Effects of microalgal biomass as biofertilizer on the growth of cucumber and microbial communities in the cucumber rhizosphere
Effects of microalgal biomass as biofertilizer on the growth of cucumber and microbial communities in the cucumber rhizosphere
In the present study, microalgal biomass (Anabeana circinalis and Scenedesmus quadricauda) was used as biofertilizer incucumber cultivation. The response of cucumber growth characters to microalgal biofertilizer was evaluated. Moreover, rhizospheremicrobial diversity and community composition of cucumber was analyzed through 16S rRNA high-throughput Illumina sequencingdata. The results showed that microalgal biomass as biofertilizer significantly promoted height, number of leaves and flower buds,and stem diameter of cucumber. The application of a high concentration of S. quadricauda to soil raised the diversity of rhizospherefungi of cucumber. The rhizosphere microbial community of cucumber also responded to microalgal biofertilizer. The most abundantbacterial phylum in all samples was Proteobacteria. Acidobacteria, Actinobacteria, and Gemmatimonadetes were also highly abundant inall samples. Ascomycota was the most predominant fungal phylum in all samples. Zygomycota was the dominant phylum in the control,whereas Basidiomycota was dominant in all treatments. At the genus level, both growth-promoting bacteria and fungi (Azotobacter,Bacillus, Pseudomonas, Cryptococcus, Fusarium, Penicillium, and Trichoderma) from the rhizosphere of cucumber were enhanced in alltreatments after the application of microalgae fertilizer. All results indica
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