中国烟草学报Issue(6)：55-58,4.DOI:10.3969/j.issn.1004-5708.2013.06.008
利用15N示踪研究烤烟对氮素的吸收和分配规律
Studies on absorption and distribution of nitrogen in lfue-cured tobacco plants by15N tracer
摘要
Abstract
Ammonium and nitrate nitrogen in base fertilizer and topdressing nitrogen were marked by 15N to study nitrogen absorption and distribution influe-cured tobacco in Henan province. Results showed that: (1)Nitrogen accumulation in tobacco plant increased in the whole growing stage especially in vigorous growth period. Soil nitrogen accumulation was significantly greater than that of fertilizer nitrogen and more than 50% of nitrogen absorbed was accumulated in leaves. Nitrogen accumulation in root showed sustained increasing trend. (2) The ratio of fertilizer nitrogen to total nitrogen reduced with growth period extending and the ratio of fertilizer nitrogen to total nitrogen in leaves of different parts was in the order of lower leaves> middle leaves> upper leaves. (3)Nitrogen accumulation ability of tobacco plant was strongest 40 to 60 days after transplanting and decreased thereafter gradually. The loss of fertilizer nitrogen in tobacco plant appeared in late growth period when tobacco plant could still absorb nitrogen from soil. Nitrate nitrogen was easier to be absorbed than ammonium nitrogen in base fertilizer. Top dressing nitrogen was easier to be absorbed.关键词
烤烟/15N/吸收/分配Key words
flue-cured tobacco/15N-trace/absorption/distribution分类
农业科技引用本文复制引用
时向东,刘喜庆,王振海,牛书金,程玉渊..利用15N示踪研究烤烟对氮素的吸收和分配规律[J].中国烟草学报,2013,(6):55-58,4.基金项目
中国烟草总公司“浓香型特色优质烟叶开发”项目 （）
