As of September 16, the autumn harvest crops in most of the country were in the stage of grouting milk ripening, and the rice and corn in the central and southwestern parts of the northeastern region, the western part of Huanghuai and the Jianghan were in the mature harvest period. Most of the cotton in Xinjiang, the Yellow River Basin and the Yangtze River Basin are in the bell-and-bubble period.
From September 13 to 15, most of the northeastern regions have weak precipitation, and the northern part of the temperature is low, which is not conducive to the late filling and maturity of autumn harvest crops. In the eastern part of the northwestern region, the northerly sunshine in North China is less than the majority of Huanghuai and the western part of Jianghan. It is still not rainy and irritating, which is not conducive to the late grouting of corn, soybean and other crops and cotton cracking and bolling. The majority of Jianghuai, Jiangnan and South China are mainly sunny, which is conducive to cotton cracking bolls, one season rice grouting and late rice heading. Drought persists in southeastern Sichuan, western Chongqing, eastern Guizhou and southwestern China, which is not conducive to autumn crop harvesting and rapeseed.
It is expected that from September 17 to 19, there will be significant precipitation in the southeastern part of the northwestern region, southwestern part of North China, Sichuan Basin, and northwestern Huanghuai, including the western Sichuan Basin, the central and southern parts of Shaanxi, the southwestern part of Shanxi, and the western part of Henan. There is heavy rain in the ground, it is not suitable for autumn harvesting crops to mature and harvest drying. The central part of Yunnan and the southwestern part of the country are mainly dominated by weak precipitation, which is more suitable for mature harvesting of autumn harvest crops. Most of the northeastern part of China and most of Xinjiang are mainly sunny, suitable for harvesting and drying of mature crops.
From the 17th to the 19th, due to the influence of cold air, the temperature in the north and south of the Yangtze River will drop by 4-8 °C, and the temperature drop in the central part of Inner Mongolia, northern North China, and southern part of Northeast China may exceed 10 °C. Frost will appear in the western and northern parts of Heilongjiang and western Jilin, and the cooling and frost will not be conducive to the late filling of corn and other crops. There is no frost in Xinjiang's agricultural areas, which is conducive to the full filling of mature crops such as corn and cotton cracking bolls.
From 19th to 22nd, the temperature in Jianghuai and most of the south of the country showed a significant downward trend. The average daily temperature in Jianghuai and Jiangnan will be lower than 22 °C for 3-4 consecutive days. Light to moderate cold dew will appear in the north and south of Jiangnan, which is not conducive to late rice heading and flowering. 
Cold dew winds hit the late rice storm
Agricultural production advice:
1. Work in the northeastern region should be done in a frost-proof manner. For the cornfields that are greedy, the weeds in the field should be removed in time to improve the ventilation and light-transmission conditions of the farmland and promote the full maturity of the crops. The cooked area is harvested and dried in time.
2. The eastern part of the northwestern part, the eastern part of the Sichuan Basin, the southern part of North China, the northern part of Huanghuai, and the western part of Hubei should pay attention to the dehumidification and dewatering, improve the ventilation and light transmission conditions in the field, promote the ripening of crops, and harvest in time.
3. Most of the late-season rice in the south of the Yangtze River is sensitive to temperature during the stage of heading and flowering. Before the temperature drop comes, the method of deep water can be taken to prevent the cold dew.
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