Effects of measures to increase planting density and reduce leaf retention on the growth,photosynthetic characteristics,yield and quality of flue-cured tobacco
In order to improve the proportion of high-quality tobacco leaves and the industrial availability of tobacco raw materials,Yunyan 87 was studied in Guangyuan tobacco-growing area of Sichuan Province,and two factors of planting density and number of leaves were used to design a randomized block experiment,aiming to clarify the effects of different planting density and the number of leaves on the yield and quality of flue-cured tobacco.The results showed that when the planting density of flue-cured tobacco was in-creased appropriately and the number of leaves was decreased,flue-cured tobacco could achieve normal growth and development,and compared with other treatments,flue-cured tobacco had significant advantages in leaf development;under medium and low density and medium and low number of leaves,the photosynthetic capacity of tobacco leaves was stronger;under M2 density and L2 leaves,flue-cured tobacco achieved better performance in average price,and the proportion of medium and high-grade tobacco,and the out-put value was the highest.In addition,the appropriate increase in density and decrease in the number of leaves left reduced the nico-tine content of leaves after roasting,increased the content of reducing sugar,total sugar and sugar-base ratio,and the chemical com-position was more coordinated,which had a significant advantage in tobacco quality evaluation.According to comprehensive analysis,the tobacco quality in Guangyuan tobacco growing area,Sichuan Province was better when the planting density was 18 750 plants/hm2 and the number of leaves left was 16～18 leaves per plant.
planting densitynumber of leaves leftflue-cured tobaccogrowthphotosynthetic characteristicsyield and quality
万方数据
维普
