Low temperature risk prediction of rice on April 28-29
Summary: It is expected that the minimum temperature at night on April 28 will be - 4~- 2 ℃ in the Great Khingan Mountains, Yichun, Hegang, and 0~2 ℃ in other regions. On the morning of the 29th, there was light frost or frost in most areas. Combined with the future weather forecast, the rice low-temperature risk prediction model is used to predict the moderate risk area of rice low-temperature in our province from April 28 to 29 Mainly distributed in Yichun, Harbin, Jiamusi, Hegang and Qitaihe (city, district) 。 It is suggested that rice growers in medium risk areas should do a good job of cold prevention and warmth preservation in advance, and rice transplanting is not recommended.
1、 Weather situation forecast
It is predicted that from the night of the 28th to the day of the 29th, it will be cloudy with showers in the north of the Great Khingan Mountains and Mudanjiang River, and it will be sunny and sometimes cloudy in other areas. The minimum temperature at night on the 28th: - 4~- 2 ℃ in the Great Xing'an Mountains, Yichun, Hegang, and 0~2 ℃ in other regions. The highest daytime temperature on the 29th: 13~15 ℃ in the north of the Great Khingan Mountains, 15~17 ℃ in other regions. In addition, the gust in the northern and eastern regions during the daytime on the 28th was 6-7, of which the northeast regional local area could reach 8; On the night of 29th, there was sleet in some parts of southeast China; On the morning of the 29th, there was light frost or frost in most areas.
2、 Low temperature risk prediction of rice on April 28-29
On April 28-29, the low temperature moderate risk areas of rice in our province were mainly distributed in 8 counties (cities and districts) of Yichun, Harbin, Jiamusi, Hegang and Qitaihe, which are Tieli of Yichun City, Mulan of Harbin City, Tangyuan, Huachuan, Tongjiang and Fuyuan of Jiamusi City, Hegang District of Hegang City, and Qitaihe District of Qitaihe City, The area of medium risk affected area is about 14000 square kilometers.
3、 Impact analysis
Based on the analysis of the research results of the national key research and development projects during the 14th Five Year Plan period, low temperature and low risk areas of rice have little impact on rice seedling raising; In the middle risk area of low temperature of rice, low temperature is easy to slow down the growth rate of rice seedlings in the rice seedling breeding shed. It is suggested that rice growers all over the country should do a good job in advance to cope with the cold and keep warm in the rice nursery shed in medium risk areas. At the same time, rice transplanting is not recommended.
