净套作下不同基因型大豆光合、固氮特性及产量品质的比较研究

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本试验在净作和套作两种种植模式下,以本地大豆品种B4(贡选1号)和B5(南豆12)为对照,研究了具有特殊结瘤能力的引进大豆品种(系)B1(nts1007)、B2(nod139)及其亲本B3(bragg)在净套作下的农艺性状、光合特性、糖氮代谢以及产量和品质,主要研究结果如下:1.套作条件下大豆主茎高增加,茎粗减小,分枝数和根瘤数降低,引进大豆品种的变幅均明显高于本地品种。净作条件下,引进大豆品种B1和B3生长状况良好,分枝数和根瘤数均显著高于B4和B5,B1表现出了极强的结瘤能力,B2则
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