荒漠植物霸王(Zygophyllum xanthoxylum)不同大小叶片C、N、P化学计量特征
收稿日期: 2012-11-27
修回日期: 2013-01-20
网络出版日期: 2013-01-20
Stoichiometric Traits of C, N, P of Leaves in Desert Shrub Zygophyllum xanthoxylum
Received date: 2012-11-27
Revised date: 2013-01-20
Online published: 2013-01-20
对荒漠植物霸王(Zygophyllum xanthoxylum)不同大小叶片的碳（C）、氮（N）、磷（P）化学计量比特征进行了研究。结果表明：随着单叶重量（ILM）、单叶面积（ILA）和比叶面积重量（LMA）的增加,叶片C、N、P含量迅速降低后趋于稳定,叶片C∶N和C∶P值均逐渐增大,而叶片N∶P值则先升高后逐渐趋于稳定。本研究采集叶片单叶重量变异系数为55.44%,而叶片C、N、P含量及C∶N、C∶P和N:P值变异系数均小于25%,其大小排序为：P（22.6%）>N（15.21%）>N∶P（14.67%）>C∶P（13.30%）>C（12.18%）>C∶N（8.81%）。
牛得草1 , 陈鸿洋1 , 江世高1 , 常佩静2 , 傅 华1 . 荒漠植物霸王(Zygophyllum xanthoxylum)不同大小叶片C、N、P化学计量特征[J]. 中国沙漠, 2013 , 33(3) : 703 -709 . DOI: 10.7522/j.issn.1000-694X.2013.00101
Stoichiometric traits of C, N, P for desert shrub Zygophyllum xanthoxylum leaves with changes in leaf size were observed. The results showed that with the values of individual leaf mass (ILM), individual leaf area (ILA) and leaf mass per area (LMA) increasing, leaf C, N and P contents decreased rapidly and then tended to be stable, while both leaf C∶N and C∶P increased gradually, N∶P increased firstly and then tended to be stable. In our study, the coefficient of variation(CV) for individual leaf mass was 55.44%, while the CV for leaf C, N and P content, C∶N, C∶P and N∶P were less than 25%, and the order was: P(22.6%)>N(15.21%)>N∶P(14.67%)>C∶P(13.30%)>C(12.18%)>C∶N(8.81%).
Key words： Zygophyllum xanthoxylum; leaf size; ecological stoichiometry
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