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穗数是构成三麦产量的主导因素,当前郊区三麦每亩穗数约有80～90%来自于主茎和冬前分蘖。要实现穗多、穗大高产,必须在足苗的基础上,培育壮苗。但郊区以晚茬麦为主,收种集中,土壤粘湿,整地困难,播种质量较差,尤其在多雨年份,往往出现湿耕烂种,迟播与早发的矛盾突出。如果管理跟不上,冬前就不能形成壮苗。冬发不足,根系发育不良,成穗率低,产量不高。因此,
The number of spikes is the dominant factor in the production of three wheat. At present, about 80-90% of the spikes of three wheat per mu in the suburbs come from the main stem and tillering before winter. Spike to achieve more, spike large yield, must be based on sufficient seedlings, nurturing strong seedlings. However, the main crops are wheat, which is mainly wheat. The crops are mainly concentrated in the suburbs. The crops are concentrated, the soil is sticky, soil preparation is difficult, and the planting quality is poor. Especially in the wet years, wet cultivation is frequent and rotten, and the late-sowing and early-onset contradictions are prominent. If the management can not keep up, can not form strong seedlings before winter. Lack of winter hair, poor root growth, low ear yield, yield is not high. therefore,