Effects of Nutrient Management on Agronomic Traits of Flue-cured Tobacco and Tomato Spot Wilt Disease
To clarify the impact of nutrient management after tobacco garlic rotation in the Jinsha River Basin of Lijiang City on tobacco agro-nomic traits and the prevalence of tomato spotted wilt virus(TSWV)and thrips.After the rotation of tobacco and garlic,a randomized nutrient management plot experiment was conducted to determine the agronomic traits of tobacco during its growth period,and to investigate the occur-rence of tomato spot wilt and thrips.The results showed that after tobacco garlic rotation,conventional fertilization(T1)increased the plant height,stem circumference,pitch,and maximum leaf width of tobacco at the cluster stage by 61.97%,32.22%,38.31%and 42.21%,respec-tively,compared to the control without nitrogen,phosphorus,and potassium fertilizer(CK);stem girth,pitch,number of leaves,maximum leaf width,and maximum leaf area of the vigorous long-term T1 treatment increased by 14.14%,19.75%,17.05%,14.87%,and 17.17%respectively compared to CK treatment;plant height,maximum leaf width,and leaf area of T1 treatment at maturity were increased by 9.74%,11.34%and 12.03%,respectively,compared to CK treatment;the disease index of T1 and CK treatments during the tobacco cluster stage was 0 and 8,and the peak period was 5 and 14,respectively;the maturity period was 15 and 38,and the disease index of T1 treatment was significantly lower than that of CK treatment.The incidence rate,disease index and the cumulative number of thrips per hundred plants of tomato leaf spot wilt increased with the time of investigation.Reasonable fertilization after tobacco garlic rotation can improve the agronomic traits of tobacco leaves,reduce the disease index and harm degree of tomato spot wilt,and provide reference basis for improving tobacco planting soil and reducing continuous cropping obstacles.
国家科技期刊平台
NSTL
万方数据
维普
