^(15)N示踪探究烤烟氮素吸收分配规律  

Study on Nitrogen Absorption and Distribution Patterns in Flue-cured Tobacco by ^(15)N Trace

作　　者：刘喜庆[1] 林开创[1] 王旭峰[1] 王林芝[1] 时向东 

机构地区：[1]河南农业大学国家烟草栽培生理生化研究基地,河南郑州450002

出　　处：《江西农业学报》2013年第4期76-77,84,共3页Acta Agriculturae Jiangxi

基　　金：中国烟草总公司项目"浓香型特色优质烟叶开发"(Ts-01-2011005)

摘　　要：通过大田试验,利用15N示踪研究了烤烟大田各生育期对肥料氮的吸收分配规律。结果显示:烟株偏向吸收硝态氮,且吸收的硝态氮主要分布在叶片和茎中;烟株吸收的追肥氮占吸收肥料氮的比例随生育期的推进而不断增加;成熟叶片中肥料氮占总氮的比例不足两成,且随叶位上升而不断下降。Nitrogen absorption and distribution patterns in flue - cured tobacco at different growth stages were studied through 15 N - labelled field experiment. The results showed that the tobacco plants absorbed more nitrate nitrogen than ammonium nitrogen, and the absorbed nitrate nitrogen was mainly accumulated in leaves and stems. The ratio of the absorbed top dressing nitrogen to the absorbed total nitrogen fertilizer gradually increased with the advance of growth period. The ratio of nitrogen fertilizer to total nitrogen in mature leaves was less than 20%, and it continued to decline with the rising of leaf position.

关 键 词：烤烟 15N示踪 氮素形态 追肥 成熟叶片 吸收和分配 

分 类 号：S572.062[农业科学—烟草工业]