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Spring gale weather is frequent and slight carelessness may cause the film of the greenhouse to be torn and grasshoppers to be scraped. Here, special peasants and friends are reminded that we must pay attention to wind damage in the spring.
First, we must pay attention to listening to and watching radio and television weather forecast programs. Whether or not there will be windy weather in the recent days is well known and prevention is ahead of schedule.
Second, we must pay attention to regular inspections of greenhouses to eliminate wind hazards. One is to inspect the lamination lines and re-tighten the loose lamination lines; the older or broken laminating lines should be replaced promptly. The second is to check if the film is damaged. If it is found damaged, it should be repaired as soon as possible.
Third, it is necessary to focus on fixing the slope grasshoppers in the greenhouse. During the production, when the farmers stopped laying grasshoppers, they always worried that the grasshoppers were blown by the wind, so they chose to use floating membranes to cover the grasshoppers. However, the floating membranes covered about 4/5 of the total grasshoppers. That is to say, the grasshoppers on the slopes behind the greenhouses are covered incompletely by the floating membranes. Therefore, on the basis of covering the floating membranes, it is necessary to fix the grasshoppers on the back slope of the greenhouse. Method: Pick a No. 6 steel wire, pull it in the back shed 20 centimeters in the back slope, and both sides are fixed on the falling stone below the east-west gable, and then tighten with a tight threader. Or every 10 meters on the back slope of the greenhouse, press the fixed steel bar with stones to prevent the steel bar from becoming loose and the grasshopper is blown away by the wind.
Fourth, we must set up a greenhouse shelter "window cover." The so-called windproof rear cover is a piece of membrane with the same length as the floating membrane and a width of about 1m at the back slope of the greenhouse. It is set at the top of the greenhouse by the length of the east and west, and covers one side of the greenhouse film (about 20 cm in width). Compaction. After putting down the grasshopper and covering the floating membrane, cover the floating membrane with this membrane to prevent the north wind from blowing into the floating membrane and avoid damaging the floating membrane.
Always pay attention to forgetting antifreeze
Due to the extremely unstable temperature in this season, cold temperatures are often encountered, which cause freeze-damaged vegetables in greenhouses, leading to greater economic losses. In this regard, remind farmers to pay attention to changes in the weather, and do not forget to prevent freezing and cold.
The low-temperature hardening seedlings are treated at low temperature for about 5 days before planting, and the windproofness of the nursery greenhouse is strengthened so that the temperature of the nursery greenhouse is the same as the temperature of the planting greenhouse, or slightly lower than the temperature of the greenhouse.
Look at the weather forecast before planting and planting. Look for the local weather forecast. You should choose to plant on a sunny morning and have at least 3 days of good weather after planting to improve the ground temperature and accelerate seedlings.
Multi-layer covering in a small plastic shed, a small shed, after planting in the planting line to build a layer of small sheds, double protection can effectively prevent the freezing of vegetable seedlings; can also be covered in the plastic film from 10 to 20 cm away from the top membrane in the greenhouse The two-story curtain covers the night; if there are no small arches and two curtains, the mulching film can be laid on the planting line in the evening.
Increase the temperature within 5 days after planting without releasing air, and promote the ground temperature with the temperature, which will help to ease the seedlings.
Ignition and antifreeze keep a close watch on weather changes. At night with frost damage, fumes outside the greenhouse, stacking fire pits every 10 meters in the shed, and igniting around 3:00 a.m., the fire should not be too large, there should be no smoke, and it can serve as a good antifreeze. effect.
Spraying foliar fertilizer after colonization, spraying foliar fertilizer to enhance frost resistance. The use of 0.3% potassium dihydrogen phosphate plus 300 times the white sugar solution, or 1000 times Tianda 2116 liquid spraying the stem and leaves of the plant, can play a role in cold and frost.
Strong bones thermal insulation
When the spring is on, the climate is not exceptionally warm. This time, we must master the correct use of greenhouse insulation to ensure the normal growth of vegetables in the greenhouse. The sun is best at noon, you can roll up the insulation, increase the plant light, but before the sun goes down, cover the greenhouse insulation, so as not to affect the vegetable growth within the greenhouse.
1. When the greenhouse is insulated, the interval between the two beds is not to be less than 10cm. The greenhouse insulation is fixed on the iron bar of the greenhouse by the bottom nylon rope, and then the upper end is firmly on the steel wire. If the roll is biased during the use, it should be Real-time mediation, but also to ensure comprehensive coverage. After the insulation is warmed up, use a nylon rope to hold the insulation together.
2. The insulation of the greenhouse is placed on the back wall of the greenhouse. It should also be firmly in the middle of the wall top. Generally, it must also have a certain slope to the north of the wall. It is then covered with waterproof tarpaulin to facilitate the outward drainage of rainwater. Also prevent soaking.
3, greenhouse insulation is covered by the bottom of the greenhouse, the water should be removed in real time to prevent soaking insulation. When conditions permit, old grass rakes are laid at the junction of the ground and the large-format membrane to prevent the insulation from being touched by the ground.
4. After the greenhouse insulation is covered, use the sandbags to prevent it from being blown by the wind and reduce the insulation effect of the greenhouse insulation.
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