烤烟栽培若干农艺措施的产质效应——Ⅰ.农艺措施与产量

EFFECTS OF VARIOUS AGRICULTURAL MEASURES ON THE YIELD AND QUALITY OF FLUE-CURED TOBACCO I.THE YIELD AND AGRONOMIC MEASURES

在试验处理范围的大田施氮量与烤烟产量显著正相关,密度与产量正相关;高氮水平下以较少留叶数具产量优势,低氮水平下适当多留叶具产量优势,现蕾或现蕾前打顶处理产量高于开花打顶。单叶重与烤烟产量显著正相关,是决定产量的主导因素。施氮、打顶留叶、密度等处理通过影响不同叶层的单叶面积和比叶重而提高或降低单叶重。

There was a significant positive correlation between the yield of flue-cured tobacco and theamount of nitrogen applied or plant population.High yields could be obtained from the treatments of lessleaves for high nitrogen levels,and the treatment of more leaves for low nitrogen levels.Topping in squaringprovided higher yields than that in flowering.The weight of single leaf was the major factor for yields,and alinear correlation existed between them.The treatments changed the weight of single leaf by effecting leafarea and specific leaf-gravities.