芽孢杆菌接种剂量对花棒和柠条幼苗生长的影响

[Objective]Bacillus fungicides can effectively improve the wind erosion resistance and properties of soil by forming soil microbial film,but its effect on the vegetation restoration in the wind-sand areas is still unclear.[Method]In view of this,a pot experiment was conducted in this study to analyze the effects of soil microbial film produced by Bacillus mixtures fungicides at different application rates(0,1,3,5,7,10 g/kg)and application methods(spraying,mixing)on the photosynthesis and fluorescence characteristics of seedlings of the typical sand plants Corethrodendron scoparium and Caragana korshinskii.[Result]The results show that the Bacillus fungicides could effectively cement and improve the wind-sand soil,so that the thickness and hardness of the soil consolidation layer increased by 32.23％-131.11％and 79.94％-138.22％compared to that without fungicide application,and the content of soil urease and sucrase were significantly increased which could improve the nature of sandy soil while preventing wind and fixing sand;the Bacillus fungicides could produce an increased promotion of photosynthesis and fluorescence characteristics of the plants with the increase of the fungicide application rate when the application rate of the fungicide was from 1 to 3 g/kg,and the promotional effect would be reduced with the increase of the application rate from 3 to 10 g/kg;the optimal application rates were 3 g/kg and 1 g/kg in the case of the C.scoparium and C.intermedia.Respectively,the effects of different application methods were not significant.[Conclusion]The study showed that the soil microbial film Bacillus fungicides produced by the application of appropriate amount of Bacillus fungicides could promote the growth of C.scoparium and C.intermedia seeding.