Since October, the precipitation in the southern part of Hebei, Huanghuai and Jianghuai has been decreasing. The average precipitation in Shandong Province is the second-lowest value in the history since 1961. The precipitation in Jiangsu is the fourth lowest value since 1961, and the soil moisture is decreasing. Recent meteorological drought monitoring showed that drought occurred in the central and southern parts of Hebei, Huanghuai and Jianghuai. Among them, heavy drought occurred in southern Hebei, most of Shandong, Anhui and northern Jiangsu, and some parts of Shandong reached extreme drought. Due to the abundant soil bottom and the winter irrigation in most areas, the drought effect is generally lighter. However, some areas with poor irrigation conditions in the south of Huanghuai and northern Jianghuai are more severely affected by drought, which is not conducive to the formation of strong winter wheat and safe wintering.
It is predicted that precipitation in North China, Huanghuai, Jiangnan and South China will be less in winter, and drought will continue in some areas, and the scope will be expanded. It will have some impact on winter wheat wintering and southern autumn and winter crop growth in North China. Miaoqing strengthens field management and does a good job in drought relief.
Since October, the precipitation in Huanghuai and Jianghuai has been severely low, the temperature is high, and the meteorological drought has developed rapidly
Since October 2010, the precipitation in the southern part of Hebei, Huanghuai and Jianghuai is less than 50 mm. Compared with the same period of the previous year, the precipitation is less than 50%, especially in most areas of Huanghuai, the precipitation is less than 80%; 2010 Since October, the temperature in the southern part of Hebei, Huanghuai and Jianghuai is 0~2°C higher.
Since October 2010, the average precipitation in Shandong Province is 9.2 mm, which is 52.3 mm less than the same period of the previous year. It is the second-lowest value in the history since 1961, second only to 1969 (9.1 mm); the precipitation in Jiangsu is 31.3 mm. It is 77.5 mm less than normal year-on-year, the lowest value in the same period since 1989, and the fourth lowest value since 1961.
Due to the low precipitation since the fall, the meteorological drought in the Huanghuai, Jianghuai and most of the eastern part of the northwestern region has developed rapidly. In mid-November, there were mild to moderate-intensity meteorological droughts in most parts of Huanghuai and Jianghuai. The meteorological drought monitoring on December 5, 2010 showed that there were moderate to moderate meteorological droughts in the central and southern parts of Hebei, Huanghuai and Jianghuai. Among them, the southern part of Hebei, the majority of Shandong, Anhui and northern Jiangsu reached the level of heavy drought. drought.
Second, the impact of the current drought on agricultural production
Due to different irrigation conditions, the current drought effects in dry areas are also different. At present, most of the winter wheat in the north is in the tillering stage, and part of the winter wheat in the northern part of North China enters the wintering period; most of the winter wheat in the Jianghuai and Jianghan areas is in the seedling stage. Due to the good soil bottom sag in the early stage, the drought in most areas is limited to the lack of water in the surface soil, which has not caused large-scale dead seedlings and seedlings, especially the wheat seedlings that have been poured through winter water; but southern Shandong and the peninsula, northern Anhui And the northern part of Jiangsu Province is affected by the continuous lack of precipitation, the drought is heavier, some of the wheat fields are lacking in seedlings and ridges, and serious fields even appear dry and dead. According to the drought survey results of agriculture and meteorological departments, at present, about 2.4 million mu of winter wheat in Shanxi has a mild drought, accounting for about 20% of the wheat planting area, mainly concentrated in Linyi and Yuncheng areas; the winter wheat area in Hebei Province is 7.6 million. The acre is mainly distributed in the western mountainous area and the central and southern parts of the country; the proportion of light and drought in wheat in Henan is 24.1% (about 19.13 million mu), and the proportion of medium-heavy drought is 3.8% (about 2.74 million mu), mainly in Zhengzhou and Jiaozuo. , Luoyang, Shangqiu, Xinxiang, Xuchang and other places; Jiangsu wheat drought area of ​​about 16 million mu, mainly concentrated in Lianyungang, Suqian, Xuzhou and other places.
According to the results of remote sensing monitoring of wheat growth in the main winter wheat fields in northern China on December 3, the wheat seedlings in different regions were uneven. The winter wheat in North China and Huanghuai grew better than last year. The winter wheat growth in south central Shandong and parts of Jianghuai was higher than that in the previous year. Deviation, the wheat seedlings in Anhui and Jiangsu were generally worse than the previous year.
3. In the next ten days, the drought in some areas of Huanghuai, North China will continue or develop
The drought in some parts of North China and Huanghuai will continue or develop. In the next ten days, there will be no precipitation in the meteorological arid regions in the northwestern part of the northwest and central and southern China, and the drought will continue or develop. From the 12th to the 13th, there will be a precipitation process in the meteorological arid area of ​​Huanghuai and Jianghuai. The precipitation in the Jianghuai area is 10~25 mm, which is beneficial to alleviate the local meteorological drought. However, the precipitation in the Huanghuai area is generally less than 5 mm. The drought in the region will continue.
In the winter of this year, precipitation in North China, Huanghuai, Jiangnan, and South China is less, and precipitation is more in Inner Mongolia, the central and eastern parts of the Northwest, and the Northeast. This winter is expected to be in northern Xinjiang, most of Inner Mongolia, most of Gansu, northeastern Qinghai, Ningxia, Shaanxi, Heilongjiang, Jilin, eastern Liaoning, southern Jiangsu, Shanghai, northern Zhejiang, most of Anhui, and eastern Hubei. Precipitation in southern Sichuan, northern Yunnan, and western Guizhou is more than normal; precipitation in most other parts of the country is less than normal in the same period of the year, with 2 to 50% less in central and southern Fujian, southeastern Jiangxi, central and eastern Guangdong, and southwestern Tibet.
Fourth, agricultural production recommendations
In December, precipitation in southern China and northern Huanghuai will be less, and soil moisture will continue to decline in some areas. The drought will continue or develop, which may lead to a decline in winter wheat seedlings, a decrease in tillering before winter, and affect the population density of wheat. It is not conducive to the formation of strong winter wheat. To this end:
1. Strengthen the management of winter wheat fields. Winter wheat area should timely check the grievances and seedlings, and classify and manage according to specific conditions. For the wheat fields that have been poured over the winter water, timely cut the loose soil, remove the knots, and ventilate and protect the ground to raise the ground temperature; the areas with irrigation conditions should be finely watered or sprinkled with small water in the afternoon; no irrigation conditions or cold weather is not suitable In areas irrigated, measures such as suppression, fertilization and cover may be used to protect against drought; for wheat fields with sufficient bottom, normal growth or high growth, watering should be postponed, moderate tillage or suppression should be carried out to inhibit excessive growth of aboveground parts and ensure winter wheat formation. Strong seedlings and safe wintering.
2. Do a good job in water storage and drought prevention and construction of farmland water conservancy infrastructure. In North China, Huanghuai and northern Jianghuai, it is necessary to take measures to protect the winter and spring drought. All localities should also do a good job in the construction of farmland water conservancy infrastructure, repair, improve and support water conservancy facilities to enhance agricultural disaster prevention and resilience.
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