Roller shutter vegetable anti-"flashing seedlings"

In winter, many greenhouses are equipped with shutters. How do you prevent the occurrence of flash seedlings in a greenhouse using a roller shutter machine?

One, repeatedly pulled straw

When the sky suddenly clears after continuous rain and snow, pull the grass curtain up for 5 minutes and then let it fall. After 5 minutes, pull it up again. Repeat this for a long period of time to allow a small amount of light to enter. Generally, 3 to 5 pulls are performed. The vegetables in the shed will adapt to the suddenly changed environment. The leaves of the plants will stretch normally, and natural wilting will no longer occur. If symptoms of mild wilting are found, spray warm water can be used to increase soil moisture and reduce leaf water evaporation, thus alleviating sprouting.

Second, part of the drafting draft

When it suddenly turns cloudy after continuous rain and snow weather, first lift the grass curtains covered by the sheds by 1/3 or 1/4. Do not pull up all the straws, so that all the seedlings are exposed to sunlight. After a period of time, gradually pull the straw up again, and no sprouting will occur.

Third, draw drafting ahead of time

If the temperature outside the shed is not very low, drafting curtains can be drawn early. Requires careful observation of weather changes. If it is found that the weather is going to be sunny and the temperature outside the shed is not very low, the straw can be pulled up before the sun shows up, so that the drafting curtain is pulled out after the sun comes out and vegetables sprout. The probability is much smaller.

Fourth, shade with a net

After drafting the curtain, drawing shade nets for more than 10 minutes can effectively prevent the emergence of vegetables flashing due to the drafting of the curtain.

V. Spray liquid fertilizer recovery

When the above measures are taken and the flash seedlings are still heavy, they can be sprayed with Tianda 2116 or sea pheromone, green blood venous liquid fertilizer, etc. to supplement the water and nutrients, increase the vitality of the vegetables, and promote their growth.

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