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钙镁磷肥是利用热法生产的一种新型磷肥,一般含磷量是14～18%,并含有12～13%的镁素养分,是一种灰色或暗绿色的粉末,无臭无味.钙镁磷肥的制法简易,用磷矿石、蛇蚊石或橄榄石(也可用白云石加硅石代替)在高温下熔融,经冷却、粉碎、磨细即成.由于钙镁磷肥不需要其它化学品作原料,对矿石成份要求也不严格,生产程序简单,产品成本低廉,因此这种肥料在我国发展很快.由于钙镁磷肥是一种构溶性(微酸溶性)磷肥,宜于微酸性及酸性土壤上施用,一般宜作基肥,也可作种肥或近根条施追肥.钙镁磷肥在石灰性土上的肥效如何,目前试验资料不多,根据1959年河北芦台农场在小麦上试验,肥效等于过磷酸钙的85%.我区去年曾用和钙镁磷肥同属构溶性的脱氟磷肥在灵武农场水稻上和在青铜峡县甜菜上做过试验,肥效良好.至于钙镁磷肥在我区哪些土壤、作物上施用有效,尚待试验鉴定.
Calcium Magnesium Phosphate is a new type of phosphate fertilizer produced by the thermal method. It generally contains 14-18% of P and contains 12-13% of magnesium. It is a kind of gray or dark green powder with odorless and tasteless calcium Magnesium phosphate fertilizer system is simple, with phosphate rock, snake mosquito stone or olivine (dolomite and silica can also be used instead of) at high temperature melting, the cooling, crushing, grinding Serve.Due to the fact that other chemical As raw materials, the requirements of the ore composition is not strict, the production process is simple, the product cost is low, so this kind of fertilizer developed rapidly in our country.Because of magnesium phosphate fertilizer is a structure-soluble (slightly acid soluble) phosphate fertilizer, suitable for slightly acidic And acid soil application, generally suitable as a base fertilizer, also can be used as fertilizer or near root top dressing.Calcium Magnesium Phosphate Fertilizer in calcareous soil how the current experimental data is not much, according to the Hebei Lutai Farm in 1959 in wheat On the test, the fertilizer effect is equal to 85% of superphosphate .To last year, our district and the use of both calcium and magnesium phosphate-soluble defluoridation of the same plant in Lingwu farm rice and sugar beet in Qingtongxia County has done a good fertilizer .As for the calcium Magnesium phosphate fertilizer in our area which soil, crop effective, yet to be tested Identification.