论文部分内容阅读
沉淀硝酸磷肥是用稀硝酸(30—40%)和中低品位磷矿粉(含磷20%左右)生产的化肥。产品有效磷含量可以达到12%以上,含氮3—5%,游离水19%。游离酸极少,是一种以二水磷酸二钙为主,同时含有硝酸铵和硝酸钙的氮磷复合肥料,酸碱度微酸性至中性,宜作基肥、种肥或沾秧根。肥效与等氮磷的普钙、硫酸铵接近。据大田试验,沉淀硝酸磷肥施于水稻、玉米,比对照分别增产80%和23%,而施等氮磷的普钙、硫酸铵的比对照增产83.1%和20.2%。小麦盆栽试验结果,苗期效果稍低,生长45天后肥效与等氮磷普钙、硫酸铵相当。制作沉淀硝酸磷肥所需原料较易解决,制作设备简单,流程短,
Precipitated nitrophosphate is a fertilizer produced from dilute nitric acid (30-40%) and medium- and low-grade phosphate rock (about 20% phosphorus). Effective phosphorus content of products can reach more than 12%, nitrogen 3-5%, 19% of free water. Free acid is very little, is a mainly of dicalcium phosphate dihydrate, at the same time containing ammonium nitrate and calcium nitrate of nitrogen and phosphorus compound fertilizer, acidity slightly acidic to neutral, should be used as a base fertilizer, fertilizer or stained roots. Fertilizer efficiency and other nitrogen and phosphorus of calcium, ammonium sulfate close. According to the field experiment, the precipitation of nitrophosphate applied to rice and maize increased by 80% and 23% respectively compared with the control. However, the addition of N and P such as P and Ca increased 83.1% and 20.2% compared with the control. Pot experiment results of wheat, the seedling effect is slightly lower, after 45 days of growth and other nitrogen and phosphorus and calcium, calcium sulfate equivalent. Precipitated nitrophosphate production of raw materials needed easier to solve, production equipment is simple, short process,