15N示踪探究烤烟氮素吸收分配规律

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。...

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Bibliographic Details
Published in江西农业学报 Vol. 25; no. 4; pp. 76 - 77
Main Author 刘喜庆 林开创 王旭峰 王林芝 时向东
Format Journal Article
LanguageChinese
Published 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 2013
Subjects
15N示踪
吸收和分配
成熟叶片
氮素形态
烤烟
追肥
15N示踪
吸收和分配
成熟叶片
追肥
烤烟
氮素形态
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ISSN1001-8581

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Summary: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。
Bibliography:36-1124/S
Flue - cured tobacco; 15 N trace ; Nitrogen form ; Top dressing; Mature leaves ; Absorption and distribution
LIU Xi - qing, LIN Kai - chuang, WAGN Xu - feng, WANG Lin - zhi, SHI Xiang - dong （National Tobacco Cultivation ＆ Physiology ＆ Biochemistry Research Center, Henan Agricultural University, Zhengzhou 450002, China）
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.
ISSN:1001-8581