Effect of different contents of nitrogen application on amino acids in process of wheat seed development

Effect of different contents of nitrogen application (67.5 kg/667 m 2,157.5 kg/667 m 2 and 247.5 kg/667 m 2) on amino acids content in process of Xiao Yan (No.6,107) and hard seed wheat (4286) seed development was studied.The results showed that nitrogen application increased total amino acids content of variety seeds and correlated with those,but had on effect of those on seeds of control.The proportion of essential amino acids and total amino acids of hard seed wheat decreased as contents of nitrogen application increased.Contents of nitrogen application correlated to free amino acid in process of wheat seed development within 32 days after flowering,then content of free amino acid under different levels of nitrogen application trended to nearly same.These indicated that nitrogen application increased pool source of free amino acid.Various gene types of wheat varities respended to levels of nitrogen application differently.Under the same Effect of different contents of nitrogen application(67.5 kg/667 m 2,157.5 kg/667 m 2 and 247.5 kg/667 m 2) on amino acids content in process level of nitrogen application.The orders contents of total and free amino acid were 4286Xiao Yan No.6Xiao Yan No.107 and the highest content of nitrogen applicationthe middle contentthe lowest content.