欢迎访问《植物研究》杂志官方网站,今天是 分享到:

植物研究 ›› 2020, Vol. 40 ›› Issue (2): 224-232.doi: 10.7525/j.issn.1673-5102.2020.02.009

• 研究报告 • 上一篇    下一篇

海南岛海岸带木麻黄和厚藤叶片碳、氮、磷含量及其化学计量特征

张书齐1,4, 许全1, 姚海荣2, 杨秋1,4, 刘文杰1, 王萌3   

  1. 1. 海南大学生态与环境学院, 海口 570228;
    2. 三亚市林业科学研究院, 三亚 572000;
    3. 海南大学植物保护学院, 海口 570228;
    4. 海南省林业科学研究院(海南省红树林研究院), 海口 571100
  • 收稿日期:2019-09-29 出版日期:2020-03-05 发布日期:2020-03-06
  • 通讯作者: 姚海荣,E-mail:xiaoyaorong123456@163.com E-mail:xiaoyaorong123456@163.com
  • 作者简介:张书齐(1991-),男,硕士,主要从事林业方面的研究。
  • 基金资助:
    海南省自然科学基金项目(417050,418MS019);国家自然科学基金地区科学基金项目(41663010);海南大学科研启动项目(kydq1604,kyqd1605)

Carbon, Nitrogen and Phosphorus Contents and Their Ecological Stoichiometry Characteristics in Leaves of Casuarina equisetifolia and Ipomoea pes-caprae in the Coastal Zone of Hainan Island

ZHANG Shu-Qi1,4, XU Quan1, YAO Hai-Rong2, YANG Qiu1,4, LIU Wen-Jie1, WANG Meng3   

  1. 1. School of Ecology and Environment, Hainan University, Haikou 570228;
    2. Sanya Academy of Forestry, Sanya 572000;
    3. College of Plant Protection, Hainan University, Haikou 570228;
    4. Hainan Academy of Forestry(Hainan Academy of Mangrove), Haikou 571100
  • Received:2019-09-29 Online:2020-03-05 Published:2020-03-06
  • Supported by:
    Natural Science Foundation of Hainan province(417050,418MS019);National Natural Science Foundation of China(41663010);Scientific Research Foundation of Hainan University(kyqd1604,kyqd1605)

摘要: 海岸带植物叶片的化学计量学特征及其影响因素可以为改善海岸带的生态环境提供理论依据。选取海南岛沿岸12个市(县)海岸带木麻黄防护林的木麻黄和周边沙滩上的藤本植物厚藤为研究对象,通过测定木麻黄与厚藤叶片中的碳(C)、氮(N)和磷(P)含量,分析两种植物叶片C、N和P的化学计量学特征及其差异,探究不同环境因子对两种植物叶片C、N、P含量、C:N、C:P和N:P的影响,以期寻找影响海岸带植被生长的主要限制因素。结果表明:海南岛木麻黄叶片C、N和P的平均含量分别是399.06±20.29、12.56±1.04、1.04±0.35 g·kg-1,C:N、C:P和N:P分别为32.04±2.82、420.65±121.27和12.92±3.21;厚藤叶片C、N和P的平均含量分别是364.31±30.20、12.84±1.96和2.06±0.64 g·kg-1,C:N、C:P和N:P分别为29.13±4.95、185.85±63.14和6.47±2.12。相关性分析结果表明:木麻黄叶片的N含量与年平均气温和年平均降水量呈显著正相关关系,P含量与年平均降水量呈极显著正相关关系,C:P和N:P与年平均降水量呈显著负相关关系;厚藤叶片C含量与年平均气温呈显著正相关,C:N与年平均降水量呈显著负相关。木麻黄叶片的N含量与10~20 cm土层的SOC呈显著负相关关系,C:N与10~20 cm土层的SOC呈显著正相关,C:P与0~10 cm土层的C:N呈显著正相关关系;厚藤叶片的C含量与10~20 cm土层的SOC呈显著负相关关系,P含量与0~10 cm土层的TN含量,N:P和10~20 cm的SOC含量呈正相关关系,C:N与0~10 cm土层的C:N呈显著正相关关系,C:P与0~10 cm的TN含量呈显著负相关关系而与0~10 cm土层的C:N呈极显著正相关关系,N:P与0~10 cm土层的TN含量呈显著负相关关系。研究结果表明海南岛海岸带植被叶片的碳氮含量较低,N可能是影响该区域植物生长的主要因子,同时,植被生长受到年平均气温、年平均降水量的共同影响,受土壤养分含量影响低,环境因子对不同类型的植物的影响并不相同。

关键词: 木麻黄, 厚藤, 叶片, 生态化学计量学

Abstract: The experiment was conducted to study the stoichiometry characteristics of the plant leaves and their influencing factors for improving the ecological environment of the coastal zone. The Casuarina equisetifolia and the Ipomoea pes-caprae on the nearby beaches of 12 cities(counties) along the coast of Hainan Island were selected as research objects. The stoichiometry characteristics and differences of C, N and P in the leaves of two plants were analyzed to explore the different environmental factors by measuring the contents of carbon(C), nitrogen(N) and phosphorus(P) in leaves of C.equisetifolia and I.pes-caprae. And the effects of C, N, P content, C:N, C:P and N:P on the leaves of the two plants were conducted. These could find the main limiting factors affecting the growth of coastal zone plants. The results showed that the average contents of C, N and P in leaves of C.equisetifolia in Hainan Island were 399.06±20.29, 12.55±1.03, 12.55±1.03 g·kg-1, respectively. The ratios of C:N, C:P and N:P were 32.02±2.8, 420.65±121.27 and 13.10±3.47, respectively. The average contents of C, N and P in leaves of I.pes-caprae were 364.31±30.20, 12.84±1.96 and 2.06±0.64 g·kg-1, respectively. The ratios of C:N, C:P and N:P were 29.13±4.95, 198.74±79.41 and 6.92±2.69, respectively. The N content in leaves of C.equisetifolia was significantly correlated with annual mean temperature(AMT) and annual mean precipitation(AMP). The P content in leaves of C.equisetifolia was significantly positive correlated with AMP. The C:P and N:P in leaves of C.equisetifolia were significantly negatively correlated with AMP. There was a significantly positive correlation between C content in leaves of I.pes-caprae and AMT. The C:N of I.pes-caprae leaves showed a significantly negative correlation with AMP. The N content in leaves of C.equisetifolia was significantly negatively correlated with the SOC of the soil at the depth of 10-20 cm. C:N was significantly correlated with the SOC of the soil at the depth of 10-20 cm. C:P was significantly correlated with C:N of the soil at the depth of 0-10 cm. The C content in leaves of I.pes-caprae was significantly negatively correlated with the SOC of the soil at the depth of 10-20 cm. The P content were significantly correlated with the TN content, N:P of the soil at the depth of 0-10 cm, and the SOC of the soil at the depth of 10-20 cm. C:N was significantly correlated with C:N of the soil at the depth of 0-10 cm. C:P was significantly negatively correlated with TN content of the soil at the depth of 0-10 cm. C:P was significantly correlated with C:N of the soil at the depth of 0-10 cm. N:P was significantly negatively correlated with TN content of the soil at the depth of 0-10 cm. The results show that the carbon and nitrogen contents of the leaves are low in the coastal zone of Hainan Island, and N may be the main factor affecting plant growth in this area. At the same time, vegetation growth is affected by the AMT and AMP. Vegetation growth was less affected by soil nutrient content. The environment factors have differently effects on different plants.

Key words: Casuarina equisetifolia, Ipomoea pes-caprae, leaves, ecological stoichiometry

中图分类号: