Nutrient solution for preventing corn stalk rot disease

The invention provides a nutrient solution for preventing a corn stalk rot disease. Each liter of the nutrient solution is prepared from the following components: 60 to 70 g of urea, 15 to 20 g of ammonium dihydrogen phosphate, 15 to 25 g of potassium sulfate, 5 to 8 g of potassium nitrate, 1 to 3 g of magnesium sulfate, 4 to 6 mg of zinc sulfate, 18 to 25 g of radix saposhnikoviae and spica prunellae water extract and the balance of deionized water, wherein the radix saposhnikoviae and spica prunellae water extract is obtained by mixing radix saposhnikoviae and spica prunellae in equal mass, adding water of which the weight is 3 to 5 times of that of a mixture of the radix saposhnikoviae and the spica prunellae, decocting for 35 to 45 minutes on slow fire and decocting for twice. According to the nutrient solution provided by the invention, reasonable fertilizer can be provided for corns, the disease resistance of the corns is increased after the nutrient solution is applied, the corn stalk rot disease can b