早期施用氮肥在乙烯利刺激割胶胶乳中的动态分布研究  

Distribution of Early Applied Fertilizer N in Latex Under Ethrel Stimulation Tapping

作　　者：王文斌[1,2,3] 郭海超[2,3] 罗雪华[2,3] 张兴健[1] 吴小平[2,3] 陈秋波[1,2] 

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]农业部橡胶树生物学重点开放实验室省部共建国家重点实验室培育基地一海南省热带作物栽培生理学重点实验室,海南儋州571737

出　　处：《热带作物学报》2015年第6期1013-1018,共6页Chinese Journal of Tropical Crops

基　　金：农业部橡胶树生物学重点实验室开放课题(No.KLOF1002);现代农业产业技术体系建设专项(No.CARS-34-GW6)

摘　　要：应用15N示踪技术进行橡胶树大田早期肥料试验,研究乙烯利刺激和传统割胶条件下胶乳中肥料氮素的动态变化。结果表明,在施肥26 d后肥料N开始在胶乳中表现,刺激与传统割胶条件下,胶乳中15N丰度均逐步增加,变化趋势相似;随着时间的推移,刺激割胶条件下15N的丰度增加幅度显著高于传统割胶处理,胶乳中Ndff%值随时间延长而逐步增加。从Ndff%值来看,刺激割胶条件下橡胶树对肥料氮素的征调能力强于传统割胶处理。刺激割胶条件下的胶乳肥料氮流失量显著大于传统割胶处理,但两者带走的肥料氮素占氮肥施用量的比例都不高,分别仅为0.18%和0.05%。Field experiment was carried to study dynamic distribution of fertilizer N in rubber latex under Ethrel stimulation with 15^N isotope tracing technique at early stage of the year. The results showed that fertilizer N could be determined at 26 d after fertilization. The abundance of 15^N gradually increased as time went on whether for stimulation treatment or conventional treatment. The increment of 15^N abundance was significantly higher under stimulation tapping than that under conventional tapping over time. The Ndfff% value gradually increased along with 15^N abundance. The absorption capacity of rubber tree was enhanced under stimulation, according to the changes of Ndfff%. And fertilizer N effusion through latex harvest was also significantly higher under stimulation. However, the proportion of fertilizer N effusion under both Ethrel stimulation treatment and conventional treatment were low, which accounted 0.18% and 0.05% of total fertilizer N, respectively.

关 键 词：15^N示踪 橡胶树 刺激割胶 胶乳 氮素变化 

分 类 号：S143.1[农业科学—肥料学]