中文摘要：

采用液培法，进行了不同基因型甜菜无机磷吸收动力学参数研究，结果表明：（1）甜菜对营养液中无机磷的吸收速率符合Michaelis—Menten动力学方程，可以用该方程的线性转换式Lineweaver—Burk或Hanes方程加以描述；（2）磷营养水平对各品种的无机磷吸收动力学参数影响较大，与胁迫时比，足磷条件下明显增加Ⅰmax（最大吸收速率）和Km（米氏常数）值，其中Ⅰmax增加2—10倍左右，Km增加23—60倍左右；（3）在磷胁迫条件下，三个参试品种的Km值以品种20最小、品种14居中、品种17最高，与品种的抗磷胁迫能力基本相符。

英文摘要：

Studies on the kinetics of phosphorus uptake in different sugar beet genotypes were conducted by means of liquid culture,the results showed that： ①the inflow of phosphorus uptake in sugar beet was generally in accord with the function of Michaelis - Menten;②the dynamic functions of Michaelis - Menten for phosphorus uptake in all sugar beet genotypes used in the study could be transferred and fitted by the methods of Lineweaver- Burk or Hanes;③comparer with phosphorus stress, sufficient phosphorus could increase Ⅰmax and Km significantly;④ the dynamic parameters of phosphorus in sugar beet showed a genetic differences greatly,and generally in accord with the resistances to phosphorus stress.