小麦灌浆后期，植株逐渐衰老，旗叶中超氧化物歧化酶（ＳＯＤ）活性下降，脂质过氧化产物丙二醛（ＭＤＡ）积累［１］，叶绿素及蛋白质逐渐分解。经抗坏血酸、苯甲酸、水杨酸、丹宁酸、琥珀酸等有机酸及硼、锌处理后，均不同程度地减缓了叶片中ＳＯＤ活性下降和脂质过氧化产物的积累，延缓叶片衰老，具有增加粒重提高产量的效果。 At the later stage of wheat filling, the plants gradually became senescent, the activities of superoxide dismutase (SOD) in flag leaves decreased, the accumulation of malondialdehyde (MDA), a lipid peroxidation product, gradually decreased and the chlorophyll and protein gradually decomposed. After treatment with organic acids such as ascorbic acid, benzoic acid, salicylic acid, tannic acid and succinic acid and boron and zinc, the activity of SOD and the accumulation of lipid peroxidation in the leaves were slowed to some extent, With the increase of grain weight to increase the yield effect.