莱州湾湿地柽柳叶片N、P生态化学计量学特征

生态学杂志

莱州湾湿地柽柳叶片N、P生态化学计量学特征

荣戗戗^1,2,刘京涛^2**,夏江宝²,陆兆华^1,2,郭彩虹^1,2

(¹中国矿业大学(北京)化学与环境工程学院恢复生态研究所，北京 100083； ²山东省黄河三角洲生态环境重点实验室， 滨州学院，山东滨州 256603)

出版日期:2012-12-10 发布日期:2012-12-10

Leaf N and P stoichiometry of Tamarix chinensis L. in Laizhou Bay wetland, Shandong Province of East China.

RONG Qiang-qiang^1,2, LIU Jing-tao^2**, XIA Jiang-bao², LU Zhao-hua^1,2, GUO Cai-hong^1,2

(¹Institute of Restoration Ecology, College of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, China; ²Shandong Provincial Key Laboratory of Ec-Environmental Science for Yellow River Delta (Binzhou University), Binzhou 256603, Shandong, China)

Online:2012-12-10 Published:2012-12-10

摘要/Abstract

摘要： 以莱州湾湿地柽柳为研究对象，分析柽柳叶片N、P化学计量学特征的季节动态及其与土壤盐含量的相关性。结果表明：莱州湾湿地柽柳叶片中N、P含量及N/P分别为18.39～32.86 g·kg^-1、1.02～3.16 g·kg^-1和8.62～23.66；平均值为25.74 g·kg^-1、1.75 g·kg^-1和15.86。叶片中N、P含量随季节的变化呈现先减小再增加的“倒抛物线”型变化趋势；而N/P呈现出先增加后减小，再逐步趋于稳定的变化趋势。莱州湾湿地柽柳的生长在生长季初期(5月)主要受N限制，而生长季中期和后期(7—10月)主要受P限制。柽柳叶片中N含量与土壤盐含量存在一定正相关(P=0.063)，P含量与土壤盐含量呈负相关(P<0.05)，N/P与土壤盐含量呈正相关(P<0.01)。

Abstract: Taking Tamarix chinensis L. in Laizhou Bay wetland as test object, this paper analyzed the seasonal variations of the leaf nitrogen (N) and phosphorus (P) stoichiometry and their correlations with soil salt concentration. The leaf N and P contents and N/P ratio of T. chinensis ranged 18.39-32.86 g·kg^-1, 1.02-3.16 g·kg^-1, and 8.62-23.66, with a mean value of 25.74 g·kg^-1, 1.75 g·kg^-1, and 15.86, respectively. The seasonal variations of the leaf N and P contents presented a trend of decreasing first and increasing then, with a shape of “inverted parabola”, while an opposite trend was observed for the leaf N/P ratio. The growth of T. chinesis was limited by N at the beginning of the growth season (May), but by P in the middle and late stages of the growth season (July-October). There was a definite positive correlation between the leaf N content and soil salt concentration (P=0.063), a significant negative correlation between the leaf P content and soil salt concentration (P<0.05), and a very significant positive correlation between the leaf N/P ratio and soil salt concentration (P<0.01).

荣戗戗1,2,刘京涛2**,夏江宝2,陆兆华1,2,郭彩虹1,2. 莱州湾湿地柽柳叶片N、P生态化学计量学特征[J]. 生态学杂志.

RONG Qiang-qiang1,2, LIU Jing-tao2**, XIA Jiang-bao2, LU Zhao-hua1,2, GUO Cai-hong1,2 . Leaf N and P stoichiometry of Tamarix chinensis L. in Laizhou Bay wetland, Shandong Province of East China.[J]. cje.