Estimation of Biological Nitrogen Fixation Capacity by Sugarcane Using 15N  

15N测定甘蔗生物固氮能力研究（英文）

作　　者：杨荣仲[1,2] 谭裕模[2] 桂意云 谭芳 李杨瑞[2,3] 

机构地区：[1]广西甘蔗研究所,广西南宁530007 [2]中国农科院甘蔗研究中心,广西南宁530007 [3]广西农业科学院,广西南宁530007

出　　处：《Agricultural Science & Technology》2008年第2期154-156,共3页农业科学与技术（英文版）

基　　金：National Natural Science Foundation of China (30260054;30660085);Key Project of Guangxi Academy of Agricultural Sciences (2004002);Natural Science Foundation in Guangxi Zhuang Autonomous Region (0639011)~~

摘　　要：[ Objective] The study aimed to reveal the biological nitrogen fixation capacity by sugarcane from Brazil under the ecological conditions of Guangxi, and to provide reference for study on the biological nitrogen fixation capacity by sugarcane and related generalization and application. [ Method] The ^15N isotopic fertilizer was solely applied on plants of three sugarcane cultivars planted in greenhouse with no other fertilizer forms applied, meanwhile virus-free stem seedling was regarded as control, to measure their biological nitrogen fixation capacity using ^15N isotope. [ Result ] The nitrogen fixation rate of B8 from Brazil reached 26.91%, while Guitang 11 and RIC16 presented no or poor nitrogen fixation capacity. [ Conclusion] The sugarcane eultivar B8 from Brazil showed some nitrogen fixation capacity under the ecological conditions of Guangxi.国内、外甘蔗生产中的氮肥施用量分别为500～750、100～200kg／hm^2。巴西甘蔗产量约为80t／hm^2，因使用固氮甘蔗品种和相应的固氮技术，其施用的氮肥量，仅为广西的1／10，氮肥投入量远远小于甘蔗收获从土壤中带走的氮素量。笔者在开展甘蔗品种固氮特性研究过程中，进行了^15N同位素稀释试验，以了解在广西生态条件下，甘蔗品种的固氮能力。

关 键 词：SUGARCANE Biological nitrogen fixation ^15N isotope 

分 类 号：S566.1[农业科学—作物学]