Composite lactobacillus agent for improving grape quality and preparation method of composite lactobacillus agent

The invention provides a composite lactobacillus agent for improving grape quality and a preparation method of the composite lactobacillus agent, and belongs to the field of application of microorganisms. The composite lactobacillus agent consists of Lactobacillus plantarum P-8, Lactobacillus casei Zhang and Lactobacillus delbrueckii subsp.bulgaricus in a ratio of (1.5-2):(1.5-2):(1-1.5); the total viable count of the composite lactobacillus agent is 2.4-3.2*10 cfu/ml. Compounding of the three types of bacteria has a significant effect of promoting growth and metabolism of grapes, and particularly can synergistically increase the total soluble sugar content and the soluble solid content of the grapes, so that the grape quality is improved and planting benefits are enhanced. 本发明提供了种用于提升葡萄品质的复合乳酸菌菌剂及其制备方法，属于微生物应用领域。该复合乳酸菌菌剂由植物乳杆菌(Lactobacillus plantarum)P-8、干酪乳杆菌(Lactobacillus casei)Zhang和德氏乳杆菌保加利亚亚种(Lactobacillus delbrueckii subsp.bulgaricus)按(1.5-2):(1.5-2):(1-1.5)的比例组成，所述复合乳酸菌菌剂的活菌总数含量2.4-3.2×10cfu/ml。这三种菌的复