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用二次回归正交旋转组合设计,研究了再生稻综合农艺措施对产量的影响,建立了相应数学模型,得出了最佳农艺措施组合方案。即在重庆地区,再生稻用促芽氮肥145.16—157.52kg/ha,于头季稻齐穗后22—24天施,头季稻齐穗后15天配施磷钾99.95—108.11kg/ha,留桩高度24—28cm,发苗肥48.34—57.58kg/ha,再生稻产量可达1890kg/ha以上。
By quadratic regression orthogonal rotation combination design, the effect of comprehensive agronomic measures of ratoon rice on yield was studied, and the corresponding mathematical model was established, and the combination plan of the best agronomic measures was obtained. That is to say, in Chongqing, 145.16-157.52kg / ha for promoting shoots was used for ratooning rice, 22 to 24 days after heading stage, and 15.95 days for first crop after heading stage, with phosphorus and potassium 99.95-108.11kg / ha, The pile height of 24-28cm, hair seedling fertilizer 48.34-57.58kg / ha, ratooning rice output up to 1890kg / ha above.