Main Quality Traits of KRK26 Tobacco Leaves and the Correlation with Meteorological Factors in Lijiang, Yunnan Province

PurposeIn order to study the main quality traits of KRK26 tobacco leaves in Lijiang, Yunnan Province and their correlation with meteorological factors, provide reference for enhancing the contribution of foreign introduced varieties to the production of “tobacco leaves and cigarettes” and the formulation design of cigarette industry.

MethodDescriptive statistics, variance and stepped-regression analysis were used to analyze 48 KRK26 leave samples collected in Yulong County, Lijiang City from 2014 to 2017. Stepwise regression analysis were used to analyze the correlation between tobacco leaves in different parts and main meteorological factors in Lijiang tobacco area.

Results1) The average air temperature of the growing season (May-September) for Lijiang flue-cured tobacco was “low in the two sides, high in the middle”, the monthly average temperature was 18.3 ℃, the monthly average sunshine time was 155.3 h, the monthly average precipitation was 161.0 mm. 2) The output value of KRK26 was 80 568 Yuan/hm², the yield was 2 898 kg/hm², the number of effective leaves was 18-20, and the comprehensive score of the upper and middle leaves was extremely significantly higher than that of the lower leaves (P<0.01). The total sugar content of three-part tobacco leaves was higher, and the total alkaloid content of upper tobacco leaves was significantly higher than that of middle and lower tobacco leaves (P<0.01), and potassium content was significantly lower than that of middle and lower tobacco leaves (P<0.05). 3) The main aroma of Lijiang KRK26 middle leaves was hay and sweet incence with the characteristic aroma of burnt-sweet incence, the quality was good and the quantity was enough with good penetration.good penetration.

ConclusionThe quality of KRK26 flue-cured tobacco leaves in Lijiang tobacco area was generally better, the production was slightly higher than that from the origin of Zimbabwes and the chemical composition was coordination. The average temperature of mature period and precipitation of rooting stage had the greatest influence on the quality characteristics of KRK26 fume. The fresh sweet incence showed an increasing trend with increasing planting years, overall uphold the “sweet and mellow” style characteristics of Yunnan flue-cured tobacco leaf.