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Strong precipitation in the northeast is not good for crop growth, and southern rice fields should be protected against high temperature hazards.
At present, spring maize in the northeastern region has entered a general period of tasseling. Soybeans are in the general stage of pod formation. One season of rice enters the prevalence period of panicles, and the development period of parts of the central and eastern parts is slightly later than normal. Since late July, most of the northeastern regions have experienced precipitation of more than 10 mm, and the number of rainy days has reached 3-11 days. The precipitation in the southeast and north parts of the northeastern region has reached more than 50 mm, and the central and eastern parts of Liaoning and the southeastern part of Jilin have exceeded 200 mm. Excessive precipitation caused over-humidity of farmland soil, and some low-lying plots were flooded, which affected the root respiration and nutrient absorption of crops. At the same time, the rainy weather was not conducive to spring wheat ripening, rice booting and corn pollination.
In the next three days, there will be heavy rain or heavy rain in most parts of the Northeast. Heavy rains will occur in the central part of Jilin Province and in eastern Liaoning. Some areas are accompanied by strong convective weather such as short-term thunderstorms or hail. The soil in the south central and eastern parts of the northeastern region will continue to be too wet. Some local farmland may have waterlogging, which is unfavorable to the growth and development of dryland crops such as soybeans and corn. Strong convective weather such as thunderstorms or hail may cause corn, soybeans, etc. to fall; It is also not conducive to the ripening of spring wheat and the earing of a season of rice. All localities should pay close attention to the process of heavy rainfall, clear up the drainage and draining in time, strengthen the field management of crops damaged by waterlogging, and avoid or reduce the damage caused by disasters to autumn harvest crops.
In addition, in the next three days, Jianghuai, Jianghan, Jiangnan, most of southern China, most of Chongqing, eastern Guizhou, and eastern Sichuan Basin have high temperature of 35-37 °C, including southeastern Zhejiang, north-central Jiangxi, northern Hunan, etc. The maximum temperature in parts of the area can reach 38-40 °C. High temperature is unfavorable for the heading of rice in the Yangtze River Basin, which is easy to cause the increase of open space. At the same time, high temperature is not conducive to the transplanting of late rice and greening in the south of Jiangnan and southern China. Jianghuai, Jianghan, most of Chongqing, eastern Guizhou, and eastern Sichuan Basin should pay attention to deep water to reduce panicle temperature and prevent high temperature from affecting earing; Jiangnan and South China should avoid late transplanting of late rice at high temperature and strengthen post-transplantation of late rice. Field management, pay attention to water temperature regulation to prevent high temperature hazards.
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