【摘要】 试验采用两因素重复D -饱合设计 ,N、P2 O5 施用量分别在 0～ 1 8kg/亩和 0～ 2 9 57kg/亩的条件下 ,探讨甜菜生长动态、甜菜的产质量构成及其与氮磷营养关系。结果表明 ,较高产量的块根生长特征表现为前快后缓型。高施N需较高施P2 O5 配合 ,促进块根产量提高 ,但使含糖率降低 ,较低的施N配合较高施P2 O5 ,使含糖率提高。在黑土区 ,施N8kg/亩、P2 O5 1 0kg/亩时 ,在轻盐碱土区 ,施N1 2kg/亩、P2 O5 1 8kg/亩时 ,甜菜获得较高的产质量。更多还原

【Abstract】 This paper adopted saturated D-optimal design with two factors.The applied amounts for N and P 2O 5 are 0～18kg/666.7m 2 and 0～29 7kg/666.7m 2 respectively.It inquired sugar beet dynamic growth,formation of yield and quality as well as relation with nitrogen and phosphorus nutrients.The results showed that characteristic feature of sugarbeet root growth appears as growth fast in the initial stage and slow in the late,and yield of sugarbeet root is higher.It can promote sugarbeet root yield increment as applied N amount more than P 2O 5 amount cooperation,but sugar content decrease.In the black earth areas applied N amount 8kg/666.7m 2 and P 2O 5 10kg/666.7m 2,and in the light saline-alkali areas applied N amount 12 kg/666.7m 2 and P 2O 5 18kg/666.7m 2, it can get higher root yield and quality of sugarbeet.更多还原