The shed vegetables into the winter fertilization to see

Vegetables grown in greenhouses have artificially created warming and heat preservation conditions, avoided catastrophic climate, accelerated the growth process, and enabled early ripening and high yielding of vegetables. However, due to the accelerated production cycle of vegetables, the amount of fertilizer needed is larger than that of open-air vegetables, which is 50% higher than the normal amount. It is precisely because of the increase in the amount of injection, such as improper control, it will bring about some negative effects, especially in winter, pay attention to reasonable fertilization.

Regulating basal fertilizer in order to prevent one-time cast manure too much, should be enough to apply base fertilizer, appropriate top dressing. General basal fertilizer should account for 60% of the total amount of fertilizer, of which phosphate fertilizer can be increased to 70% due to slow decomposition, while high-quality farmyard manure and manure should not exceed 5,000 kg per mu.

The addition of organic manure organic fertilizer can increase the soil's ability to retain water and fertility, and can also adjust the pH of the balanced soil, as well as prevent the soil from being contaminated by concentrated fertilizer supply.

It is forbidden to grow vegetables in greenhouses in light greenhouses due to better sealing performance. Applying fertilizers or spreading fertilizers in shallow layers can easily make volatile fertilizers harm vegetables. Therefore, the top dressing must be applied or applied in a depth of 5 to 6 cm. In addition, the distance between the root and the vegetable should be maintained at a distance of 8 to 10 cm.

The nitrogen topdressing nitrogen fertilizer, especially urea and ammonium bicarbonate, can only be absorbed by vegetables after transformation, and the speed of conversion depends on the temperature in the shed. When the temperature in the greenhouse is lower than 15°C, the bacteria required for transformation will be inhibited. Therefore, topdressing nitrogen fertilizer should be carried out before and after noon on sunny days, too early and late will reduce the effect of top dressing due to low temperature. In addition, topdressing nitrogen fertilizer in the greenhouse, the best use of 0.5% to 1% concentration of urea solution at 15 °C above the root dressing. Http://Content/d3093b1a-2952-462a-bc04-023cfe6f24cd?cType=2

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