Effects Of Different Formulae Of Nitrogen Froms On The Quality Of Flue-Cured Tobacco

In order to make the Jilin Yanbian characteristic leaf tobacco, further inquired into that under the Yanbian ecology region the different nitrogen forms matches executes to the flue-cured tobacco physiology characteristic and the intrinsic quality influence, make use of the main cultivation cultivars the flue-cured tobacco variety JiYan 9) as a material, experimental processing by executed the nitrogen, the phosphorus, the potassium (1:1.5:3) under the normal level carries on, has established five different nitrogen forms allocated proportion level (NH4+-N:NO3--N), carries on the field experiment.the result indicated:In the agronomic characters, each treatment along with transplants the number of days to increase increases, treatment C (50%:50%) various agronomic characters surpass other each processing, followed by treatment D; Accumulation in the dry matter treatment C (50%:50%) accumulates fastest in the different birth time process; In the physiological characteristic aspect, ammonium nitrogen and nitrate nitrogen matches processing which have the high photosynthesis speed, the transpiration rate, blowhole leading, the chlorophyll content, protective enzymes, Inverting enzyme and nitrate reductase, surpasses sole nitrogen form processing obviously, and treatment C (50%:50%) displays superiorly; On the chemical composition, each processing total sugar, reducing sugar content is high, only then treatment C (50%:50%) value of the phase is relatively low, moreover, in shimuke value, reducing sugar/nicotine, ratios and so on potassium/chlorine and total nitrogen/nicotine, treatment C (50%:50%) performance best; In the tension stress, the tensile strength, the vane thickness, physical properties and so on packing value, treatment C (50%:50%) displays superiorly, synthesizes each physical character performance, various characters performance relatively good processing has treatment C(50%:50%) and treatment D; In the economic character, treatment c(50%:50%), each target surpasses other processing; In the neutral fragrance material total quantity, carotenoid total quantity, neophytadiene total quantity, treatment C(50%:50%) content highest。Result indicated that under certain production condition better tobacco leaf output and output value need suitable ammonia niter allocated proportion, rather than all executes ammoniacal nitrogen, the different nitrogen source allocated proportion applies fertilizer surpasses the sole nitrogen source processing, When the ratio is 50%:50%,the value is highest, It shows that the appropriate ratio of ammonia nitre can enhance resistance of plant,and promote the carbon-nitrogen metabolism of plant.