Effect Of Different Zn Application Ways On Growth And Quality Of Flue-cured Tobacco

Flue-cured tobacco quality is influenced by multiple factors, mineral elements is one of the important link. This experiment as the starting point from the spraying period, to researching on zinc effects on the flue-cured tobacco growth and quality of production.Liangyan2,And combining with the characteristics of different growth period of flue-cured tobacco, making the spraying period to be the starting point,choose the different combination of spraying period from the resettling stage、 fast-growing stage、after multi-topping. Research of trace element zinc effects on the flue-cured tobacco growth and quality of production. The results showed that:(1) Zinc on flue-cured tobacco growth and development plays an important role. Spraying0.2%of zinc of flue-cured tobacco growth situation is better than control treatment,spraying0.2%zinc is the most advantageous for plant height,leaf length,leaf width,stem circumference on the resettling stage、fast-growing stage、after multi-topping three times. Spraying0.2%of zinc on fast-growing stage、after multi-topping two times is most conducive to the accumulation of dry matter, and let the earth material distribution is greater than the underground part.(2) Zinc has important influence on roast tobacco leaf chemical components.Spraying0.2%zinc can let the synthesis of carbohy drate material under a certain degree of inhibition in high sugar content of flue-cured tobacco areas.In multi-topping after spraying0.2%zinc can make chemical composition content is the most harmonious.(3) Zinc has a great influence on the economic value of the tobacco leaf.Spraying0.2%zinc on fast-growing stage、after multi-topping can make its economic value to achieve the best,in the resettling stage、fast-growing stage、after multi-topping three times use will be caused by excessive zinc production.