WANG Xu
Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, ChinaLIU Jingkun
Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520, ChinaLUO Shuixing
Experimental Station of Research Institute of Tropical Forestry, Chinese Academy of Forestry, Ledong 572542, Hainan, ChinaZHAO Kunkun
Experimental Station of Research Institute of Tropical Forestry, Chinese Academy of Forestry, Ledong 572542, Hainan, ChinaLI Xinjian
Central South Inventory and Planning Institute of State Forestry and Grassland Administration, Changsha 410014, ChinaFundamental research Funds of CAF(Grant No. CAFYBB2018MB015)
Leaf functional traits are closely related to plant growth strategies and resource utilization ability. In order to explore the adaptation strategies of psammophytes to environment in Hainan Island, the leaf functional traits of Vitex trifolia, Clerodendrum inerme, Lantana camara, Eupatorium odoratum, Stachytarpheta jamaicensis and Ipomoea pes-caprae and their relationships with soil chemical properties were analyzed. The results showed that the leaf functional traits of tropical psammophytes were different among species, which were affected not only by species but also by soil factors. The specific leaf area of species were in the order of herb>shrub>vine. The N/P ratio of leaves ranged from 7.78 to 10.85, suggesting that the growth of tropical psammophytes was restricted by soil N. The variation coefficient of Na content in leaves was the highest, ranging from 18.46% to 76.36%, indicating that species had a great difference in the absorption of Na+, which would affect its natural distribution in coastal sandy land. The specific leaf area, leaf dry matter content had negative correlations with K and Na contents in leaves, as well as N/P ratio of leaves with Na content in soil, Na content in leaves with soil organic carbon, total P and total K, implying that sandy plants adapted to salt stress through specific leaf area change. Therefore, applying soil fertilizer would be an important measure for rapid restoration of coastal sandy vegetation, and the Na+ content in leaves could be used as the main index for salt-tolerance screening of sandy plants in tropical coast.
王旭,刘敬坤,罗水星,赵坤坤,李新建.海南岛滨海沙生植物叶片功能性状分异及其与土壤因子的关系[J].热带亚热带植物学报,2022,30(5):708~717
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