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作 者 ：郭峰  万书波  王才斌  吴正锋  郑亚萍

期 刊 ：西北植物学报 2007年 2期

关键词：花生；套种；根；叶；酶活性；

Keywords:peanut, intercropping, root, leaf, enzymatic activity,

摘 要 ：以小麦品种烟农23号"和花生品种花育22号"为材料,研究了大田条件下花生产量形成期套种和清种花生根瘤固氮酶活性及SOD、POD、CAT活性等指标变化情况.结果表明:(1)麦套和清种花生单株根瘤重量和固氮酶活性变化均呈单峰曲线,高峰期分别出现在结荚末期和结荚中期;前者固N能力明显高于后者.(2)花生根系中SOD、POD、CAT活性基本上均是先增后降趋势,但麦套花生后期下降速率明显缓于清种花生;叶片中SOD、POD、CAT活性变化规律性明显不及根系,后期麦套花生SOD、CAT活性高于清种花生,POD则相反.(3)麦套花生根系中可溶性蛋白含量一直较高,而清种花生后期下降较快;麦套花生叶片中可溶性蛋白含量的高峰约出现在结荚中期,清种花生整个结荚期呈下降态势,两者进入饱果期后均趋于稳定.可见麦套花生生育后期根系衰老速率明显迟于清种花生.

Abstract:Activities of nitrogenase,SOD,POD and CAT of intercropped peanut(IP) and pure-planted peanut(PP) during yield-forming stage were studied with wheat cultivar ‘Yannong 23‘ and peanut cultivar ‘Huayu 22‘ in field.The main results were described as follows th

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