AbstractFertilizers as a result of the traditional plug of tobacco seedlings in the course of the existence of burnability Miao, high loss, fertilizer and other issues to be repeated, the experiment in order to deal with as well as the use of ordinary blank as a control compound, live in tobacco seedlings of different controlled-release application process time and different application amount of the controlled-release fertilizer, and seedling germination rate, plant height, stem diameter, dry weight, chlorophyll content and other key physiological indicators of growth have been studied to explore the controlled-release fertilizer live in tobacco seedlings Application effects of controlled-release fertilizer suitable period, the appropriate dosage.Found by experiment: application of controlled-release fertilizer to replace the ordinary compound reduced the production of flue-cured tobacco seedling nursery topdressing links, saving labor, reducing breeding costs, to effectively prevent non-uniform because of top-dressing phenomenon caused by irregular seedling and improve seedling uniformity and seedling quality; to achieve reduction in the production of fertilizer loss, protect the ecological environment as well as the release and absorption of the purpose of synchronization.Professional vocabulary (by order)Plug tobacco seedlings live (tabacco plug seedling)Miller burning, wilting (wilting)Handle blank (blank test)Controlled-release fertilizer (controlled-release fertilizer)General compound fertilizer (common compound fertilizers)Germination rate (Seeding Emergencerate), plant height (Shoot height), � diameter (Stem diameter), dry weight (dry weight), leaf area (Leaf area), wet (humid weight), seedling index (Sound Seedling Index )Chlorophyll content (Chlorophyll content)Physical growth indicators (physiological index and growth target)Release time (controlled-release time)The most appropriate application rate (optimum dosage)Topdressing (refertilize)Labor (laborsaving)Seedling cost (seedling cost)Uniformity (uniformity)