Study on the Growth Trend of Late Sowed Winter Wheat(Jingdong 8) in Eastern Hebei Province

Combining field experiment with indoor analysis,the growth trend of plants of late sowed high-yield winter wheat(Jingdong 8,8 111.52 kg/hm2) was studied.The results showed that after seedling emergence,the fresh weight and dry weight of the plant continuously increased.They reached their maximum value after 24 d and at maturation time.The fresh weight of the plant increased fastest from jointing stage to flagging stage,reaching 42.13% of the maximum value,while the dry weight increased fastest from flagging stage to blossoming period,reaching 36.73% of the maximum value.After blossom,the fresh weight and dry weight of grain began to gradually increase,reaching its maximum value at maturation time of 51.11% and 50.48% of the maximum value respectively.From seedling stage to flagging stage,dry matters in the plant mainly distributed in leaves and sheathes;from flagging stage to blossoming period,dry matters mainly distributed in the stems.After that,the distribution of dry matters in grain rapidly increased,and until maturation time,the dry matters distributed in the plant mainly stored in grain and stems,which were of 36.93% and 36.86% of the total weight of dry matters in the plant.