依据玉米生长发育进程与最佳季节同步原理，建立了玉米适宜播期确定知识模型。
The knowledge model for suitable sowing time is based on the synchronization between the maize growing process and the suitable season.
本试验采用播期与栽培密度两因素的裂区设计，以确定沙地菊芋种植的较佳密度和适宜播期。
The assay use split plot design on two factors, including the date of seeding and density, to define the better density and most suitable date of seeding on sand Jerusalem artichoke.
因此选择适宜播期、提高渐增期灌浆速率、快增期灌浆速率和平均灌浆速率对提高粒重有重要意义；
The rate of average grain filling, the rate of grain filling during gradual increase stage, and the grain filling rate of rapid increase stage had important contribution on increasing grain weight.
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