Screening of high-efficiency nitrogen-fixing bacteria from the traditional Chinese medicine plant Astragalus mongolicus and its effect on plant growth promotion and bacterial communities in the rhizosphere

Table 5 Physiological and biochemical identification of 8 strains of nitrogen-fixing bacteria

Strain	Source	Acidogenesis of litmus milk	Beef peptone medium	3-keto lactose reaction	Catalase test	V-P	41℃	2%NaCl	Esterase reaction	BTB	Amylase reaction	Citrate test
G4	Nodule	-	-	-	+	+	+	+	-	-	+	+
J1	Nodule	-	-	-	+	+	+	+	-	-	+	+
H7	Nodule	-	-	-	-	+	+	+	-	-	+	+
J2	soil	-	-	-	-	+	+	+	-	-	+	+
H3	soil	-	-	-	+	-	+	+	-	-	+	+
H13	soil	-	-	-	-	+	+	+	-	-	+	+
H16	soil	-	-	-	+	-	+	+	-	-	-	+
H20	soil	-	-	-	-	+	+	+	-	-	+	+

ISSN: 1471-2180