The invention discloses a mixed seeding
green manure dressing method for a tobacco field. According to the method in the invention, mixed seeding is carried out on ryegrass and
Chinese trumpet creeper in an equal ratio from the first ten days of September to the first ten days of October, wherein the seeding amounts of the ryegrass and
Chinese trumpet creeper are 1.5-2.0kg / mu respectively, basic
seedling amount is 70000-100000 plants / mu, 1500-2000kg of fresh samples are turned over and buried in per mu of soil with the depth of 10-20cm at the time of 40-45 days before
flue-cured tobacco
transplanting, and the pure
nitrogen applying amount is reduced by 1.8-2.4kg / mu when tobacco seedlings are transplanted. The method comprises soaking seeds, seeding,
fertilizer water management, turning over and burying and
fertilizer application when the tobacco seedlings are transplanted. By using the method, the problems that when the
fertilizer is singly applied for a long term, the carbon-
nitrogen ratio in the tobacco field is reduced,
nutrient is not balanced, effective fertilizer supplying capacity is weak, and the chemical components of tobacco leaves are inconsonant are solved. The method has the advantages that quick-action
nutrient content,
total bacterial count and nitrobacteria and actinomycetes quantities in current-season tobacco
transplanting soil are obviously increased, the
nutrient of the tobacco plants is
consonant, the
potassium-increasing base-reducing effect of the
tobacco leaf is obvious,
aroma quality is improved, and the benefit of tobacco planting is greatly improved. The method has good popularization value in the aspect of modifying the long-term
continuous cropping tobacco field.