In March, Yangchun manages greenhouses to focus on soil, fertilizer and water

    In the spring of March, the greenhouses recovered. At this time, with the gradual increase in temperature, greenhouse management has also entered an important period. As we all know, greenhouse crops grow under the protection of greenhouse film and rely more on "soil, fertilizer and water". It is an important guarantee for the healthy growth of greenhouse crops.

Strictly control acid and alkali soil to prevent soil "discoloration:

    1. The amendments selected should not increase soil nutrients as much as possible, and can adjust the soil acid-base balance.

    2. More organic substances are used. Through the chelation of organic substances, the mobility of soil salt ions is increased, the concentration of soil salt ions is reduced, and the discoloration of soil surface is solved from the source.

    3. The base fertilizer must be combined with the application of organic fertilizer, preferably bio-organic fertilizer or bacterial fertilizer. Be sure to know what the raw materials of organic fertilizer are, such as animal and plant carcass organic fertilizer, manure organic fertilizer, and straw waste organic fertilizer.

    Spring greenhouse crops have different requirements for chemical fertilizers, and different vegetable fertilization methods are also different. When fertilizing, we must first determine the characteristics of the soil and then fertilize, so as to reasonably determine the nutrients required by vegetables.

    Implement formula fertilization According to the characteristics of different vegetables and soil fertilizer supply conditions, determine the appropriate amount of nitrogen, phosphorus, potassium and trace elements and the corresponding fertilization technology.

    Application of ecological organic fertilizer The organic matter content of ecological organic fertilizer can reach 45%, which can play the role of nitrogen fixation, phosphorus solution, potassium solution to vegetables, and can also decompose the residual substances of pesticides and chemical fertilizers. It can be fermented and matured in 5 to 6 days in spring, summer and autumn, and it takes 7 to 10 days to mature in winter. Generally, for 1 to 3 days, the temperature in the heap rises to 80°C, which can kill Escherichia coli and eggs.

    Reasonable watering of shed vegetables is an important measure to increase yield. The watering of vegetables in the greenhouse depends on the sky, the ground, and the actual situation, so as to ensure the high yield and harvest of vegetables in the greenhouse.

    First, the watering should not be too large. At low temperatures, the water demand will be reduced accordingly, the watering amount should be small, and the interval can be appropriately longer. Avoid flooding with large amounts of water, so as to avoid low temperature and high humidity leading to vegetable root retting.

Second, the time should be appropriate. The watering of greenhouse vegetables in spring should be arranged around noon, after 10 am and before 3 pm. At this time, the temperature of the shed is higher, and the side effects after watering are minimal. Try to avoid watering in the morning and evening. To prevent freezing of vegetables.

    Third, according to the weather conditions, water more appropriately on sunny days, less or no watering on cloudy days, and avoid watering on windy and rainy days to ensure that the greenhouse is at a normal room temperature.

   Fourth, watering should be focused. The amount of soil water evaporation in the southern part of the greenhouse is large, and the amount of watering can be appropriately larger; the temperature on the east and west sides of the greenhouse and the northern part are lower, and the sunshine time is short, and the amount of watering should be appropriately less.