Influences of Nitrogen Level on Carbon Metabolism of Spring Maize

氮素营养水平对春玉米叶片碳代谢的影响(英文)

[Objective]To study the effect of supplies of nitrogen level on spring maize leaf blade carbon metabolism.[Method]In this experiment,field trail and biochemistry analysis were used to study the effect of the diference-nitrogen level on the content of chlorophyl and carboxylase activity of RuBP and PEP in the leaf of spring maize during main growing period.[Result]Applying proper amount of N could keep relative higher content of chlorophyl and higher activity of carboxylase of RuBP and PEP in the leaf of spring maize,insufficient or excessive（N 400 kg/hm^2） of nitrogenous fertilizer has the adverse effect.[Conclusion]In this experiment,applying 300 kg/hm^2 amount of N could keep relative higher content of chlorophyl and higher activity of carboxylase of RuBP and PEP in the leaf of spring maize during main growing period.It was important to strengthens the leaf blade photosynthesis ability,promote the yield formation and postpone the decline of leaf blade.

[目的]研究供氮水平对春玉米叶片碳代谢的影响。[方法]采用田间试验和室内分析相结合的方法,按春玉米生育期采样,探讨不同供氮水平对春玉米叶片中叶绿素含量及RuBP羧化酶和PEP羧化酶活性的影响。[结果]适宜的供氮水平能使春玉米在各生育期叶片中叶绿素含量及RuBP羧化酶和PEP羧化酶活性均保持最高水平,供氮不足或过量(施N量大于400kg/hm2)均对春玉米叶片碳代谢产生不良影响。[结论]该试验条件下,施N量300kg/hm2,春玉米各生育期叶片中叶绿素含量及碳代谢关键酶的活性均最高,对增强叶片光合能力、促进产量形成、延缓叶片衰老具有重要意义。