摘要： 按L16（4⁵）正交裹设计, 对影响红小豆产量的主要因素——密度、氮肥、磷肥、播期进行了研究。结果表明, 播期、磷肥的增产效果达极显著水平, 密度、氮肥达显著水平。最佳播期6月15～25日, 最佳密度亩保苗7～8千株。在中等肥力土壤上磷素（P₂O₅）亩用量不宜超过6.6kg, 氮素不宜超过3kg。天津地区1988～1990年示范推广面积6万多亩, 增产幅度30～50％。

关键词: 红小豆, 正交试验, 密度, 氮肥, 磷肥, 播期

Abstract: The main yield-influencing factors for red bean, such as density, N fertilizer, P fertilizer, and sowing time, were studied on the Ll6(4⁵) orthogonal table design. Results showed that the yield-increasing effects of sowing time and P fertilizer appl cation were highly significant, while those of density and N fertilizer application were significant. The optimum sowing time ranged from the 15th to 25th of June and the optimum density was 7000-8000 seedlings permu. The amount of P fertilizer application should not exceed 6.6 kg permu while the N application should not exceed 3 kg permu, In Tianjin suburbs, from 1988 to 1990, demonstration and extension of the above results benefited a total of 60 000mu of land and yield was increased by 30-50%.

Key words: Red bean, Ll6(4⁵) orthogonal table, Density, N fertilizer, P fertilizer, Sowing time