海南琼中橡胶林土壤磷储量研究  

Phosphor Reserves of Rubber Plantations in Qiongzhong,Hainan Island

作　　者：范美莉[1] 王旭[1] 吴志祥[2,3] 陈德祥[4] 杨峰[5] 

机构地区：[1]海南大学环境与植物保护学院,海南海口570228 [2]农业部儋州热带农业资源与生态环境重点野外科学观测试验站,海南儋州571737 [3]中国热带农业科学院橡胶研究所/农业部橡胶树生物学重点开放实验室,海南儋州571737 [4]中国林业科学研究院热带林业研究所,广东广州510520 [5]海南大学农学院,海南海口570228

出　　处：《热带农业科学》2012年第4期32-37,共6页Chinese Journal of Tropical Agriculture

基　　金：国家发改委员会;中国科学院战略性先导科技专项子课题(No.XDA05050206);农业部儋州热带农业资源与生态环境重点野外科学观测试验站开放课题基金项目(No.DKFS0903);中国林业科学研究院热带林业研究所重点专项业务研究项目第三子课题(No.2007-1/03);海南大学科技基金项目(No.hd09xm50);海南大学‘211工程’建设项目;海南大学环境与植物保护学院研究生创新平台项目

摘　　要：磷是植物生长不可缺少的大量营养元素,研究琼中橡胶林土壤磷储量及分布规律有利于指导施肥,并对热带地区主要橡胶林土壤磷循环研究具有特殊意义。对海南琼中6个龄级(5、10、15、20、25、30年)的橡胶林土壤(土壤分级:0～20、20～40、40～60、60～80、80～100 cm)进行调查采样,室内测试分析其磷含量,计算土壤各个层次的磷储量。研究结果表明:(1)琼中橡胶林土壤全磷含量为57.68 mg/kg,有效磷含量为2.25 mg/kg,全P含量在土壤剖面中无明显的分布规律,有效P含量大致随剖面深度的增加而减少;(2)琼中橡胶林土壤全磷总储量为843.25 kg/hm2,有效磷储量为32.12 kg/hm2。20～40 cm的全磷储量和有效磷储量均最大,分别占31.18%和28.18%。琼中橡胶林土壤总体处于缺磷状态,有必要增施磷肥或复合肥。Phosphorus （P） is indispensability nutrient for vegetation growth. Research on the soil＇s P reserves and distribution rule is good for guiding fertilization, and makes special sense to the soil＇s P cycle of main rubber plantations of tropical region. The rubber plantations are divided into six age levels which are 5 year-old, 10 year-old, 15 year-old, 20 year-old, 25 year-old and 30 year-old, and the soil is divided into 0~20 cm, 20~40 cm, 40~60 cm, 60~80 cm, 80~100 cm. The six age-level rubber plantations in Qiongzhong were investigated and sampled, testing and analyzing phosphor content indoor and then phosphor reserves of each layer can be gained. The results list as follows： （1） The soil＇s total P content of rubber plantation in Qiongzhong was 57.68 mg/kg, and the efficiency P content was 2.25 mg/kg. The totalP content had not obvious distribution rule in the section plane, but the efficiency P content decreased with the increase of soil depth; （2） The soil＇s total P reserves of rubber plantation in Qiongzhong was 843.25 kg/hm：, and the efficiency P content was 32.12 kg/hm2. The total and efficiency phosphor reserves of 20~40 cm were all the biggest, accounted for 31.18 and 28.18% respectively. The soil of rubber plantations in Qiongzhong was under the condition of lacking P collectively, it was necessary to fertilize with P or compound fertility.

关 键 词：琼中 橡胶林 土壤 磷含量 磷储量 

分 类 号：S794.1[农业科学—林木遗传育种] Q948.113[农业科学—林学]