烟渣有机肥对大豆结瘤及生长的影响
- Title:
- Effects of Tobacco Residue Organic Fertilizer on Growth and Nodule Formation of Soybean
- 摘要:
- 为探究烟渣有机肥对大豆结瘤及生长的影响，本研究对大豆接种4种根瘤菌，发现Bradyrhizobium japonicum USDA110是最佳的接种菌株，相较对照组该菌株具有显著的植物促生作用。在相同的试验环境下，设置5个不同的烟渣有机肥水平（0，10.7，21.4，42.9 和 85.7 g·L-1），使用接种了USDA110的大豆进行结瘤试验，以未接种根瘤菌且不施用烟渣有机肥的处理作为空白对照。结果表明：两个高施肥水平的处理（42.9 和 85.7 g·L-1）显著增加了结瘤数量，21.4 g·L-1施肥水平下根瘤生物量、茎叶干重、叶绿素含量和植株总干重均为最高，与不施肥处理组的植株有显著差异。与空白对照组相比，各处理组的植株氮含量增加130.00%~155.47%，磷含量在各处理间没有显著差异，而钾含量随着烟渣有机肥施用量的增加而增加。综上所述，施用烟渣有机肥可以促进大豆结瘤和植株生长，在本试验条件下，施用量21.4 g·L-1为最佳。因此，烟渣有机肥能以环境友好的方式促进大豆生长，未来的研究仍需在田间条件下测试烟渣有机肥和USDA110联合肥料的效应。
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