At present, the wheat planting is approaching and farmers are preparing to do so. In the wheat sowing production process, many kinds of species are divided into: straw returning, applying base fertilizer, water-forming cultivation, rotary tillage preparation, chemical seed dressing, determining the sowing date, controlling the sowing amount, etc. Deep, squatting, etc. Links are closely linked and are indispensable. Therefore, the species is the basis for high yields of wheat, and the yield is high when the foundation is in prison.
According to years of production practice and climate change, the suitable sowing date in the southern wheat area should be held on October 8th to 16th, the central wheat area on October 5th to 13th, and the northern wheat area on October 1st to 8th. day. Before and after the cold dew planting wheat, fine seed fertilizer can help winter wheat safe winter.
October 8 is a cold dew. After entering the dew cold season, the temperature is lower, and the weather turns from cool to cold. The vast areas of the south are going to fall and the autumn is getting stronger. The northeast and northwest will present a deep autumn or will soon enter the winter. In addition to the Qinghai-Tibet Plateau, where snow is flying all year round, the northeast and northern Xinjiang regions may begin to reduce frost or snowfall. After the cold weather, there is less rain and dry weather. The precipitation in North China and Northwest China in October is generally very low. Arid and dry climates often cause difficulties for timely planting and seedling growth of overwintering crops.
From the perspective of agricultural planting and management, planting of winter wheat is an important agricultural business of this climate, and the area involved is very wide, and the appropriate sowing date varies from region to region. Just as the agricultural institute said, “cold exposure to frost, and species growth are alarmingâ€. Winter wheat is a wintering crop with a long growing period. It takes a long period of time from autumn to next year to return green, jointing, heading, grouting, and formation of yield, especially during the period from sowing to returning green. It coincides with the low temperature and arid climate in winter and spring. In order to ensure the safe wintering of winter wheat and the successful return of green crops to lay a foundation for high yields, it is only necessary to seize the basic link of sowing to cultivate a group of wheat seedlings that are neat, robust, and resistant. For this reason, the application of seed fertilizer is a key measure with obvious and feasible results.
Winter wheat gets high yield, and seed fertilizer cannot be ignored. The role of seed fertilizer is to provide the necessary nutrients for the wheat seedlings. When the seedlings just came out, the roots developed weakly and the ability to absorb fertilizer and water was poor. However, when the winter wheat is planted in vast northern wheat areas, the soil temperature is already low, and the nutrients released from the soil itself are slow, and the nutrients may not be supplied. The winter wheat seedlings, although few in terms of nutrient requirements, are sensitive and strict and need to provide less nutritious nutrition. Therefore, the role of seed fertilizer is to ensure that the wheat seedlings are strong, wintering, and returning green in time, which is one of the keys to the high yield of winter wheat. At this time, fine application of seed fertilizer can improve the ability of wheat seedlings to resist drought and resist cold and achieve the purpose of cultivating strong seedlings. Many years of production practice have proved that when planting winter wheat in wheat fields with low fertility or no organic fertilizer all year round, it is necessary to combine deep basal fertilizer with NPK combined with arable land, and also apply appropriate amount of seed fertilizer at the time of sowing. Only in this way can strong seedlings be raised and yields raised.
Fertilizer applied fertilizer? The most important fertilizer is the application of phosphate fertilizer. Wheat seedlings are in urgent need of phosphate fertilizers. They are sensitive to phosphorus fertilizers. The seedling period is also the critical period of phosphorus nutrition. If phosphorus deficiency or severe phosphorus deficiency occurs, it will not only cause weak seedlings and seedlings, but also cause drought and drought. In the cold, there is the problem of frozen dead seedlings. But after the seedling period, even if the additional phosphate fertilizer can not make up for the loss caused at this time. Some people may think that phosphorus has been applied to basal fertilizers. Why does the seed fertilizer also emphasize the use of phosphate fertilizers? Because of the deep application of phosphorus in the basal fertilizer and the shallow root system of the young wheat, the wheat seedlings are not absorbed due to the spatial misalignment. In addition to the characteristics of phosphorus, its mobility in the soil is worse than that of nitrogen and potassium, and its space efficiency is low. Therefore, phosphate fertilizer should be applied in layers. In addition to the deep application of phosphorus base fertilizers, but also through the application of fertilizers available fertilizers, in order to make up for this defect; In addition, phosphorus has an obvious role in promoting root development, can play a role in enhancing the absorption of other nutrients.
Therefore, the appropriate nutrient ratio for seed fertilizer is mainly phosphorus, with a small amount of nitrogen. Fertilizer varieties can be compound fertilizer or single fertilizer. For example, diammonium phosphate is commonly used in the northwestern and northern wheat areas, and diammonium phosphate and nitrophosphate can be used in binary compound fertilizers; in the middle and lower reaches of the Yangtze River, the most commonly used fertilizer varieties are low in concentration. Calcium phosphate and appropriate amount of ammonium sulfate. However, urea, ammonium bicarbonate and ammonium chloride are not suitable for seed fertilizer. Because the suitable nutrient ratio of seed fertilizer is less phosphorus and nitrogen, high nitrogen compound fertilizer is generally not used as a seed fertilizer to avoid causing seedling emergence or burning.
What kind of fertilizer is reasonable? The amount of fertilizer can not be used in large quantities, and it is necessary to grasp the principle of less and more refined, and promote the use of precise quantities. Diammonium phosphate is suitable for 5 kg/mu. Although its amount is small, it can play the role of “doing four thingsâ€; superphosphate is suitable for 8 kg/mu; ammonium sulfate should not exceed 5 kg/mu.
Finally, the method of applying fertilizer and the location of fertilization are equally important. Regardless of the method of sowing or livestock sowing, the seed fertilizer can not be directly contacted with the wheat seed. It is necessary to apply fertilizer under the oblique position of 2 to 3 centimeters below the wheat seed to separate the wheat seed from the chemical fertilizer.
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