The Effect of Different Sowing Dates on Yield and Characters of Guidan589

[Objective] The aim was to definitude the suitable sowing date of Guidan589,which will provide basis for high-yield cultivation.[Method] There are six sowing date in spring,four sowing date in autumn,The influences of different sowing dates on growth period,yield and yield-related traits of Guidan589 were studied through the field experiment.[Result] Sowing in spring with the sowing date was postponed,the time of sowing date to seeding date and the whole growth period shortens,yield reduce gradually,sowing in autumn,with the sowing date was postponed,the sowing date to seeding date and the whole growth period lengthens,yield increase at first,then reduce,in a short,sowing in Feb.15th-Mar.15th and Aug.1th-15th can acquire high-yield of Guidan589,yield-related traits are better,sowing before Feb.can meet low temperature easily,seeding was effected,sowing after in late Mar.,the whole growth period become shorten obviously,sowing after Sept.due to the low temperature,maize become maturity are difficult,harvest yield is low.[Conclusion] The suitable spring sowing date was Feb.15th to Mar.15th,and the optimal autumn sowing date was between Jul.20th and Aug.15th.These sowing dates can avoid or reduce the seasonal natural disasters and enhance the yield.