长武县小麦历年产量低而不稳,播期过早过晚是个主要原因。为了提高单产,根据品种生态型、肥力、密度等因素探讨确定适宜播期的方法。材料和方法1977、1980年用正交设计;1982—1984年年用复因子设计。品种为:强冬中蘖高产型7125,强冬多蘖稳产型7118,冬性多蘖稳产型722,冬性少蘖大穗高产型404、秦麦4号。施肥水平;不施肥;N 4.1kg,P_2O_5 3.4kg;N Changwu County wheat yield is low and unstable over the years, sowing too early is a major reason. In order to improve yield, according to the variety of ecological type, fertility, density and other factors to determine the appropriate sowing method. Materials and Methods 1977, 1980 with orthogonal design; 1982-1984 year with complex factor design. Varieties: high winter tiller 7125, winter strong tiller 7118, winter stable tiller 722, winter less tiller big ears 404, Qinmai 4. Fertilization level; no fertilization; N 4.1kg, P_2O_5 3.4kg; N.