摘要
研究旨在探讨海南岛尖峰岭地区常见 7 种植物叶片养分含量的季节动态变化.鉴于植物叶片养分含量对环境变化的敏感性,研究选取了春季和冬季作为研究时间点,对 7 种常见植物叶片进行了氮、磷、钾、钙、镁 5 种主要养分元素的分析.结果表明,不同树种的叶片养分含量随季节变化而异.其中,幌伞枫、潺槁木姜子、黄槿、木麻黄、九节的叶片氮含量在冬季较春季有所增加,而岭南山竹子和椰子则有所减少;磷含量在岭南山竹子和潺槁木姜子中呈现下降趋势,而钾含量在黄槿和木麻黄中有所增加;钙含量在幌伞枫、椰子、潺槁木姜子、木麻黄、九节中增加,而岭南山竹子和黄槿中减少;镁含量在 6 种树种中增加,唯有潺槁木姜子减少.研究为热带森林生态系统中养分循环的季节性变化提供了基础数据,并为森林养分管理和生态保护提供了科学依据.
Abstract
This study aimed to investigate the seasonal dynamics of leaf nutrient content in seven typical species in the Jianfengling area in Hainan Island.Given the sensitivity of leaf nutrient content to environmental changes,leaves were analyzed for five major nutrient elements in spring and winter,including nitrogen,phos-phorus,potassium,calcium,and magnesium.The results showed that the leaf nutrient contents of different tree species varied with seasons,among which the nitrogen of Heteropanax fragrans,Litsea glutinosa,Talipariti tiliaceum,Casuarina equisetifolia,and Psychotria asiatica increased in the winter compared to the spring when that of Garcinia oblongifolia and Cocos nucifera decreased.Phosphorus content showed a decreasing trend in G.oblongifolia and L.glutinosa,and potassium content increased in T.tiliaceum and C.equisetifolia.Calcium content increased in H.fragrans,C.nucifera,L.glutinosa,C.equisetifolia,and P.asiatica,while it decreased in G.oblongifolia and T.tiliaceum.Magnesium content increased in most tree species and decreased only in L.glutinosa.This study provides important insights into seasonal changes in nutrient cycling in tropical forest e-cosystems and provides a scientific basis for forest nutrient management and ecological conservation.
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万方数据