A rain in the northern wheat area is very beneficial to wheat grain filling.

From the night of May 7 to the night of the 10th, under the influence of natural rainfall and artificial precipitation, the winter wheat area in northern China appeared the largest range of rain since the spring. The rainfall made Shanxi, Shaanxi, Hebei, Beijing, Tianjin, Shandong. In Henan, Anhui, Jiangsu, Hubei, Ningxia, Gansu and other 12 provinces (autonomous regions and municipalities), the cumulative increase of water resources was 50.45 billion cubic meters. At present, winter wheat in the north has entered the heading or filling stage, which is the critical period of water demand. Large-scale flooding is very beneficial for winter wheat heading and grain filling. It is expected that the hydrothermal conditions will be beneficial to the formation of winter wheat and the growth of spring-sown crops in the next 10 days. All localities should seize the favorable opportunity to strengthen field management to ensure the stable production of high-yield summer crops and the normal growth of spring-sown crops.

The precipitation has effectively alleviated the drought in the early part of the winter wheat area in the north, and the soil moisture in most farmland has improved significantly. According to the results of soil moisture monitoring, the soil shortage of 20 cm in the northwestern part of the country, the central and western parts of North China, the western and southern parts of Huanghuai, the western part of Jianghuai, and the northern part of Jianghan is basically relieved. The soil moisture of most farmland is in a suitable state, only in southern Gansu. The relative soil moisture in the southwestern part of Henan is still below 60%.

At present, most of the northern winter wheat is in the booting to heading stage, and some areas enter the filling stage, which is the critical period of wheat water demand. This precipitation is equivalent to pouring a grain of water into the wheat, which is beneficial to the increase of wheat grain weight and reduction of empty grain. At the same time, it also increases the air humidity in the canopy of the wheat field, which is conducive to reducing the damage of dry hot air in the later period. In addition, sufficient precipitation is also conducive to the emergence of spring planting and seedling transformation in the north, and has created good water conditions for the transplanting of rice in Jianghuai and Jianghan.

It is expected that in mid-May, the temperature in the eastern part of the northwestern region, North China, Huanghuai, Jianghuai, Jianghan and other places will be high. The eastern part of the northwestern region, North China and Huanghuai will have 1~10 mm of rainfall. The hydrothermal conditions are generally conducive to winter wheat yield formation and spring sowing. Crop growth.

Concerns and suggestions:

First, winter wheat in the north is at a critical stage of yield formation. Wheat fields with poor soil fertility should use this favorable precipitation weather process, increase the application of panicle fertilizer in time, ensure the demand for nutrients in wheat grouting, and promote the formation of yield. At the same time, strengthen winter wheat. Monitoring and control of pests and diseases.

Second, the areas that have not completed the spring sowing task should be robbed and planted. The areas that have completed the spring sowing should check the seedlings and make up the seedlings in time, and strengthen the field management to ensure that Miao Qi and Miao Zhuang are strong.

Third, the Jianghuai and Jianghan areas should seize the opportunity of favorable precipitation, do a good job of water storage, and ensure the water for transplanting rice in one season. The rice areas that cannot be bred by drought can choose medium-late varieties, and broadcast a single season rice by live broadcast.