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To seize the high yield of winter wheat, we must seize the pre-winter strong seedlings and cultivate the pre-winter strong seedlings is the key to achieve high yields and stable production. Wheat needs active accumulated temperature of 1700~2400e in its lifetime. The optimum accumulated temperature for pre-winter seedlings is 500~700e, and at least cannot be less than 400e, otherwise weak seedlings will be formed, but it cannot be higher than 700e, resulting in prolonged seedling life and not only consuming soil nutrients. Moreover, the accumulation of nutrients in plants is low, the cold resistance is weak, and winter is susceptible to freezing damage, which causes the growth to return to green and late in the year and affects the yield. Therefore, studying and mastering the requirements of crops on meteorological conditions and their reflection laws can provide scientific basis and practical guidance for crop production management. The hand-held meteorological instrument has a very important role in the development of modern agriculture. It can effectively measure agricultural meteorology and provide scientific basis for agricultural cultivation measures.
In areas with a large number of hours of sunshine, crop yields are higher. However, the combination of sunshine hours and water temperature conditions is different, and crop production is different. There are many hours of sunshine during the year and low crop yields in areas with low moisture. There are more sunshine hours in the year and higher yields in areas with more water. Annual production in regions with high sunshine hours and high temperatures is not very high. There are many hours of sunshine and the temperature is low, and the production of cool and cool crops is high. Low sunshine hours and low temperatures result in low yields. The components of wheat yield are: yield per unit area = unit area @ number of grains / ear @ grain weight. Although the yield components are determined by the characteristics of the varieties and cultivation measures, it can be seen that the meteorological conditions play an important role compared with the same varieties and similar cultivation conditions.
The observation of agro-meteorological conditions by hand-held meteorological instruments can predict the status of agricultural biological fertility production disasters, more in line with the needs of agricultural production, and timely carry out relevant plant protection control measures to ensure the growth of food crops and the guarantee of output. . Further promote the refinement of modern agriculture.
Wheat is one of China's important food crops and its planting area is very broad. Because the wheat prefers a cool and dry climate, it can be grown in areas with a minimum temperature of -30e and in temperate and subtropical low-temperature seasons, and adapted to be planted in dry areas of the atmosphere. Wheat is divided into winter wheat and spring wheat. Compared with the two, winter wheat has higher yield and stable yield. Water is a major problem in high yield wheat. In areas with an annual rainfall of 200mm, wheat production is low. The key to developing wheat production is to improve irrigation conditions and implement water-saving cultivation.