Effects of Increasing Plant Density and Reducing Leaf Number and Nitrogen Amount on Upper Leaf Quality and Aroma
LI Chuansheng
SHI Hongzhi
LI Huaiqi
XU Dongya
WEI Yuehui
YU Qiwei
HUANG Huagang
Abstract：In order to increase the proportion of quality tobacco and the availability of upper tobacco leaves,the field experiment was set up at Bijie of Guizhou province in 2014 to investigate the effect of different planting model(commonly used model as control with transplanting density of 16 530 plants/ha,22 leaves per plant and nitrogen amount of 90 kg/ha;increasing density and reducing leaf number;increasing density and reducing leaf number and nitrogen amount) on the contents of plastid pigment and aroma components and economic characters of tobacco leaves.Experimental results showed that increasing plant density with less nitrogen fertilization and less leaves promoted leaf maturity and improved the coordination of chemical components and increased aroma quality of upper leaves.Compared with the control group,increasing plant density and reducing leaf number and nitrogen amount gave rise to greater plastid pigment degradation in the late growth stage of tobacco plant;the output value of flue-cured tobacco and the proportion of mediun tobacco increased significantly;the nitrogenous substances reduced,while the contents of sugar and the coordination of chemical composition increased,aroma content increased significantly;the aroma quality of upper leaves was improved with more aroma sweeter feeling and less irritation.Upon comprehensive analysis,the optimal model for improving the quality of upper leaves was 18 195-20 205 plants/ha with 18-20 leaves per plant and 80％ of nitrogen amount of control,which was suitable for further demonstration and application in Bijie of Guizhou.
Keywords：flue-cured tobaccodense planting with less nitrogen fertilization and less leavestobacco qualityaroma substance
Publication Date：2017-04-02
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 32-37,48 )