根瘤菌及组合菌对大豆叶部性状、干物质积累及产量的影响

为了探讨不同根瘤菌剂的施用效果，以‘合丰55号’大豆为材料，在大田条件下研究根瘤菌及组合菌对大豆叶部性状、干物质积累及产量的影响。结果表明：根瘤菌及组合菌施用能够提高大豆不同生育期株高、叶面积指数、SPAD、干物质积累和根瘤数，显著增加产量。与对照相比，株高分别提高8.4%和10.0%；叶面积指数分别提高47.1%和41.2%；叶片SPAD值分别提高8.4%和11.1%；植株干重分别提高43.0%和60.7%，单株根瘤数分别提高44.0%和50.5%，差异达到显著水平。根瘤菌及组合菌施用能够显著提高大豆产量，与对照相比分别提高18.3%和27.7%。综合以上分析，大豆施用组合菌处理效果最好。

Effects of Rhizobial and Combination Bacteria on Leaf Character,Dry Matter Accumulation and Yield of Soybean

In order to explore the application effect of different rhizobia agents, in this paper, the effects of rhizobial and combination bacteria on leaf character, dry matter accumulation and yield of soybean were studied under field condition and with soybean ‘Hefeng 55’ as the material. The results showed that the rhizoidal and combination bacteria could improve soybean plant height, leaf area index, SPAD, dry matter accumulation and nodule number at different development stages. The rhizoidal and combination bacteria could also significantly increase the yield. Compared with the controls, plant height increased by 8.4% and 10.0% respectively; leaf area index increased by 47.1% and 41.2% respectively; leaf SPAD-value increased by 8.4% and 11.1% respectively; plant dry weight increased by 43.0% and 60.7% respectively, the nodule numbers increased by 44.0% and 50.5% respectively, and the difference reached significance level. Compared with the controls, rhizobia and combination bacteria could significantly increase the soybean yield by 18.3% and 27.7% respectively. On the basis of the above analysis, the effect of combination bacteria treatment was the best.