福建东山地区沿海沙地不同林地土壤碳氮储量

Soil Carbon and Nitrogen Storage of Different Forest Lands in Dongshan Area of Fujian Province

[目的]研究沿海沙地不同林地土壤碳氮储量。[方法]以福建东山沿海地区林地为研究对象,对各林地不同土层采用剖面法调查和测量各土层全碳、全氮含量,并进行分布格局研究。[结果]同一树种全氮、全碳储量随土层深度增加逐渐减少,不同林地土壤碳储量均集中在0~30 cm厚土层中;4种林地土壤碳氮储量从大到小依次为木麻黄、桉树、湿地松、竹子。[结论]木麻黄相比其他3个树种在沿海沙地具有更好的碳氮储存能力。

[ Objective ] To research the soil carbon and nitrogen storage in different forest lands. [ Method] With forest land in Dongshan Area of Fujian Province as the research object ,cross-section method was used to investigate the different soil layers in different sample fields. Total carbon and total nitrogen were detected in each soil layer. And distribution pattern was researched. [ Result] Total carbon and total nitrogen contents of the same tree species gradually reduced with the increase of soil depth. Soil carbon contents in different forest lands were concentrated in 0 -30 cm soil layer. Soil carbon and nitrogen storages in four forest lands were in the order of Cusuarina equisetifolia Forst. 〉 Eucalyptus robusta Smith 〉 Pinus elliottii 〉 Bambusoideae. [ Conclusion] Compared with other three tree species,C, equisetifolia Forst had better carbon and nitrogen stor- age capacity in coastal sandy land.