Study On The Suitable Nitrogen Forms And Fertilizing Rate In Baoshan Tobacco Growing Area

Baoshan is a new developing tobacco growing area, which is located in the southwest border of China. Over the years,"tobacco cultivation" general teaching material data has been used as the reference in Baoshan tobacco production. With the base unit construction of tobacco industrial company, higher quality tobacco leaves are required by tobacco industrial company. In order to guide the tobacco production better than before, to establish a more feasible fertilizing technique in tobacco production is of great significance. In order to find out the effect of different nitrogen form ratio (base fertilizer and topdressing fertilizer) on yield and quality of flue-cured tobacco in Baoshan tobacco growing area in Yunnan Province, field plot method was adopted. According to the different proportions of the nitrogen forms (the nitrate nitrogen and ammonia nitrogen) in the basic fertilizer and the topdressing, six different treatments were designed to research the effect on agronomic characters, economic characters and the quality of flue-cured tobacco. The results showed that T3(base fertilizer.nitrate nitrogen40%+ammonium nitrogen60%, topdressing fertilizer:nitrate nitrogen fertilizer60%+ammonia nitrogen40%) and T4(base fertilizer nitrate nitrogen60%+ammonia nitrogen40%, topdressing fertilizer:nitrate nitrogen fertilizer40%+ammonium nitrogen60%)were benefit to the absorption of mineral nutrition elements and the accumulation of the dry matter in flue-cured tobacco, which intrinsic chemical components were harmonious. In general, T3and T4treatments were conducive to the improvement of the yields and quality of flue-cured tobacco. In different nitrogen dosage experiment, T2(90kg nitrogen) treatment tobacco leaf reached the ideal effect in production, output, tobacco quality after baking. From the overall, T2treatment can better guide the Baoshan tobacco production.