为什么要推广磷矿粉磷是肥料三要素之一,是作物生长发育上不可缺少的一种营养料。本省酸性土壤占耕地总面积百分之八十以上。在酸性土壤中,含磷量低,一般含全磷量万分之三至六,不能满足作物高产的需要。近年来,施用过磷硫钙和钙镁磷肥,获得显著增产,使用范围日益扩大,每年所需数量巨大。但是生产过磷酸钙和钙镁磷肥需要大量的硫酸和焦炭,这就限制了磷肥生产的发展,满足不了农业生产的需要,而推广磷矿粉直接施用,可以节省大量的硫酸和焦炭,降低成本,是解决当前农业上磷肥供不应求和扩大磷肥来源的一个重要途径。我国绝大部分磷矿,含有效磷量,一般在百分之三至六,高达百分之十以上。这一部分 Why to promote phosphate rock phosphorus is one of the three elements of fertilizer, crop growth and development is an indispensable nutrient material. The province’s acid soil accounts for more than 80% of the total arable land. In acidic soils, phosphorus content is low, generally three to six ten thousandths of the total phosphorus, can not meet the needs of high-yield crops. In recent years, the use of over-calcium and calcium-magnesium phosphate fertilizer, access to a significant increase in production, the use of a growing range of large quantities required each year. However, the production of superphosphate and calcium magnesium phosphate need a lot of sulfuric acid and coke, which limits the development of phosphate fertilizer production, can not meet the needs of agricultural production, and promote the direct use of phosphate rock powder, can save a lot of sulfuric acid and coke, reduce costs , Is an important way to solve the current shortage of agricultural phosphate fertilizer and expand the source of phosphate fertilizer. Most of China’s phosphate rock, containing available phosphorus, generally at three to six, up to 10% or more. this part