Welsh onion is a kind of fat vegetables. For a long time, many vegetable farmers are accustomed to open the trenches for the one-time dressing of green onions. This is unscientific. Because it is not only easy to cut off the roots of green onions, but also due to over-concentration of fertilization and burn young roots of green onions, resulting in the phenomenon of dry tip and dead leaves, affect the quality of green onions, reduce production, so open the trenches to ensure No way.
The correct fertilization method should follow the principle of “eat less and more meals†and adopt the method of soil fertility, from scallion planting to harvesting for 3 to 4 times, to prevent deferment of late growth of green onions. Apply 30 yuan compound fertilizer per acre, 20-30 kg, or 10-15 kg of urea and potassium sulfate; Apply on the surface of the green onion roots, and then cover the soil fertilizer, reduce the loss of fertilizer volatilization, promote softening and elongation of light blue, enhance wind resistance. Two days after fertilization, water must be poured to dissolve the fertilizer in the soil and quickly decompose, promoting the growth and development of Welsh onion.
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Greenhouse Wet Pad For Cooling System
"Wet curtain - fan" of the vertical ventilation cooling combination is the most economical and effective measures to cool the greenhouse in summer.
Years from the application of a real show, even in the heat of the day reported, the rational design and installation of a fan of wet curtain cooling system can still control the greenhouse temperature at 30 °C, in order to heat the greenhouse to reduce the adverse effects minimum. In the summer, your production needs Jienuo wet curtain to help.
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