To apply high-quality organic fertilizer, crop straw and livestock manure are the top raw materials for retting organic fertilizer. After the crop straw is crushed, add the Quick Decay agent, stack it, and seal the surface with mud to keep the fermentation temperature at 25 ℃ ~ 45 ℃. Generally, it can be retted into fertilizer in about 25 days. It can also be composted and fermented with EM raw dew in advance. For each cubic meter of manure, 1kg of EM raw dew plus 0.5kg brown sugar mixed with 20kg of water are used. After mixing, it is allowed to stand for 30 minutes, and then sprayed in semi dry manure. After turning the pile, it is wrapped with agricultural film for strict fermentation, and the temperature should not exceed 45 ℃. 16-20 cubic meters of fully decomposed organic fertilizer can be deeply applied to vegetables in each mu of solar greenhouse, which can be applied in two times (2 / 3 for the first time and 1 / 3 for the second time), and watered once after application. For vegetable fields with more than 3 years, when the soil pH value is less than 6, apply 80kg lime powder twice per mu to water and neutralize the soil; When the soil pH value is greater than 7, 50kg gypsum powder shall be applied twice per mu to water and neutralize the soil.
To increase the application of micro fertilizer, the application of micro fertilizer to vegetables can make vegetables high-quality and high-yield, but the application amount of micro fertilizer should be appropriate. Excessive application amount will do harm to vegetables. The amount of acid micro fertilizer such as ferrous sulfate per mu shall not exceed 3.5kg, and the amount of manganese sulfate per mu shall not exceed 2kg; The amount of alkaline micro fertilizer such as copper sulfate per mu shall not exceed 2kg, borax per mu shall not exceed 1.25Kg, and zinc sulfate per mu shall not exceed 1.25Kg; Neutral micro fertilizer such as magnesium sulfate can be applied by 0.5kg per mu.
Fertilizer ammonium nitrate and other nitrate nitrogen fertilizers should be used with caution. Generally, they should not be applied to vegetables. Foliage vegetables should not be sprayed with nitrogen fertilizer. Ammonium chloride, potassium chloride and other chlorinated fertilizers should not be applied to tomato, potato, carrot, white radish, sweet potato, yam, bulb fennel, etc.