Winter wheat fertilization technology

Winter wheat planting is this important solar terms of farming, but also involves a very large territory, Sowing the country differ, as the farmer's proverb says: "A cold dew to frost, species Mai Mo panic." Winter wheat is a wintering crop with a long growth period. It takes a long period of time from autumn to new year, greening, jointing, heading, grouting and yield formation, especially the sowing to greening, which is the cold and arid climate in winter and spring. In order to ensure the winter wheat safely and smoothly return to green, and then lay the foundation for high yield, only by grasping the basic link of sowing, it is necessary to cultivate a tidy, strong and resistant wheat seedling group. To this end, the application of fertilization is an obvious and feasible key measure.

The high yield of winter wheat is not negligible. The effect of applying fertilizer is mainly to provide the required nutrients for the wheat seedlings. When the first came out seedlings, root development is weak, poor ability to absorb fertilizer, while in winter wheat planting, the soil temperature has a lower majority of northern China wheat growing areas, soil release their nutrients slowly, very question not on the supply may occur. The number of winter wheat seedlings for nutritional needs, while small, is very sensitive and strict, need fewer but better supply of nutrients. Therefore, the role of the seed fertilizer is to ensure that the wheat seedlings are young and vigorous, and they will survive the winter and return to green in time. This is one of the keys to high yields of winter wheat. At this time, the application of the seed fertilizer can improve the drought resistance and cold resistance of the wheat seedlings, and achieve the purpose of cultivating the strong seedlings.

What fertilizer is applied to the fertilizer? The most needed fertilizer is phosphate fertilizer. The need for phosphate fertilizer is very urgent. It is sensitive to the reaction of phosphate fertilizer, and the seedling stage is the critical period of phosphorus nutrition. At this time, if the supply of phosphorus is insufficient or severe phosphorus deficiency, both seedlings and seedlings will appear. In the case of drought and cold, there is also the problem of freezing dead seedlings; and after the seedling period, even if the phosphate fertilizer is replenished, the loss caused by this will not be compensated.

Therefore, the appropriate ratio of nutrient to nutrient distribution should be based on phosphorus, with a small amount of nitrogen. Fertilizer varieties can be compound fertilizer or single fertilizer. Such as Northwest and commonly used types of fertilizer in North China wheat varieties have diammonium phosphate, diammonium phosphate binary complex in Hefei and nitrate fertilizer can be used; the concentration is too low and the Yangtze River wheat area, the most common types of fertilizer varieties Calcium phosphate and an appropriate amount of ammonium sulfate are preferred. However, urea, ammonium bicarbonate and ammonium chloride are not suitable for seed fertilizer . Since the suitable nutrient distribution ratio of the seed fertilizer is less than the phosphorus and nitrogen, it is generally not necessary to use the high nitrogen compound fertilizer as the seed fertilizer, so as to avoid the problem of the seedlings being weak or burning.

How much is the amount of fertilizer applied? The amount of fertilizer should not be too much. It is necessary to master the principle of less and finer and promote the application of precision. Diammonium phosphate is suitable for 5 kg / mu. Although its quantity is not much, it can play the role of “ four or two pounds ”; calcium superphosphate should be 8 kg / mu; ammonium sulfate should not exceed 5 kg / mu.

Finally, the application method of the seed fertilizer and the location of the fertilization are also very important. Regardless of whether the machine is broadcasted or the animal is broadcasted, the seed fertilizer cannot be directly contacted with the wheat, and the fertilizer should be applied to the two or three centimeters below the oblique direction of the wheat. It is safe to separate the wheat from the conventional fertilizer .