Recently, many places in China have ushered in more frequent snowfall. Heavy snowfall has a double impact on crops and vegetables. While promoting the increase of wheat, it will also have adverse effects if the snow in the greenhouse is not removed in time. Relevant experts from the Municipal Agriculture Bureau reminded growers to remove snow from greenhouses and do antifreeze work.
Experts pointed out that snow can play a role in anti-freezing and warming, increasing fertilizer fields and killing insects. The new snow is loose and porous, and the crops are like covered with quilts, which can prevent the heat in the soil from being radiated outwards and prevent the intrusion of cold air from the outside. As the snow in the area slowly melts when the temperature warms up, most of the snow water infiltration into the soil means that it has been once again irrigated, which is good for relieving spring drought and doing spring planting. The melted snow water can bring more nitrogen to the soil, thus increasing the soil fertility.
Under snow cover, the soil freezes to a shallow depth, and leaves, grass roots, etc. can rot and turn into fertilizer. In addition, winter snow can also freeze the eggs of wintering pests such as aphids and mites, inhibit the spread of diseases, and reduce the probability of occurrence of pests and diseases in spring. But at the same time, snowfall can cause premature germination of wheat weeds. In short, there are more snowfalls in winter and this spring, which is very beneficial to the growth of wheat. It is hoped that the majority of farmers will carry out the work of rowing, fertilization, chemical control and weed control in wheat fields in the early spring after the festival, and strive for a good harvest of wheat.
At present, some greenhouse vegetables are in the fruiting stage. After the rain and snow, there will be strong winds and cool weather, which is not conducive to ventilation and ventilation. It is easy to cause insufficient light in the shed, temperature drop and humidity, which may lead to some diseases. Therefore, experts remind the greenhouse growers to remove the snow on the greenhouse in time after stopping the snow, to prevent the pressure on the greenhouse and reduce the heat preservation effect due to the melting of the snow water to wet the grass scorpion; for some spans, the pillars are small, The shed with poor skeleton robustness should increase the column in time.
It is necessary to take active measures to increase temperature and heat insulation, promptly check and repair the damaged shed film and dry it to cover the outside. A small arch shed is added in the facility, the ground is covered with straw and straw, and the grass shed is added to the foot of the greenhouse and the greenhouse. If conditions permit, the furnace can be temporarily added. Fire, electric heating equipment, etc. are used for warming; when the wind is cool, the grass cover is covered early. It is necessary to strengthen management and promote the recovery of vegetables as soon as possible.
After the snow stops, you should use the method of pulling the shackles. Do not rush all the scorpions to prevent the strong light from "flashing seedlings". After the weather is warm and warm, according to the growth of the vegetables, the foliar fertilizer should be properly applied to promote the plant to resume growth. To enhance the ability to resist cold; properly control the watering, do need to water, should use drip irrigation, under-film dark irrigation and other measures, watering should be small; try to release air in the short-term at noon, reduce the humidity inside the shed, prevent disease occurrence; Tobacco and dust medicines should be used for pest control.
This article URL: Snowfall brings double impact to crops. Experts remind growers to remove snow and freeze.
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