摘要： 应用二次旋转设计，研究了大同盆地盐碱地甜菜覆膜和露地栽培中的5项主要因素。结果表明：①影响甜菜产量的因素重要性顺序为，施氮量>施磷量>密度>微肥用量>追肥比例。②密度与施氮量，施氮量与施磷量的因素配合对甜菜产量有明显的正的交互作用。③覆膜甜菜产量高于露地甜菜产量，但增加投肥量可部分地补偿两者的差异。④试验得到的产量函数模型、平均优化方案及不同产量水平的栽培方案可在类似生产条件下推广应用。

关键词: 甜菜, 二次旋转设计, 数学模型, 盐碱地农艺措施

Abstract: Five main agronomic measures for sugarbeet in the open field and the film-covered field were studied in saline alkali soil of Datong Basin by using quadratic rotation design. The results indicated:1. The order of 5 factors of agronomic measures contributing to yield was amount of nitrogen applied >amount of phosphorus applied >density >amount of trace fertilizers >rate of natrogen added.2. Density x nitrogen and nitrogen x phosphorus expressed the positive interactive effects for sugarbeet yield.3. The yield of sugarbeet in the field covered with film was higher than that in the open field. Nevertheless, there was no significant difference in the benefit between the two treatments4. The mathematical models, the comprehensive cultural practices for various yield levels and optimum synthetic measures of sugarbeet could be popularized and used in similar agricultural conditions.

Key words: Sugarbeet, Agronomic measures, Quadratic rotation design, Mathematical model, Saline-alkali soil