应用15^N示踪技术研究橡胶树幼苗对不同氮肥的吸收和分配  

Different Nitrogen Fertilizers Absorption and Distribution in Rubber Tree(Hevea brasiliensis) Seedlings Using ^(15)N Tracer Technique

作　　者：杜海燕[1,2] 王大鹏[2,3] 王文斌[2,3] 罗雪华[2,3] 潘中耀[2] 张永发[2,3] 吴小平[2,3] 

机构地区：[1]海南大学农学院.海南海口570228 [2]中国热带农业科学院橡胶研究所,海南儋州571737 [3]中国热带农业科学院土壤肥料研究中心,海南儋州571737

出　　处：《热带作物学报》2015年第6期1019-1024,共6页Chinese Journal of Tropical Crops

基　　金：中央级科研院所基本业务费项目(No.XJSYWFZX2009-17);现代农业产业技术体系建设专项(No.CARS-34-GW6)

摘　　要：采用15N示踪技术研究橡胶树幼苗对尿素、硫酸铵、硝酸钙及硝酸铵等4种氮肥的吸收和分配特征。结果表明:施用尿素、硫酸铵的胶苗生长要显著优于硝酸钙;各器官对4种氮肥的吸收和分配并不一致;器官中15N丰度大致以形成层最高,叶片、粗根和叶柄最低;15N示踪下4种氮肥利用率介于18.04%~19.03%,但差异不显著;4种氮肥的表观利用率以尿素和硫酸铵处理的最高,分别为20.18%和19.53%,硝酸钙处理的最低,仅有9.25%。综上所述,盆栽试验条件下酰胺态和铵态氮肥的表观利用率要优于硝态氮肥。The characteristics of the absorption and distribution of four nitrogen fertilizers： urea, ammonium sulfate, calcium nitrate and ammonium nitrate in rubber tree （Hevea brasiliensis） seedlings were studied using 15^N tracer technique through pot experiment. The results showed that the rubber tree seedlings receiving the urea, ammonium sulfate fertilizer grew significantly better than those receiving the calcium nitrate; The absorption and distribution nitrogen were uneven in different organs. The 15^N abundance in cambium was highest, while those in leaf, coarse root and petiole were minimum; The recovery efficiency of the four nitrogen fertilizers ranged from 18.04% to19.03% under 15^N tracer, but the difference were not significant; Apparent nitrogen fertilizer recovery of urea and ammonium sulfate were the highest in four nitrogen fertilizers, which were 20.18% and 19.53%, respectively. Calcium nitrate was the lowest, which was only 9.25%. In summary, apparent nitrogen fertilizer recovery of amide nitrogen fertilizer and ammonium nitrogen fertilizer performed better than the nitrate nitrogen fertilizer for rubber tree （Hevea brasiliensis） seedling growth in the pot experiment.

关 键 词：橡胶树 15^N标记氮肥 吸收和分配 

分 类 号：S143.1[农业科学—肥料学]