Apply early base fertilizer. In winter and spring, greenhouse vegetable production should be advanced to the ground in late September. Spread 5000 kg of cooked organic fertilizer per acre, then plunge 30 cm deep and mix manure and soil.
Qiao Shi set fertilizer. From late October to mid-November, when planting fruit and vegetables, a 15-20 cm deep ditch is applied to diammonium phosphate and urea in every two colonization ridges. Apply 30 kg of ammonium phosphate per acre, and 15-20 kg of urea. At the same time, fill the bottom with water and then bury the ditch. When planting seedlings, a small amount of diammonium phosphate is applied between every two seedlings, which is about 40 kg per mu.
Cleverly using ammonium sulfate as top dressing. Winter dressing, using urea, due to low soil temperature, urea nutrient decomposition is slow, so play a slow fertilizer effect; the use of ammonium bicarbonate, although the fertilizer effect is fast, but in the confined environment of greenhouse ammonia volatilization ammonia easily produce fertilizer. Ammonium sulfate can overcome the disadvantages of the above two fertilizers. Therefore, it is advisable to apply topdressing fertilizer in the winter with 20-30 kg of ammonium sulfate per acre. The fertilizer should be dissolved in water beforehand, and the fertilizer solution should be flushed with water. Usually every other time the water, pouring a fertilizer.
Using bio-organic and inorganic compound fertilizers. Use it as a base fertilizer, nutrient comprehensive, long-lasting fertility, play a rapid fertilizer effect; use it as a top dressing, fertilizer effect is fast, a significant effect, is an ideal vegetable compound fertilizer. Use 120 kg per acre as the base fertilizer, spread or apply when the vegetables are planted; use 40 kg per acre as top dressing, apply a shallow ditch, and then fill with water after burying the soil.
Skillfully applying gas fertilizer. The production of vegetables in greenhouses is basically in a closed condition. The carbon dioxide content in the shed is low, and photosynthesis is inhibited. Therefore, carbon dioxide must be added. Tests have shown that cucumbers can increase production of carbon dioxide by more than 35%. Leaf vegetables are better to use carbon dioxide in the early growth period, and fruits and vegetables should be applied from the initial flowering stage. Generally, the carbon dioxide fertilizer is applied at 9 to 11 o'clock in the morning on sunny days, and ammonium bicarbonate + sulfuric acid, or baking soda + sulfuric acid can be used to produce carbon dioxide after mixing, so that the carbon dioxide content in the greenhouse can reach 1,000 mg/kg. Do not ventilate the carbon dioxide when it is applied, and ventilate it after 1.5 to 2 hours of application. If the application of solid carbon dioxide gas fertilizer, per acre need to apply 40 kilograms, can be directly applied or buried on the surface, valid for up to 45 days.
Xi'an Natural-Field Bio-technique Co., Ltd is a technology-driven enterprise, who dedicates to the research, production and selling of health-care raw material, cosmetic ingredients and plant extract. Over the years, our company positions at producing high quality, fine technique, cutting-edge products, adheres to the concepts of asset-light, high technology and team work principle, with scientific management methods and strict products standards, making great progress in the health-care field.
Hot Selling powder,Hot Selling extract,Hot Selling Cosmetic ingredients,Hot Selling extract, Hot Selling health care ingredients
Xi'an Natural Field Bio-Technique Co., Ltd. , https://www.naturalfty.com