Winter and spring shed vegetables fertilize the "smart"

Recently, the reporter interviewed Yang Zhen, an associate professor at the College of Horticulture, Northwest Sci-Tech University of Agriculture and Forestry, overtime. He said that winter and spring vegetables must be “skillfully” fertilized so that they can do more with less.

Cleverly using ammonium sulfate as top dressing, ammonium sulfate can be used as top dressing in winter, and the fertilizer effect is fast and not easy to cause fertilizer damage. Each application of 20-30 kg of ammonium sulfate per acre is appropriate. 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 as a base fertilizer, the nutrients are comprehensive, the fertility is long-lasting, and the fertilizer effect is fast; using it as a top dressing has a fast and effective fertilizer effect. 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.

The clever application of air-fat leafy vegetables is better for the application of carbon dioxide at the early stage of growth. Fruits and vegetables should be applied from the initial flowering stage. Generally, the carbon dioxide topdressing is performed at 9-11 am 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 shed reaches 1000 mg/kg. Do not ventilate the topdressing carbon dioxide and apply proper ventilation for 1.5-2 hours.

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