Effects of organic fertilizer with antagonistic bacteria on strawberry in continuous cropping greenhouse

Mycelium growth in plate, soil treatment in artificial climate chest, pot and field experiments were carried out to study inhibition effect of liquid fertilizer(LF) resulted from liquid fermentation with composted herbal residue on soil-borne plant pathogens of strawberry, Fusarium axysporum f．sp. fragariae fluctuation in soil, bio-control of strawberry diseases in the pot experiment, and on strawberry growth in greenhouse. The results show that there are growth inhibition effects on two plant pathogens in the plates under both no-fortified and fortified LFs with antagonistic bacteria, and the inhibition effects are lost in the three kinds of LFs after the Co 60 radiation. Propagation of Fusarium axysporum f．sp．fragariae in soil is restrained strongly after soils are treated with two fortified liquid fertilizers for 1015 days separately. Compared with that of no-radiated LF, the no-fortified liquid fertilizer, even after being radiated by Co60, still has growth inhibition effects, but inhibition rate is decreased. Biocontrol effects of strawberry fusarium wilt of the two fortified liquid fertilizers are higher than those of the no-fortified fertilizer in the pot test. The field experiment of the application of three LFs on strawberry for soil-borne disease suppression was conducted in the plastic greenhouse. The results show that the strawberry fruit yields of the LFs treatments are significantly higher than that of the control, while the disease incidences are obviously lower than that of the control. The biocontrol effects of LFs fortified with two different antagonistic bacteria separately are better than those of the no-fortified LFs. The effect of LF fortified with antagonistic bacteria2 is better than that of LF fortified with antagonistic bacteria1. The application of LFs appears effective remediation on soil acidification and salt accumulation in strawberry rhizosphere. The strawberry yields of LF the treatments are increased by 93110% since the LF treatments reduce the disease incidences significantly. The malformed fruit rate is reduced by23.5% in the treatment of LF, and the fruit quality is improved. Biocontrol effects of fortified LF with antagonistic bacteria on strawberry growth in greenhouse are increased significantly.