Abstract In order to improve the yield of ginseng and realize the objective of green and ecological cultivation of ginseng, the orthogonal test method was used in this study. Bacillus vallismortis SZ-4 is a biocontrol bacterium of ginseng and has the effects of preventing disease and promoting the growth of ginseng. This study inoculated B. vallismortis SZ-4 into corn straw compost and developed the biological organic fertilizer of ginseng by optimizing the conditions of solidstate fermentation. The effect of growth promotion was evaluated by pot experiment. The results indicated that the optimal fermentation condition of solidstate fermentation were as follows: culture time 4 d, inoculation quantity 10%, water content 45%, tossing times 1 time/48 h, culture temperature 32 ℃, urea added to C/N 15. Under these fermentation conditions, the amount of B.vallismortis SZ-4 in the biological organic fertilizer could reach 2.011×109 CFU/g. Pot experiment showed that the biological organic fertilizer treatment (BOF) had better effect on growth promotion than the organic fertilizer treatment (OF) and ck. The fresh weight of ginseng root of BIO treatment was 26.68%-51.09% higher than that of ck treatment from June to August, and 29.29%-66.91% higher than that of OF treatment. The dry weight of ginseng root of BIO treatment was 22.92%-42.29% higher than that of ck treatment, and 4,18%-33.11% higher than that of OF treatment. In summary, the optimization of solid-state fermentation of bio-organic fertilizer can improve its quality greatly, and the bio-organic fertilizer can promote the growth of ginseng.
|