局部施磷对橡胶树根系及植株生长的影响  

Effect of Localized Supply of Phosphatic Fertilizer on Roots and Plant Growth of Hevea brasiliensis

作　　者：华元刚[1] 王羽[1] 贝美容[1] 罗微[1] 林钊沐[1] 

机构地区：[1]中国热带农业科学院橡胶研究所,海南儋州571737

出　　处：《热带农业科学》2012年第7期1-4,8,共5页Chinese Journal of Tropical Agriculture

基　　金：国家现代农业产业技术体系建设专项资金(No:CARS-34-GW6);中国热带农业科学院橡胶研究所基本科研业务费(No:1630022012003)

摘　　要：采用盆栽分根试验,设计了5个局部施磷区比例,研究了局部等量施磷对橡胶树幼苗根系及植株生长的影响。结果表明:局部施磷区占盆栽土壤1/4以上时,可促进根系的发生,根系总长度及根系总表面积增加,但植株叶片磷含量及株高无显著影响;局部施磷区占盆栽土壤1/4以下时,根系数量、总长度、总表面积、生物量、叶片磷含量及株高均显著下降。Under the condition of pot experiment, the rubber tree roots were treated with phosphatic fertilizer supplying by 5 localized area rates, the effect of supplying fertilizer locally on roots and plant growth was studied. Results indicated that, compared with CK （supply complete phosphate on whole roots）, the roots under controlled conditions （more than a quarter percent） were stronger, with more lateral roots, the total length the absorbed area increased, but no obvious response to leaf P content and shoot height. The base traits group （including quantity, total length, the absorbed area, biomass of the root, leaf P content and shoot height） showed negative response to the localized area rates which less than a quarter percent. These effects indicated that phosphate has an important function to the roots.

关 键 词：橡胶树 局部施磷 根系 

分 类 号：S794.1[农业科学—林木遗传育种]