实践和实验研究证明,增施氮磷素化肥是提高冬麦单位面积产量的主要措施之一,尤其是追施氮素化肥对增产更有突出作用。近年来,我国氮磷素化肥的生产有很大发展,但仍不能满足冬麦生产的需要。因此,研究提高施用技术,经济利用现有的氮磷素化肥,是冬麦生产上急待解决的问题。 Practice and experimental studies have shown that the application of nitrogen and phosphorus fertilizer is one of the main measures to increase winter wheat yield per unit area, especially topdressing nitrogen fertilizer on the production more prominent role. In recent years, China’s production of nitrogen and phosphorus fertilizer have great development, but still can not meet the needs of winter wheat production. Therefore, research to improve the application of technology, economic use of existing nitrogen and phosphorus fertilizer, winter wheat production is an urgent solution to the problem.