Search

In order to reveal the effects of reducing the amount of novel nano-carbon humic acid water-retaining fertilizer (CSF) on soil microbial community structure and citrus groWh. [Method] In this study, conventional fertilization was as the control (KC1) in Wanzhou citrus orchard of Three Gorges Reservoir area. CSF reductions by 0% (KC2), 10% (KC3), 20% (KC4), 30% (KC5) and 40% (KC6) were used to analyze the changes of soil bacterial community structure, citrus yield and quality. [Result] The results showed that the observed species, Shannon index, Chao1 index and PD_whole_tree of KC6 were higher than those of KC1, and were the same as KC2. The abundance of Xanthomonadaceae was the highest in KC5. Compared with KC1, the Xanthomonadaceae in KC3, KC4 and KC6 was significantly decreased, and the levels of Nitrosomonadaceae and Pseudomonasaceae were higher than that of KC1 after the treatment of KC6. Sphingomonas in different reduction treatments was lower than that of KC1, but Burkholderia and Pseudomonas were significantly higher than those of KC1. It was found that the similarity among treatments was small after bacterial community similarity clustering analysis, and citrus yield increased somewhat after CSF fertilization reduction. When CSF fertilization reduced by 30%, citr [ABSTRACT FROM AUTHOR]