[**Shaanxi Provincial People** Department].
On December 25, the reporter learned from the Provincial Department of Agriculture and Rural Affairs: Recently, the north of our country ushered in a large area of snowfall and extremely cold weather, among them, the temperature in Yulin and Yan'an and other places in our province reached minus 30, exceeding the coldest temperature in ordinary years, and the facility vegetable industry is facing a severe test. The Provincial Department of Agriculture and Rural Affairs requires all relevant departments to take key technical measures to ensure that greenhouse vegetables safely survive extreme cold weather.
Make multiple layers of coverage. In the face of severe cold, the current insulation technology adopted by our province is internal covering and external covering, and the effective insulation measures commonly used in production are multi-layer covering. In the current extremely cold weather, plastic film can be added to the greenhouse and cold film can be covered outside the greenhouse.
Perform emergency warming. At present, the commonly used heating measures in greenhouses mainly include biomass fermentation, air source heat pump technology, electric heating, diesel heating, gas hot blast stove, heating block heating, biomass boiler, etc., in principle, air source heat pump technology, electric heating, diesel heating, oil and gas hot blast stove, heating block heating, biomass boiler can be used as emergency heating methods.
Carry out scientific management. Even in cloudy weather or rainy and snowy weather, the insulation quilt should adhere to the principle of "can be revealed", and the greenhouse crops should also receive scattered light in rainy weather, so that the greenhouse is heated by light and accumulates heatIn case of heavy snow, when the outdoor temperature is not very low at night, the insulation quilt can be uncovered to prevent the insulation from being wet and freezingIn the case of continuous rainy days and sudden sunny days, greenhouse crops should avoid direct sunlight, gradually uncover, and see the light in a timely and moderate manner to prevent excessive transpiration from causing damage to cropsRemove the snow on the greenhouse in time, and dry the insulation quilt in time when the rain and snow are sunny, and try to keep the insulation quilt dry. (Reporter: Wu Shasha).
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