Because traditional fertilizer, in the tobacco hole plate grows seedlings in the process to have Yi Shaomiao, high disappearing, to apply fertilizer many times and so on questions, this experiment take blank processing as well as the employment ordinary compound fat as the comparison, in the tobacco direct seeding grows seedlings in the process to employ controls differently releases the time and the different employment quantity controls releases compound fat, and to the smoke seedling's germination percentage, high, the stem thick, the dry wet weight, the chlorophyll content and so on main physiological growth target has conducted the research, is for the purpose of exploring controls releases compound fat, in the tobacco direct seeding grows seedlings the application effect, fertilizer being suitable to control releases the time, the suitable amount used. Discovered through the experiment: The employment controlled releases replaces ordinary fat compound carries on the flue-cured tobacco to grow seedlings fat the production to simplify the smoke seedling topdressing link, the labor saving reduced effort, to reduce the growing seedlings cost, because has prevented the smoke seedling ataxia phenomenon which effectively the topdressing caused non-uniform, enhanced the smoke seedling degree of uniformity and grows seedlings the quality; Achieved reduced the fertilizer in the production to lose, the protection ecological environment as well as the release and the absorption synchronization goal. the topical glossary (according to arranged in order) the tobacco hole plate direct seeding has grown seedlings (tabacco plug seedling) to burn the seedling, wilting (wilting) blank processing (blank test) controls releases compound fat (controlled-release fertilizer) ordinary compound fat (common compound fertilizers) the germination percentage (Seeding Emergencerate), high (Shoot height), stem thick (Stem diameter), dry weight (dry weight), leaf area (Leaf area), wet weight (humid weight), strong sprout index (Sound Seedling Index) chlorophyll content (Chlorophyll content) physiology growth target(physiological index and growth target) controls releases the employment quantity which the time (controlled-release time) is suitable (optimum dosage) the topdressing (refertilize) the labor saving (laborsaving) the growing seedlings cost (seedling cost) the degree of uniformity (uniformity)