海南省西部热带雨林次生林土壤有机碳的分布特征  

Distribution Characteristics of Soil Organic Carbon in Western Secondary Tropical Rainforestin Hainan Province

作　　者：吴慧 赵志忠 王军广[2] 陈红利 霍红义 吴雯 Wu Hui;Zhao Zhizhong;Wang Junguang;Chen Hongli;Huo Hongyi;Wu Wen(Hainan Normal University,Haikou 571158,P.R.China)

机构地区：[1]海南师范大学地理与环境科学学院,海口571158 [2]海南师范大学,海口571158

出　　处：《东北林业大学学报》2022年第9期85-89,共5页Journal of Northeast Forestry University

基　　金：海南省院士创新平台项目(YSPTZX202024);海南省研究生创新项目(Qhys2021-299)。

摘　　要：在海南省西部尖峰岭、霸王岭、鹦哥岭山区各布置了11个采样区进行柱状样品采集,每个样区各采样点分层采集距离地表面0<h≤10 cm、10 cm<h≤30 cm、30 cm<h≤50 cm土样进行土壤有机碳测定。研究结果表明:与海南土壤样品背景值相比,海南省西部热带山地雨林次生林土壤有机碳(SOC)质量分数较高,在空间上,平均土壤有机碳质量分数由小到大依次为尖峰岭、霸王岭、鹦哥岭;在垂直方向上,从表层向底层逐渐递减,表聚性明显;尖峰岭、霸王岭、鹦哥岭SOC质量分数与土壤粒度有密切联系。西部山区pH随土层深度增加而递增,且其与有机碳均呈负相关,两者的相关性强弱依次为鹦哥岭、霸王岭、尖峰岭。热带地区黏土和微酸性土壤有利于固碳。Eleven sampling areas were arranged in Jianfengling,Bawangling and Yinggeling in western Hainan Province for column sample collection.Soil samplesfrom the ground surface were collected.Compared with the background value of soil samples in Hainan province,soil organic carbon(SOC)content in the secondary forest of tropical mountain rainforest in western Hainan Province was higher,and the spatial average SOC content was in the ascending order of Jianfengling,Bawangling,andYinggeling.In the vertical direction,it gradually decreases from the surface layer to the bottom layer.The SOC content in Jianfengling,Bawangling and Yinggeling was closely related to soil particle fraction.The pH value was increased with the increase of soil depth,and there was a negative correlation between pH value and organic carbon.The correlation between pH value and organic carbon was in the descending order of Yinggeling,Bawangling,and Jianfengling.Tropical clays and slightly acidic soils are good for carbon sequestration.

关 键 词：海南省西部山区 次生林 土壤有机碳 粒度分布 

分 类 号：K921[历史地理—人文地理学]