汕优桂34晚稻高产栽培数学模型研究

Studies on High-yielding Cultural Mathematical Models for Late Hybrid Rice Shanyou Gui 34

根据系统工程“最佳模拟配合法”的要求，采用二次正交旋转组合试验设计研究了播种期，插植密度，氮、磷、钾肥施用量等５项农艺措施对产量的综合作用。建立了各因素与产量之间的数学模型，获得了杂交晚稻组合汕优桂３４在广西象州高产栽培的综合农艺措施优化组合方案。

Five factors, i.e., seeding date (x 1), transplanting density (x 2), the amount of applied nitrogen (x 3), phosphorate (x 4) and potassium (x 5), were chosen to study on their main effects and interactions on grain yield in the cultivation of late hybrid rice Shanyou Gui 34, using quadratic orthogonal rotating combinatorial design. The optimal integrated cultural practices to obtain a yield of 6 t/hm 2 or higher for Shanyou Gui 34 at Xiangzhou, Guangxi were found to be seeding on July 13, transplanting 345 000 hills/hm 2, applying 152.3 kg/hm 2 pure nitrogen, 86.4 kg/hm 2 P 2O 5 and 148.7 kg/hm 2 K 2O. Such practices could also be suitable for hybrid rices with similar maturity of Shanyou Gui 34.