氮和乙烯利处理对夏玉米籽粒中氮代谢生理特性的影响

he organic combination of Nitrogen (N) fertilization and the chemical control technology is one of the important measures for maize high-yield cultivation, but studies of the regulation of grain nitrogen metabolism were rarely reported. Under field conditions, the study used summer maize Zhengdan 958 (ZD 958) as material to study the regulation of N and ethephon on N accumulation and N metabolism physiological characters of kernels development. The results showed that the total nitrogen and amino acids components of the harvest kernels represent a rising trend with the increase of N level, but ethephon had little effect on total nitrogen and amino acids components. Compared with other N (N0、N75、N225) treatments, at maize jointing stage, spraying eyhephon of 400ppm under N150 could significantly improve the activity of alanine amino transferase (ALT)、glutamine synthetase (GS) and total nitrogen content of kernels at 10 days after silking, but which had no effect on the relevant indicators of kernels at 34 days after silking. Thus, at maize jointing stage, spraying eyhephon of 400ppm under N150 could significantly improve the N metabolism activity of kernels at 10 days after silking, but which had little effect on N metabolism at late filling stage.