黑龙江省西部松嫩平原有草原2600万亩,占全区土地面积31.7%,占全省草原面积的34.1%,草原连片,草质优良,以盛产羊草驰名中外,为我国面积较大的草原之一。草地施肥是调节和控制草原生态系统营养物质平衡,促进草原生产迅速发展的一项重要措施,为了研究羊草草原合理施用化肥的增产效果,1980— Heilongjiang Province, western Songnen Plain 26 million mu of grassland, accounting for 31.7% of the land area of ​​the region, accounting for 34.1% of the province’s grassland area, grassland contiguous, excellent grass quality, rich in sheep grass known at home and abroad, for our larger area One of the prairie. Grassland fertilization is an important measure to regulate and control the nutrient balance of grassland ecosystem and promote the rapid development of grassland production. In order to study the yield increase effect of rational application of chemical fertilizers in the grassland,