Dominant protozoan species in rhizosphere soil over growth of Beta vulgaris L. in Northeast China

Abstract

This paper identified the dominant protozoan species in the four layers of rhizosphere soil during the six growth stages of Beta vulgaris L. and analyzed the correlations of the abundance and diversity of the dominant protozoan species with soil properties at different growth stages and soil depth. A total of 15 species of protozoa were identified; among them, Colpoda sp., Bodo sp., two kinds of Oxytricha sp., and Tachysoma sp. were the most dominant species of Beta vulgaris L. rhizosphere soil. The Colpoda sp. was eurytopic species in the Beta vulgaris L. rhizosphere soil and Tachysoma sp., Vorticella sp., Colpoda sp., Oxytricha sp.1, and Oxytricha sp. 2 were noted closely related to the acceleration function of circulation of N and P elements in soils. These dominant protozoan species were proposed to play a significant role of fertilization on N supply in rhizosphere soil during the initial growth of Beta vulgaris L.

Fungicides alter the distribution and diversity of bacterial and fungal communities in ginseng fields

“…The most abundant Proteobacteria was not surprising due to its high adaptability to unfavorable environments and dominant in carbon/nitrogen cycling [ 8 , 18 ]. The favorable habitat to Proteobacteria than Acidobacterium caused prevailing existence of Pseudomonas leading to adverse interference or disease on plant development [ 10 , 19 ]. Thus, the obvious degenerate tendency of Proteobacteria abundance after applying fungicides in this study revealed the positive effect of fungicide on beneficial microbial.…”