Strong cold air will affect most of China, and agricultural production needs to pay attention to the impact of cold wave
2018-12-01 01:07:19
The Central Meteorological Observatory issued a cold wave blue warning at 6:00 this morning. It is estimated that from 22 to 24, most of Xinjiang, Inner Mongolia, central and western Gansu, northern Qinghai, Ningxia, northwestern Shaanxi, northern North China, etc. will appear 6 to 12 °C. Cooling, in which parts of Xinjiang's southern Xinjiang, western Gansu, Inner Mongolia, central and western regions, etc., can reach a temperature range of 14 to 18 °C; most of the above areas have 4 to 6 northerly winds, of which the winds in Xinjiang's Shankou area can reach From 8 to 10, parts of the southern Xinjiang basin have sand or sandstorms. There will be moderate to heavy rains in the Tianshan area of ​​Xinjiang, and heavy snow will occur in some areas. In addition, there are large areas of heavy snow in the northeastern part of Inner Mongolia and northwestern Heilongjiang.
The strong cold air intensity is large, the impact range is wide, the wind power is large and the temperature is drastically severe. All localities should take effective measures to prevent the impact of wind, rain and snow on roads, railway transportation and facility agriculture. Heating, gas supply and other preparations, the health department needs to strengthen the prevention and control of influenza and other diseases; Xinjiang and other cotton areas must seize the time to grab cotton, the pastoral area should do a good job of livestock wind and cold, and pay attention to the fire prevention work of forest grassland.
At present, there are obvious strong winds and precipitation in Xinjiang
Since the 21st, cold air has begun to affect Xinjiang, and most of Xinjiang has obvious winds, cooling and precipitation. At 08:00 yesterday, there were 10 to 25 millimeters of precipitation along the Tianshan Mountains in Xinjiang (there was sleet or snow on the local area), and the plume was 38 mm (Figure 1). The Tianchi and Zhaosu areas showed significant snowfall. Today 08 The depth of snow in Shizhao is 10 cm; the gusts of 5 to 7 are in most parts of Xinjiang, the local gusts are 8-9, the sands or sandstorms in southern Xinjiang, and the strong sandstorms with visibility less than 100 meters in Minfeng; The temperature in northern Xinjiang decreased by 4-8 °C compared with yesterday's 08, and the local temperature drop reached 9-11 °C.
Figure 1 Xinjiang precipitation real map (October 21, 2010 08:00 to 22:08)
In the future, strong cold air will continue to affect the majority of China's
It is expected that from 22 to 26, strong cold air will affect most of China from west to east. The characteristics of this strong cold air are: strong intensity - the strongest since the fall of this year, the scope of influence is wide - except Tibet, most of China will be affected by it, the wind is large - most areas have 4 to 6 winds, The wind power in the mountain pass area of ​​Xinjiang is 8-10, and the temperature is drastically severe - the temperature drop in most areas is 6-12 °C, and the local temperature drop can reach 14-18 °C. There will be snowfall in some parts of the north, and some areas will reach the cold wave.
Figure 2 National temperature reduction forecast map (October 22, 2010 - 08:00, 08:00)
Cold weather has the greatest impact on agriculture. The cooling caused by cold and cold air can usually exceed the cold tolerance of crops, causing frost damage or freezing damage to crops.
Suggestions for the prevention of cold waves in agricultural production:
1. Because the wind is strong when the cold air comes, the scaffolding facilities should pay attention to reinforcement, prevent the scaffold from collapsing or the wind blows open the shed film to increase the freezing damage, and do a good job of temperature and humidity regulation.
2, rapeseed, green manure and citrus orchards in low-lying areas should pay attention to the clearing of drainage ditch, anti-water accumulation and freezing damage; leafy vegetables can be covered with straw to reduce the freezing hazard.
3, vegetable or flower greenhouse covered with straw mat, double-layer film and other insulation materials to improve the temperature inside the shed.
4, poultry and livestock farmers to do the cold insulation work of poultry sheds, poultry breeding sheds should also increase the light time to increase the egg production rate; aquaculture ponds water and temperature adjustment, and appropriate reduction of the amount of feed.
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