摘要
采用盆栽试验,利用15N示踪研究了烤烟对不同形态氮的吸收利用规律。结果表明,烤烟各部位叶片对氮素的积累量表现为中部叶>上部叶>下部叶;肥料氮进入的比例具有下部叶>中部叶>上部叶的规律。不同生育期肥料氮进入烟叶中的比例,以团棵期最高,之后肥料氮进入的比例减少,统计分析结果表明(5%水平),从现蕾期到成熟期之间差异不大。同位素15N标记肥料施入土壤后约39%～53%被烟株吸收利用,约22%～41%损失,约20%～37%残留于土壤中。
With the development of the methods of planting in frame and isotope tracer technique, the absorption and distribution of N nutrients of the main variety Longjiang 911 of flue - eured tobaeeo of Heilongjiang province were eondueted. The results showed that the N aceumulations of flue - eured tobaeeo increased as the order of bottom leaves, topping leaves, middle leaves; on the eontrary, the proportion of fertilizer N absorbed by flue- cured tobaeeo increased as topping, middle, bottom leaves; the ratio of feltilizer N into tobacco leaves was highest in seedling stage and decreased gradually with the extension of growing period, but there were small differenees from budding to mature period by 5% level of statisties result, ^15N tracer showed that after the application of ^15N fertilizer in soil 39%- 53% of total N was utilized; 22%-41% lost; 20%- 37% residued in soil.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2007年第2期43-45,共3页
Soil and Fertilizer Sciences in China
关键词
^15N示踪
烤烟
氮的吸收及分配
^15N tracer
flue- cured tobaeeo
absorption and distribution of nitrogen
