摘要
研究幼林早期(2龄)、幼林晚期(7龄)、开割树(16龄)和老龄即将更新树(30龄)4种不同树龄橡胶树林地的土壤有机碳含量与储量特征。结果表明:(1)不同树龄橡胶树林地各土壤层次土壤有机碳含量变化不大,但普遍表现为表层土壤(0~15cm土层)有机碳含量高于平均值,下层土壤(45~60cm土层)有机碳含量低于平均值,中间两层的(15~30cm土层、30~45cm土层)变化不大,在平均值的上下浮动;(2)不同树龄橡胶树林地土壤有机碳含量介于6.03~7.78g/kg之间,相互间存在显著差异,高低排序为幼林晚期(7龄)>老龄即将更新树(30龄)>幼林早期(2龄)>开割树(16龄);(3)胶林有机碳储量主要决定于其土壤有机碳含量和土壤容重,不同树龄橡胶树林地土壤有机碳储量介于61.33~74.29t/hm2之间,相互间存在差异,高低排序为老龄即将更新树(30龄)>幼林晚期(7龄)>幼林早期(2龄)>开割树(16龄)。
Characteristics of soil organic carbon (SOC) in rubber plantations at 4 different ages in the west of Hainan Island were analyzed in order to catch its characteristics in rubber plantation ecosystem and to evaluate the ecological benefit of the plantations and replantation of rubber trees in tropical areas. The SOC contents of different soil layers in rubber plantations at 4 different ages varied a little, but generally the SOC content was higher in the surface layer (0~15 cm), lower in the lower layer (45~...
出处
《热带作物学报》
CSCD
2009年第2期135-141,共7页
Chinese Journal of Tropical Crops
基金
中央级科研院所基本科研业务费项目“橡胶林生态系统长期定位观测”(No.XJSYWFZX2008-14,No.xjxzx-2007-2)
海南省自然科学基金项目(No.807045)资助。
关键词
不同树龄
橡胶林
土壤有机碳
含量
储量
rubber trees at different ages
rubber (Hevea brasiliensis) plantations
soil organic carbon
content
storage