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通过五元二次回归旋转组合设计试验，明确了影响洞庭湖区晚稻生产的主要因素，依次为播种量（X1），2．1叶期喷施效唑（X4）移栽叶龄（X2），分蘖期施纯氮（X5）等，建立了五元二次目标函数模型，提出了适应洞庭湖区一季晚稻和双季晚稻的五套优化综合配套技术，探讨了二因素对产量影响显著的交互效应。
The main factors affecting late rice production in Dongting Lake area were determined by five-element quadratic regressive rotation combination design test. The main factors were sowing rate (X1), 2.1 leaf spraying age (X4), leaf age (X2) Five-element quadratic objective function model was set up at the tillering stage, and five sets of optimized and comprehensive supporting technologies adapted to the first season late rice and the second season late rice in the Dongting Lake area were put forward. The interaction effect of two factors on the yield was discussed .