K may be a proxy of △. However, these relationships are not constant in A.O. |
| ZHAO Lingju,XIAO Hongliang,LIU Xiaohong,CHEN Kelong.2005.Seasonal Variation Characteristics of Leaf Carbon Isotope Discrimination (△) and N Concentration of C. korshinskii and A. ordosica[J].Acta Geoscientica Sinica,26(z1):213-219. |
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