Growth Promoting Effect of SQR9 Compound Microbial Liquid Fertilizer on Maize and Cabbage

doi:10.11924/j.issn.1000-6850.casb18030090

Abstract

Abstract: [Objective] This study aimed at evaluating the plant growth promotion effect of two different compound microbial liquid fertilizers containing Bacillus amyloliquefaciens SQR9 on maize and cabbage for providing the theoretical and technical base for the popularization and application of the novel products.[Method] Pot experiments were performed with nine treatments: fertigation of water (CK), fertigation of water soluble chemical fertilizer containing 100 g·kg-1 nutrients (CF1), fertigation of water soluble fertilizer containing 100 g·kg-1 nutrients without Bacillus amyloliquefaciens SQR9 (AA1), fertigation of compound microbial liquid fertilizer containing 100 g·kg-1 nutrients and Bacillus amyloliquefaciens SQR9 after 3 months of storage (AAS1-1), fertigation of freshly produced compound microbial liquid fertilizer containing 100 g·kg-1 nutrients and Bacillus amyloliquefaciens SQR9 (AAS1-2); fertigation of water soluble chemical fertilizer containing 200 g·kg-1 nutrients (CF2), fertigation of water soluble fertilizer containing 200 g·kg-1 nutrients without Bacillus amyloliquefaciens SQR9 (AA2), fertigation of compound microbial liquid fertilizer containing 200 g·kg-1 nutrients and Bacillus amyloliquefaciens SQR9 after 3 months of storage (AAS2-1), fertigation of freshly produced compound microbial liquid fertilizer containing 200 g·kg-1 nutrients and Bacillus amyloliquefaciens SQR9(AAS2-2). [Result]Pot experiment results showed regardless of the nutrient amounts, compared with water soluble fertilizer without Bacillus amyloliquefaciens SQR9, water soluble chemical fertilizer and the blank amended with water, the compound microbial liquid fertilizer containing Bacillus amyloliquefaciens SQR9 efficiently promoted maize and cabbage growth by improving their biological characters. No significant difference in the biological characters of maize and cabbage was observed between the water soluble fertilizers containing amino acids and Bacillus amyloliquefaciens SQR9 freshly produced and stored for 3 months; and application of water soluble fertilizer containing functional microbes increased the number of Bacillus in rhizosphere soil. [Conclusion]The compound microbial liquid fertilizer containing Bacillus amyloliquefaciens SQR9 effectively promoted the growth of maize and cabbage by root irrigation.

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