Increasing winter wheat fertilizer resistance

In order to achieve high yields of winter wheat, the application of seed fertilizers 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 weak. In the vast northern wheat region, when the winter wheat was sown, the soil temperature was already low, and the nutrients in the soil were released slowly, and the nutrient supply problem was likely to occur. 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, they can pass through winter and return to green in time. This 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.

Fertilizer applied fertilizer? Fertilizer is the most needed fertilizer. Wheat seedlings are very urgent for phosphate fertilizers. They are sensitive to phosphate fertilizers. The seedling stage is also the critical period of phosphorus nutrition. If phosphorus deficiency or severe phosphorus deficiency occurs at this time, both weak seedlings and seedlings will appear. In the case of drought and cold, there is the problem of frozen dead seedlings; after the seedling period, even if additional phosphate fertilizer is applied later, it will not be able to make up for the loss caused by this time.

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 ammonium sulfate are suitable. However, urea, ammonium bicarbonate and ammonium chloride are not suitable for seed fertilizer. Because the appropriate nutrient ratio of fertilizer is less phosphorus and nitrogen, usually do not use high-nitrogen compound fertilizer as seed fertilizer, so as to avoid the problem of seedling sprouting or burning seedlings.

How much is the amount of fertilizer application 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 it is small in quantity, it can play the role of “doing two things in a row”; superphosphate is 8 kg/mu; ammonium sulfate should not exceed 5 kg/mu.

Finally, the method of application of fertiliser and the location of fertilization are equally important. Regardless of the method of sowing or livestock sowing, the fertiliser cannot be directly contacted with the wheat seed, and the fertiliser is applied at a distance of two or three centimeters below the angle of the wheat seed. It is safe to separate wheat seeds from conventional fertilizers.