磷对作物开花结实以及作物体内物质的运转有积极促进作用.但过磷酸钙中的磷素施入土壤后(?)被固定,作物根系不能充分吸收利用.因此,一九六五年各样板场试验了根外喷磷的效果.莫索湾二场用1—3%浓度的过磷酸钙溶液,在棉花现蕾——开花期喷洒叶面,每亩喷溶液100斤,效果良好:株高比未喷磷的相对增长2.55—4.37厘米,单株蕾铃增加4.13—7.62个,成铃数相对增加0.75—1.07个,脱落率降低60.8—82.73%. Phosphorus on the flowering and fruiting crops and the operation of the material in the body of a positive role in promoting, but after the application of phosphorus in the superphosphate soil (?) Is fixed, crop roots can not be fully absorbed .Therefore, 1965 model Field trial of the effect of phosphorus on the outside of the field.Mosowo Bay 2 with 1-3% concentration of superphosphate solution, the bud in the budding - flowering period of cotton leaf spraying, spray per acre 100 kg, the effect is good: strain The relative growth of non-sprayed phosphorus was 2.55-4.37 cm, and the number of bolls per plant increased 4.13-7.62. The number of adult bolls increased 0.75-1.07 and the rate of shedding decreased by 60.8-82.73%.