磷肥在黑土春玉米连作区玉米后效作用的研究

Studies on Residual Effect of Phosphate Fertilizer to Maize on the Black Soil of the Continuous Cropping System Area

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。

Effect of phosphate fertilizer application and its residues on the yield of maize and the efficient of phosphate fertilizer was analyzed in 12 years long-term and fixed place experiment on the black soil of the continuous cropping system area in the middle region of Jilin province. It was concluded that phosphate fertilizer had residual effect for more than 12 years, whereas the period that it had significant effect was about two years.