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Arid Land Geography ›› 2024, Vol. 47 ›› Issue (3): 413-423.doi: 10.12118/j.issn.1000-6060.2023.431

• Biology and Pedology • Previous Articles     Next Articles

Effects of ridge mulching and rain harvesting patterns on microbial diversity in maize rhizosphere soil

GAO Yanting1(), ZHANG Rui1(), DONG Bo2, LI Qingqing1, LIU Kehan1   

  1. 1. College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou 730070, Gansu, China
    2. Gansu Academy of Agricultural Sciences, Lanzhou 730070, Gansu, China
  • Received:2023-08-16 Revised:2023-10-23 Online:2024-03-25 Published:2024-03-29
  • Contact: ZHANG Rui E-mail:152140111767@163.com;zhr_1029@163.com

Abstract:

This study used Dengyi No. 2 maize as the experimental material to assess the effects of furrow cover rainfall collection mode on the microbial community structure and diversity of maize rhizosphere soil. A single-factor completely-randomized experimental design was adopted, and conventional plain planting without mulching was used as the control (CK). Soil microbial community composition and diversity were analyzed using Illumina high-flux sequencing technology. Six treatments comprising ridges covered with the following were set: ordinary black mulch (HL), liquid mulch (YL), straw (NJ), liquid mulch (YJ), and ordinary black mulch (HJ). The results showed that: (1) The rain-harvesting mode of ridge and furrow mulching was beneficial in increasing corn yield and water use efficiency. Among the six treatments, the number of rows per ear, 1000-grain weight, yield, and water use efficiency of treated HJ were the highest: 11.22%, 31.31%, 88.02%, and 79.83% higher than that of control CK, respectively. There were significant differences between the NJ treatment and CK (P<0.05); however, the yield and water use efficiency of NJ treatment were lower than those of the CK treatment. (2) Each treatment of ridge and furrow mulching except for NJ significantly increased microbial community diversity and changed the microbial structure. (3) The microbial community composition of each treatment was affected by the precipitation harvesting mode at the phyla and class levels. The main bacterial phyla in the soil microbial community were discovered to be Proteobacteria, Acidobacteria, Gemmatimonadetes, and Bacteroidetes. The main dominant Bacteroidia were Gammaproteobacteria (25.8%), Bacteroidia (8.4%), and Alphaproteobacteria (7.7%). Therefore, ridge mulching can improve soil microbial richness, diversity, and evenness index. In other words, the corrugation and rain-harvesting modes can change the structure and composition of the soil microbial at the phyla and class levels to increase corn yield.

Key words: furrow cover rainfall collection, maize, soil microbial community, cover