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磷矿粉为一种不溶于水的磷肥,呈磷酸三鈣的形态,不易为作物吸收利用,不如可溶性磷肥(如过磷酸鈣)那样优越,但資源丰富、价格低廉且后效長久是其优点。其化学成分除磷酸外,还含有約一半的氧化鈣和数量不小的硅、铁、鋁、鎂、氟等元素。几年来在国营农場、人民公社作了上百次的田間对比試驗,將磷矿粉施于不同作物和不同类型的土壤上,都显示出不同程度的增产效果;对施用方法也作了較深入的研究,初步証明使用磷矿粉的方法以混合肥、有机物堆漚和氮磷肥三种较为适宜,現將試驗结果簡要分述于后。
Phosphate rock powder is a kind of water-insoluble phosphate fertilizer, which is in the form of tricalcium phosphate. It is not easy to absorb and utilize crops. It is not as superior as soluble phosphate fertilizer (such as superphosphate), but its advantages are rich resources, low price and long aftergrowth . In addition to its chemical composition of phosphoric acid, but also contains about half of calcium oxide and a large number of silicon, iron, aluminum, magnesium, fluorine and other elements. Over the past few years in the state-owned farms, people’s communes made hundreds of field trials, the phosphate rock on different crops and different types of soil, have shown varying degrees of stimulation effect; application method also made more In-depth study, preliminary proof of the use of phosphate rock method to mix fertilizer, organic matter reactor and nitrogen and phosphorus three more appropriate, now the test results are briefly described later.