CAJ | 학술논문

[目的]探讨不同施氮方法对春玉米生育后期穗位叶酶活性的影响。[方法]采用盆栽方法,测定了春玉米穗位叶超氧化物歧化酶（SOD）活性、过氧化物酶（POD）活性、丙二醛（MDA）和可溶性蛋白含量。[结果]在春玉米灌浆期和蜡熟期增加施氮量,春玉米穗位叶的MDA含量逐渐下降,SOD、POD活性和可溶性蛋白质含量随之提高。施用等量氮肥的条件下,2次追施氮肥的穗位叶MDA含量低于1次追施氮肥的,SOD、POD活性和可溶性蛋白质含量高于1次追施氮肥的。[结论]不同施氮方法对春玉米穗位叶的MDA含量、SOD活性、POD）活性和可溶性蛋白质含量均有较为明显的影响,对防止春玉米早衰具有一定的指导意义。
[목적]탐토불동시담방법대춘옥미생육후기수위협매활성적영향。[방법]채용분재방법,측정료춘옥미수위협초양화물기화매（SOD）활성、과양화물매（POD）활성、병이철（MDA）화가용성단백함량。[결과]재춘옥미관장기화사숙기증가시담량,춘옥미수위협적MDA함량축점하강,SOD、POD활성화가용성단백질함량수지제고。시용등량담비적조건하,2차추시담비적수위협MDA함량저우1차추시담비적,SOD、POD활성화가용성단백질함량고우1차추시담비적。[결론]불동시담방법대춘옥미수위협적MDA함량、SOD활성、POD）활성화가용성단백질함량균유교위명현적영향,대방지춘옥미조쇠구유일정적지도의의。
[Objective] This paper aimed at exploring the effects of different nitrogen application methods on the enzyme activities of leaves at ear position in late growth stage of maize. [Method] By pot experiment, the superoxide dismutase （SOD） activity, peroxidase （POD） activity, malonyl dialdehyde （MDA） content and soluble protein content were determined. [Result] At the filling stage and ripening stage, with the increasing of nitrogen application rate, MDA content gradually decreased, while SOD activity, POD activity and soluble protein content increased. MDA content with two topdressing nitrogen was lower than that with one top dressing nitrogen at the same nitrogen application rate, while SOD activity, POD activity and soluble protein content with two topdressing nitrogen were higher than that with one topdressing nitrogen. [Conclusion] Different nitrogen application methods have relatively significant effects on the MDA content, SOD activity, POD activity and soluble protein content, which is of certain directive significance for preventing spring maize prematuration.