海南橡胶林土壤生态化学计量特征及影响因素  

Soil ecological stoichiometric characteristics and influencing factors of rubber forest in Hainan Province

作　　者：胡清 孙瑞[1,3] 杨川 张盈盈[1,3] 符庆茂 吴志祥[1,3] HU Qing;SUN Rui;YANG Chuan;ZHANG Yingying;FU Qingmao;WU Zhixiang(Rubber Research Institute,Chinese Academy of Tropical Agricultural Sciences,Haikou,Hainan 571101,China;Hainan University School of Ecology,Haikou,Hainan 570228,China;Hainan Danzhou Agro-ecosystem National Observation and Research Station,Danzhou,Hainan 571737,China)

机构地区：[1]中国热带农业科学院橡胶研究所,海南海口571101 [2]海南大学生态学院,海南海口570228 [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

出　　处：《森林与环境学报》2024年第6期600-607,共8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：探究海南不同地区不同林龄橡胶林土壤碳、氮、磷生态化学计量特征,为揭示橡胶林土壤养分分布规律及养分管理提供理论依据。以海南文昌市、琼中县和东方市3个橡胶种植区土壤为研究对象,对5个林龄段(0~5、6~10、11~15、26~30、31~35 a)橡胶林的6个土层深度(0~10、10~20、20~40、40~60、60~80、80~100 cm)开展研究,分析海南橡胶林土壤养分含量及碳、氮、磷生态化学计量比的时空分布特征及影响因素。结果表明,(1)3个研究区橡胶林土壤养分含量及生态化学计量比差异显著(P<0.05),土壤有机碳、全磷含量均为文昌>东方>琼中,全氮含量为东方>文昌>琼中,土壤碳氮比表现为文昌显著高于琼中和东方(P<0.05),土壤碳磷比和氮磷比则文昌显著低于其他两个地区(P<0.05)。(2)不同林龄橡胶林土壤养分及生态化学计量比差异明显,其中6~10 a橡胶林土壤有机碳含量和碳氮比最高,0~5 a橡胶林土壤全磷含量最高,31~35 a橡胶林土壤全氮含量、碳磷比和氮磷比最高。(3)从土层垂直分布看,橡胶林土壤有机碳、全氮含量、碳磷比及氮磷比随着土层深度的增加整体呈现递减趋势,土壤全磷含量和碳氮比随着土层深度增加无显著差异。(4)冗余分析表明,海拔、坡度、土壤容重、土壤含水量和郁闭度是影响橡胶林土壤碳、氮、磷含量的主要影响因素。This study aims to provide a theoretical basis for revealing the distribution of soil nutrients and nutrient management of rubber forests in different regions and ages of rubber forests in Hainan Province.The study was conducted on the soil of three rubber planting areas in Wenchang City,Qiongzhong County,and Dongfang City,Hainan Province.Six soil depths(0-10,10-20,20-40,40-60,60-80,80-100 cm)of rubber forests in five age groups(0-5,6-10,11-15,26-30,31-35 a)were used to analyze the spatiotemporal distribution characteristics and influencing factors of soil nutrient content and the ecological stoichiometry of carbon,nitrogen,and phosphorus in rubber forests in Hainan Province.The results showed that(1)there were significant differences in the soil nutrient content and ecological stoichiometry of rubber forests in different regions of Hainan(P<0.05).The organic carbon and total phosphorus contents in the soil followed the order of Wenchang>Dongfang>Qiongzhong,and the total nitrogen content followed the order of Dongfang>Wenchang>Qiongzhong.The soil carbon-to-nitrogen ratio was significantly higher in Wenchang than in Qiongzhong and Dongfang(P<0.05),whereas soil carbon-to-phosphorus and nitrogen-to-phosphorus ratios were significantly lower in Wenchang than in the other two regions(P<0.05).(2)There were significant differences in soil nutrients and ecological stoichiometry between rubber forests of different ages.Among them,the organic carbon content and carbon-nitrogen ratio of rubber plantations aged 6-10 a were the highest;the total phosphorus content of rubber forests aged 0-5 a was the highest;and the total nitrogen content,carbon phosphorus ratio,and nitrogen phosphorus ratio of rubber forests aged 31-35 a were the highest.(3)From the vertical distribution of soil layers,the organic carbon,total nitrogen content,carbon to phosphorus ratio,and nitrogen to phosphorus ratio of rubber forest soil showed an overall decreasing trend with increasing soil depth.There was no significant difference in the soil′s total

关 键 词：橡胶林 土壤养分 生态化学计量 影响因素 海南 

分 类 号：S714.2[农业科学—林学]