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通过对吉林省中部中等肥力黑土春玉米连作区,连续13年施磷和残留在土壤中的磷对玉米产量、磷肥的利用率以及二者对玉米增产增收影响的分析比较,得出磷肥对玉米具有12年的后效作用,但后效生统显著时期约为两年。
By comparing the fertility of middle-fertile black soil spring maize continuous cropping area in central Jilin Province for 13 consecutive years with phosphorus and residual phosphorus in the soil, the effect of phosphorus on maize yield, phosphorus utilization rate and their impact on corn yield and income were analyzed. Has a 12-year aftereffect, but the aftermath of the remarkable period of about two years.