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本试验在土壤碱解N 138mg／kg土、速效P2O5 31．5mg／kg土、速效K（K2O） 100．20mg／kg土，N、P种肥施用量采用两因素重复D－饱合设计（12区），N、P2O5施用量分别在0～270kg／hm2和0～443．55kg／hm2的条件下，探讨甜菜生长动态，用Logistic生长方程描述块根鲜重的增长过程，以二次多项式拟合叶丛鲜重的变化，12个小区的分析结果表明：块根产量与CR1、CR2、CR3、D2、T2、y＇max、Mmax、b1 8个参数呈显著正相关，与D3、TT、2b2显著负相关；产糖量与GR1、GR3、D2、T、T2、b16个参数显著正相关，与D3、TT、2b2显著负相关；含糖率与D1、D2、T呈较明显的正相关，与CR2、D3、y＇max、Mmax、TT、b1呈较明显的负相关。甜菜块根产量、 含糖率、 产糖量与N、P施用量呈显著的二次回归关系。在黑土低糖病区， 施N 120kg／hm2、P2O5 210kg／hm2，获得较高的根产量（32．32～34．39t／hm2）和产糖量（3．941t／hm2），施N 90kg／hm2、P2O5 225kg／hm2，获得较高的含糖率（13．22％），高糖地区含糖率达到（16．9％以上）。在轻盐碱地甜菜低糖区，施N 150kg／hm2、P2O5 280kg／hm2，获得较高的根产量（39．00t／hm2）、产糖量（4．606t／hm2）和含糖率（11．81％），高糖地区含糖率达到（16．9％以上）。
In this experiment, two factors D-saturation design was used to determine the amount of N and P fertilizers applied in soil with N 138mg / kg soil available, P2O5 31.5mg / kg soil available, K2O (K2O) 100.20mg / kg soil, 12 zone), N and P2O5 application rates were 0 ~ 270kg / hm2 and 0 ~ 443.55kg / hm2, respectively. The growth of sugar beet was described by logistic growth equation. The quadratic polynomial The results of 12 plots showed that there was a significant positive correlation between tuber yield and the parameters of CR1, CR2, CR3, D2, T2, y’max, Mmax and b1, but not with D3, TT, 2b2 (P <0.05). There was a significant negative correlation between the amount of sugar production and the parameters of GR1, GR3, D2, T, T2, b16 and negative correlation with D3, TT and 2b2 , And CR2, D3, y’max, Mmax, TT, b1 showed a significant negative correlation. Beet root yield, sugar content, sugar yield and N, P application showed a significant quadratic regression relationship. In the black soil low sugar area, N 120 kg / hm2 and P2O5 210 kg / hm2, higher root yield (32.32 ~ 34.39t / hm2) and sugar yield (3.941t / hm2) hm2, P2O5 225kg / hm2, higher sugar content (13.22%) and high sugar content (16.9%). The yield of sugar (4.606t / hm2) and the sugar content (11.81%) were higher in the light sugar beet low sugar area with N 150kg / hm2 and P2O5 280kg / hm2 %), Sugar content in high sugar areas (16.9% or more).