First, fertilization technology 1, nitrogen and phosphorus as a base fertilizer once deep. Before the wheat sowing, all nitrogen and phosphorus fertilizers are deep-fertilized or mixed with the seed fertilizer, and the fertilizer is no longer top-dressed during the growth period. This technology is generally applied to low yield levels, heavy soil quality, and low rainfall during wheat growth period. Wheat fields with poor irrigation conditions , It can increase the utilization of fertilizers, save labor, and reduce costs. However, it should not be used in fields with light soil texture, high groundwater levels, and high-yield fertilization. 2, "before nitrogen shift" fertilization technology. Compared with conventional fertilization, the amount of nitrogen applied is shifted. That is, based on the application of organic fertilizer and stipulated. Potassium fertilizer, base nitrogen is reduced, and the previous period (before or during winter) of nitrogen is used. The other meaning is that compared with conventional fertilization. The period of application of spring nitrogen was shifted from the top dressing stage to the booting stage at the jointing stage. The “backward shift of the first nitrogen†can delay the aging of the roots and flag leaves, improve the light and material production capacity in the later period, and increase the wheat yield. This technique is mainly applicable to fields with high soil fertility levels and good irrigation conditions. It is not difficult to obtain the desired number of acres per mu at this time, but the role of grain number and grain weight per mu is relatively increased, and high yields must result in three yield components. The coordinated development of the elements resulted in a higher number of grains per ear. 3, increase "nitrogen. Scales" and "stabilize nitrogen and increase potassium with micro-" fertilizer technology. Different yields of wheat, due to the different needs of nutrients. The corresponding soil fertility in different wheat fields. Fertilization habits and levels are different, the main contradiction of rational fertigation to solve differences. In low-yield wheat fields, due to the general lack of nitrogen and phosphorus in the corresponding soils themselves, the amount of fertilizers in the production is insufficient and the deficiencies of other elements have not yet been exposed. The main problem in production is the shortage of nitrogen and phosphorus in fertilizers, so nitrogen and phosphorus are needed. . On the other hand, as the demand for nutrients increases, the types of nutrient limiting factors in the soil increase, and fertilization needs to solve the problem of imbalance in a variety of nutrients. Under current conditions, “stabilize nitrogen and increase phosphorus and supplement potassiumâ€. According to investigations by wheat expert Jie Xiaolei et al. (1995-2000) on soil nutrient limitation in high-yield wheat fields in the fluvo-aquic wheat region, it was found that potassium in a large number of elements has risen as a limiting factor limiting the increase of wheat yield, and zinc is a major limiting factor in trace elements. , followed by manganese and boron. Second, the amount of wheat fertilizer According to a large amount of research data and practice, it shows that the output per mu is 500 kg, and the application amount of nitrogen, phosphorus and potassium per mu is 12-16 kg, 6-8 kg and 5 kg, respectively, of which the nitrogen base recovery ratio is 6:4; 600 kg per mu production level, the amount of nitrogen, phosphorus and potassium acres were 14-20 kg, 8-10 kg and 10 kg, respectively, nitrogen basis recovery ratio of 5:5. In medium fertility soils, the upper limit can be used, while in high fertility soil conditions the lower limit can be used. Tattoo Nitrile Gloves,Disposable Nitrile Gloves,Powder Free Cheap Glove,Blue Disposable Nitrile Gloves Puyang Linshi Medical Supplies Co., Ltd. , https://www.linshihealths.com