宁南旱地冬小麦丰产栽培综合农艺措施优化方案的研究

Optimal Scheme of Comprehensive Agronomic Measures for High Yield Winter Wheat Cultivation in Rainfed Area in the South of Ningxia

应用二次回归正交旋转组合设计法，研究了播期、播量、氮肥、磷肥、有机肥与冬小麦产量间的关系，建立了数学模型，通过计算机寻优，得出１７２５ｋｇ／ｈｍ２以上产量水平的农艺措施组合方案。

The relationships of sowing date, sowing density, N, P and organic fertilizers with wheat yields have been studied with combinatingdesign method of the binary universal regression rotations in the experiment zone in the south of Ningxia during 1993～1995, based on which a mathematic model is established. And the optimal conbined scheme of agronomic measures for yields of over 1725 kg/hm 2 is suggested after the computer aided analysis,which would lay a scientific base for the yield increase in winter wheat production in the south of Ningxia rainfed areas.