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1982～1984年,以黄土性母质的棕壤为试材,进行磷肥腐殖酸混合肥的盆栽试验和田间试验。结果表明,过磷酸钙与腐殖酸的配比为1:5和1:10对大豆、玉米均有明显的增产效果。磷腐1:5可提高大豆产量34.9%;1:10可提高玉米产量37.6%。增产原因是磷腐适量混配可提高大豆对磷肥利用率4.0～5.7%,提高幅度为27.2～38.8%;提高玉米对磷肥的利用率0.7～3.9%,提高幅度4.2～23.5%。腐殖酸减弱磷肥固定,促进作物根系生长和吸收能力等综合作用的结果。
From 1982 to 1984, the brown soil of loess parent material was used as the test material to carry out the pot experiment and the field experiment of the phosphate fertilizer humic acid mixed fertilizer. The results showed that the ratio of superphosphate and humic acid ratio of 1: 5 and 1:10 on soybean, corn have a significant increase yield. Phosphorus 1: 5 can increase the yield of soybean by 34.9%; 1: 10 can increase the yield of corn by 37.6%. The reason for increasing yield is that the appropriate amount of phosphorus can increase the utilization rate of phosphorus by soybean by 4.0-5.7% and increase by 27.2-38.8%, and increase the utilization of maize by 0.7-3.9% and increase by 4.2-23.5%. Humic acid to weaken the fixed phosphate, and promote crop root growth and absorption capacity of the combined effect of the results.