摘要
研究了滇中地区烤烟中部叶片旺长期 (移栽后 60～ 65d) N、K营养及 N、K平衡。结果表明 :( 1 )烟叶一般 N含量为 2 .5%～ 4% ,K含量为 1 %～ 3% ,N/K比为 2 .5～ 3.5。 ( 2 )烟叶 N含量 >4% ,就有 N过剩的症状产生。 ( 3)烟叶 N含量 <2 .5% ,K含量 <1 % ,就表现出N、K缺乏症状。 ( 4 )烟叶 N/K比失调 ,过高或过低 ,都会影响烟株正常生长。
N and K concentrations and N and K balance in tobacco middle leaves were investigated in the center of Yunnan province at the vigorous growing stage.Results showed that:(1) Generally,ranges of N and K concentrations in tobacco leaves were \{2.5%\}~4% and 1%~3%,general ranges of N/K ratio were 2.5~3.5.(2) Tobacco leaves had surplus symptoms of N,when N concentrations>4%.(3) Tobacco leaves had deficiency symptoms of N or K,when N concentrations<2.5% or K concentration<1%.(4) N/K ratio was not balance,over high or over low,might affect normal growth of tobacco plants.
出处
《西北植物学报》
CAS
CSCD
2000年第5期831-834,共4页
Acta Botanica Boreali-Occidentalia Sinica
基金
云南省烟草公司资助项目
关键词
烟叶
氮营养
钾营养
氮钾平衡
烤烟
tobacco leaves,N nutrients,K nutrients,balance of N and K
