论文部分内容阅读
磷石膏是磷肥厂废渣,做为化学改良剂已成功的用于碱土改良。此外,本试验证明,由于磷石膏含丰容的可溶性钙、硫、磷和微量元素,因此可做为低浓度肥料和微量元素供给剂,广泛的施在北方石灰性土壤上,其增产效果明显。如果用在碱化土壤上,可起到改良剂和肥料的双重作用。部分磷石膏含少量重金属和一定量的氟,但因重金属多以不溶解态存在,氟又在碱性条件下溶解度高,而在中性和酸性条件下溶解度低,所以施用磷石膏不会造成土壤与作物的污染。
Phosphogypsum is phosphate fertilizer plant waste, as a chemical modifier has been successfully used for alkaline earth improvement. In addition, this experiment proved that because phosphogypsum contains abundant soluble calcium, sulfur, phosphorus and trace elements, it can be used as a low-concentration fertilizer and trace element supply agent and widely applied in the northern calcareous soil, and the yield increase effect is obvious . If used in alkalized soil, can play a dual role of modifiers and fertilizers. Some phosphogypsum contains a small amount of heavy metals and a certain amount of fluorine, but due to the presence of heavy metals in an insoluble state, fluorine has high solubility in alkaline conditions and low solubility in neutral and acidic conditions, so the application of phosphogypsum will not result in Soil and crop contamination.