Relationship Between Seed Harvest Period and Seed Vigoron Maize in Liaoning Seed Production Area
A maize production experiment was carried out with the dent maize hybrids Zhengdan958(Zheng58/Cang7-2),Liaodan565(Zhong106/Liao3162) and the flint maize hybrids Xianyu335(Ph6wc/Ph4cv) in Liaoning province from 2013 to 2015.Taken samples every 3 days started from 35 days after pollination.To evaluate the seed vigor,we compared the kernel moisture,100-seed weight,standard germination tests,accelerated aging germination,cold test and field investigations with the three different breeds and different maturation stages.The result indicated that the suitable harvest period for high vigor seed of Liaodan565 was 44-53 days after pollination,zhengdan958 was 47-56 days after pollination,and Xianyu335 was 44-56 days after pollination in the Liaoning seed production area.About 10 days before usual harvesting to prevent frost damage on seed quality in Liaoning.