微生物菌肥对盐渍土壤微生物区系和食葵产量的影响

在内蒙古五原县,以食葵LD5009为供试作物,通过大田试验,研究了不同微生物菌肥产品（包括丹路牌微生物菌肥和丹路牌微生物菌剂）对盐渍土壤微生物、土壤含盐量及食葵产量的影响。结果表明：（1）施用不同产品可降低0～40cm土层盐分含量;（2）施用不同产品可改善土壤微生态系统,促进土壤微生物繁殖,提高细菌和放线菌的数目,并提高细菌优势菌多样性,且不同产品处理均广泛分布有芽孢杆菌属和假单胞菌属细菌;（3）施用不同产品可极显著提高食葵产量,产量表现为菌剂与无机肥配施〉单施菌肥〉单施无机肥,菌剂配施化肥处理增产可达107.62%;（4）单施菌肥对土壤微生态系统的作用效果较优,但其增产、抑盐效果均不如菌剂配施无机肥处理,不能完全代替化肥产品。

Effects of Microbial Fertilizer on Soil Microflora and Sunflower Yield in Saline Soil

In order to study the effects of different microbial fertilizers on the soil microorganism and sunflower yield,field experiments were conducted in saline soil on Wuyuan country in Inner Mongolia using sunflower LD5009 as the tested material.The results showed that the soil salinity content of 0～40 cm layer dramatically decreased by applying the microbial fertilizer.In additional,applying microbial fertilizer improved the soil physiochemical properties,and significantly increased the amount of bacteria and actinomycetes.Diversity of predominant bacteria indicated that the Bacillus and Pseudomonas existed widely on the different microbial fertilizer treatments.Meanwhile,utilizing the microbial fertilizer increased the sunflower yield.As a result,the bacterial inoculants with chemical fertilizer treatment produced a maximum yield,followed by microorganism fertilizer only and chemical fertilizer only treatment,and the yield of bacterial inoculants with chemical fertilizer treatment increased by 107.62% compared to the chemical fertilizer only.Applying inoculating microbial fertilizer could maintain the balance of micro-ecological system,but it was insufficient on reducing soil salinity content and increasing the yield.Consequently,it could not replace the role of chemical fertilizer completely on farming.