海南橡胶林植物生态化学计量特征及影响因素  

Ecological stoichiometric characteristics and its influencing factors of rubber plantations in Hainan

作　　者：胡清 孙瑞[2,3] 杨川 张和芬[2,4] 符庆茂 吴志祥 HU Qing;SUN Rui;YANG Chuan;ZHANG Hefen;FU Qingmao;WU Zhixiang(School of Ecology,Hainan University,Haikou,Hainan 570228,China;Rubber Research Institute,Chinese Academy of Tropical Agricultural Sciences,Haikou,Hainan 571101,China;Hainan Danzhou Agro-ecosystem National Observation and Research Station,Danzhou,Hainan 571737,China;College of Tropical Crop,Yunnan Agricultural University,Puer,Yunnan 665099,China)

机构地区：[1]海南大学生态学院,海南海口570228 [2]中国热带农业科学院橡胶研究所,海南海口571101 [3]海南儋州热带农业生态系统国家野外科学观测研究站,海南儋州571737 [4]云南农业大学热带作物学院,云南普洱665099

出　　处：《森林与环境学报》2025年第2期168-176,共9页Journal of Forest and Environment

基　　金：国家自然科学基金面上项目“中国橡胶林碳汇时空差异机制研究”(32371637);中国热带农业科学院基本科研业务费揭榜挂帅项目“热带农业(橡胶林)生态系统野外观测创新研究”(1630022022003);现代农业产业技术体系建设专项“国家天然橡胶产业技术体系橡胶园生态岗位”(CARS-33-ZP3)。

摘　　要：探究不同林龄橡胶林不同植物器官及凋落叶碳氮磷含量及其生态化学计量特征,可为有效提高橡胶林生态系统生物量和生产力提供理论依据。以海南儋州市、万宁市、文昌市、琼中县和东方市等5个植胶区的橡胶林为研究对象,对5个林龄段(0~7、8~14、15~21、22~28、29~35 a)橡胶林的不同植物器官(干、根、枝、叶)及凋落叶开展研究,揭示橡胶林不同植物器官及凋落叶生态化学计量比随着林龄的变化特征,探讨海南橡胶林不同植物器官及凋落叶生态化学计量比的空间分布格局及其影响因素。结果表明,(1)海南5个植胶区的橡胶林植物器官及凋落叶碳氮磷含量及生态化学计量比差异显著(P<0.05),其中儋州植胶区橡胶林植物器官及凋落叶的碳磷比值和氮磷比值均显著大于其他植胶区。(2)随着林龄的增长,橡胶林不同器官及凋落叶的有机碳含量增加而总氮含量减少,总磷含量变化趋势不明显。(3)与植物器官相比,凋落叶中的碳磷比值和氮磷比值均相对较大;各植物器官及凋落叶中的碳氮比值随着林龄的增长而增大。(4)年降水量、相对湿度和海拔是影响橡胶树植物生态化学计量比的主要环境因子。Exploring the carbon,nitrogen,and phosphorus contents of different plant organs and apoplastic materials in rubber forests of different stand ages and their ecological stoichiometric characteristics can provide a theoretical basis for effectively improving the biomass and productivity of rubber forest ecosystems.The present study was conducted in rubber plantations across five areas in Hainan,including Danzhou City,Wanning City,Wenchang City,Qiongzhong County,and Dongfang City,and different plant organs(trunk,tree root,branch,and blade)and litter of rubber plantations of five age segments(0-7,8-14,15-21,22-28,and 29-35 a)were analyzed.The carbon,nitrogen,and phosphorus contents and their ecochemometric ratios in different rubber plantations in Hainan of different stand ages were analyzed in a comparative manner.Results showed four main findings.(1)The carbon,nitrogen,and phosphorus contents and ecological stoichiometric ratios of plant organs and litter in rubber plantations in Hainan differed significantly;notably,the carbon-to-phosphorus ratios and nitrogen-to-phosphorus ratios of plant organs and litter in Danzhou rubber plantation area were significantly higher than those in other rubber plantation areas.(2)As the stand age increased,the organic carbon content of different organs and litter in rubber plantation increased whereas the total nitrogen content decreased,and the trend of total phosphorus content was not obvious.(3)Compared with the plant organs,the carbon-to-phosphorus ratio and nitrogen-to-phosphorus ratio in the litter were relatively high.Also,the carbon-to-nitrogen ratio in the different plant organs and the litter increased with stand age.(4)Annual average rainfall,annual average relative humidity,and altitude were the main environmental factors affecting the ecological stoichiometric ratio of rubber trees.

关 键 词：橡胶林 植物器官 林龄 生态化学计量 影响因素 海南 

分 类 号：S714.2[农业科学—林学]