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从1980年开始,我县在向应、大李家、亮甲店等公社进行钙镁磷肥(营口市效区老边磷肥厂产)试验,结果表明,微酸性土壤花生、大豆、水果施钙镁磷肥,增产效果明显。花生平均增产24％(每斤肥增产1.4斤),大豆平均增产25％,苹果平均增产11.4％,其肥效相当于过磷酸钙。 钙镁磷肥与过磷酸钙混合施用效果更好,如华家公社杨家大队,亩施过磷酸钙30斤和钙镁磷肥70斤,平均亩产570斤,比单施100斤钙镁磷肥,增产215斤。因为混合施,作物苗期先吸收过磷酸钙,而后吸收钙镁磷肥,整个生育期内有效磷能均衡供应。
Since 1980, our county has experimented on Ca, Mg and P fertilizers (Laodian Phosphate Fertilizer Plant in Yingkou effective area) to the communes of Ying, Da Li and Liangjia Branch. The results showed that the soil with slightly acidic soil, such as peanut, soybean and fruit, Magnesium phosphate, yield significantly. Peanut average yield 24% (1.4 kg per kg of fat yield), soybean average yield of 25%, an average 11.4% increase in apples, its fertilizer effect is equivalent to superphosphate. Mixed application of calcium magnesium phosphate and superphosphate effect is better, such as the Yang family Brigade, Mushu over calcium phosphate 30 kg and 70 kg of calcium magnesium phosphate fertilizer, the average yield 570 kg, 100 kg than the single application of magnesium magnesium phosphate fertilizer, Yield 215 pounds. Because of mixed facilities, crop seedlings first absorb superphosphate, and then absorb calcium magnesium phosphate, the entire growing period of effective supply of phosphorus can be balanced.