"Five key" to prevent aging of greenhouse soil

March 22, 2020

Advocating scientific fertilization

 

The fertilization amount was scientifically calculated according to the growth characteristics of different types of vegetables, the fertilizer requirement, the soil fertilization status, and the type and nutrient content of the fertilizer. It is necessary to vigorously promote the formula fertilization technology and soil testing and fertilization techniques for greenhouse vegetables. Adopt scientific fertilization method and adhere to the combination of base fertilizer and top dressing. The base fertilizer should be based on decomposed organic fertilizer, combined with phosphorus and potassium fertilizer; the top dressing should be topdressed according to the different growth stages of the vegetables and the amount of fertilizer required, paying attention to the peak period of product organ formation, such as rhizome, tuber expansion period, knot During the ball period and flowering, the fertilizer is applied again. The base fertilizer should be applied deep, layered or ditch. Topdressing should be carried out in conjunction with watering. Promote foliar fertilization technology.

 

Scientific use of fertilizer

 

Strictly control the amount of fertilizer, especially to reduce the amount of nitrogen fertilizer. Eliminate blind fertilization and partial application of nitrogen fertilizer. The choice of fertilizer should not only consider the nutrient content, but also the use of impurities, especially heavy metals and fertilizers with low toxic content and high purity. It is also necessary to use fertilizers that do not acidify the soil according to the soil conditions. Pay attention to the use of trace element fertilizers, and promote nitrogen, phosphorus and potassium compound fertilizers and organic and inorganic compound fertilizers.

 

Promote the application of organic fertilizer

 

Organic fertilizer not only has full nutrients, long-lasting and stable fertilizer effect, large cushioning, and is rich in organic matter, which can improve soil structure and has less pollution to greenhouse soil environment. It is necessary to vigorously promote the use of organic fertilizers, and it is necessary to use fertilized fertilizers such as high-quality livestock and poultry that are fully decomposed and processed by accumulation and fermentation. It is necessary to promote the technology of straw returning to the field and the green manure technology of greenhouse vegetable cultivation according to local conditions, which can increase the fertilizer source and improve the soil.

 

Cultivate and improve soil fertility

 

Take comprehensive management measures, such as scientific water and drought rotation, vegetable grain, melon and vegetable rotation; increase organic fertilizer; establish standardized greenhouse vegetables, strengthen farmland water conservancy construction, and reduce groundwater level.

 

Reduce toxic substances and contaminate shed vegetables

 

It is strictly forbidden to use garbage and sewage irrigation. In fields with high cadmium content, it can be rotated with rice, applying lime or calcium, magnesium and potassium fertilizer. Silicon and calcium fertilizer can increase soil pH .

 

Source: Inner Mongolia Agriculture and Animal Husbandry Information Network

 

 

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