It is expected that there will be a medium-intensity cold air affecting China's North China and Northeast China from September 27 to 28.
North China Huanghuai winds will further delay crop maturity
Affected by cold air, the temperature in the southern part of Northeast China, North China, Huanghuai and other places will drop by 4-8 °C. There will be frost in eastern Inner Mongolia, northwestern Heilongjiang, northwestern Hebei, northern mountainous areas of Beijing, and parts of northwestern Shanxi; most of the northern part of the Huaihe River There are 4 to 6 northerly winds in the area, and the gust winds can reach 7 to 8 levels. The Bohai Sea and the Yellow Sea have 6 to 8 northerly winds.
At present, some crops in North China and Huanghuai are late in development, and cooling will reduce the rate of crop filling, further delaying the process of crop maturation, which is not conducive to the normal maturity of crops and timely vacillation in winter wheat areas; strong winds will have an impact on weak greenhouses. Around the 29th, early frost will appear in parts of the northwestern part of the mountain and northern part of Hebei. The crops in most of the above areas have matured, and frost has little effect on grain production.
Strong rainfall in Northeast China is not good for crop filling and autumn harvest
From the 27th to the 29th, there were moderate to heavy rains and local heavy rains in parts of the southern part of Inner Mongolia, Liaoning, central and eastern Jilin, and central and eastern Heilongjiang. The cumulative rainfall in most of the above areas can reach 15-40 mm, including 50-70 mm in the south-south of eastern Inner Mongolia, northern and eastern Liaoning, and parts of south-central Jilin. (Figure), the crop filling and autumn harvest in Northeast China There is a certain impact on the development.
Agricultural production advice:
In North China and Huanghuai areas, it is necessary to prevent the adverse effects of cooling and windy weather, and take effective measures to promote early maturity of crops at maturity; greenhouse greenhouses need to take reinforcement measures, and northern North China and other places need to prevent the adverse effects of low temperature frost on crop maturity.
In the northeastern region, it is necessary to pay attention to dry water in paddy fields after rain, and timely dehumidification in dry land to increase ground temperature and promote crop maturity.
In addition, it is necessary to prevent the adverse effects of high winds and precipitation weather on pre-holiday transportation and travel.
A ballcock (also balltap or float valve) is a mechanism or machine for filling water tanks, such as those found in flush toilets, while avoiding overflow and (in the event of low water pressure) backflow. The modern ballcock was invented by José Antonio de Alzate y RamÃrez, a Mexican priest and scientist, who described the device in 1790 in the Gaceta de Literatura Méxicana.[1] It consists of a valve connected to a hollow sealed float by means of a lever, mounted near the top of the tank. The float is often ball-shaped, hence the name ballcock. The valve is connected to the incoming water supply, and is opened and closed by the lever which has the float mounted on the end. When the water level rises, the float rises with it; once it rises to a pre-set level, the mechanism forces the lever to close the valve and shut off the water flow. This is an example of negative feedback and of proportional control.
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