Long-term intercropping shaped soil bacterial microbiome composition and structure of maize fields in a semiarid region

IF 6.1 1区农林科学 Q1 SOIL SCIENCE

Soil & Tillage Research Pub Date : 2024-11-29 DOI:10.1016/j.still.2024.106383

Xinnian Guo , Zhuonan Hou , Xia Wu , Wenzu Liu , Jinjun Cai , Shaoshan An

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引用次数: 0

Abstract

Intercropping has gained attention for its potential to enhance soil health and increase crop yields in agroecosystems, in which soil microbial community play a key regulatory role. Bacteria is critical for a variety of soil biological processes, so promoting the understanding of soil microbiome within bacteria can improve the agricultural management practices. Here, the responses of soil bacterial community composition, functions, and assembly to long-term intercropping were assessed using 16S rRNA gene sequencing in the mountainous area of Southern Ningxia, spanning approximately 10 years until summer 2022. The experiment comprised three field treatments: maize monoculture (MM), intercropping of maize and potato (MP) and intercropping of maize and soybean (MS). The results showed that intercropping altered the relative abundance of major phyla and genera, and life-history strategies, mainly influenced by microbial biomass carbon and enzyme activities. The ratio of K- to r-strategy bacteria showed a trend of MP (0.77) > MM (0.76)> MS (0.56). Soil bacterial community structure of MP and MS was significantly different and similar to that of MM, respectively. Bugbase and PICRUSt2 analysis predicted the phenotype and metabolic pathways of soil bacterial community in maize fields, revealing that maize-legume intercropping increased the oxygen tolerance of soil bacteria. Moreover, intercropping enhanced the co-occurrence network complexity and the roles of homogeneous selection and drift, while bacterial community assembly was mainly driven by stochastic processes in MM (62.32 %), MP (60.68 %), and MS (59.17 %) soils. A variety of complex factors strongly governed bacterial community and assembly processes, such as soil nutrient elements and moisture. In brief, the study revealed the effect of intercropping on soil bacterial community, contributing to the further understanding of agricultural management practices.

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来源期刊

Soil & Tillage Research 农林科学-土壤科学

CiteScore

13.00

自引率

6.20%

发文量

266

审稿时长

5 months

期刊介绍： Soil & Tillage Research examines the physical, chemical and biological changes in the soil caused by tillage and field traffic. Manuscripts will be considered on aspects of soil science, physics, technology, mechanization and applied engineering for a sustainable balance among productivity, environmental quality and profitability. The following are examples of suitable topics within the scope of the journal of Soil and Tillage Research: The agricultural and biosystems engineering associated with tillage (including no-tillage, reduced-tillage and direct drilling), irrigation and drainage, crops and crop rotations, fertilization, rehabilitation of mine spoils and processes used to modify soils. Soil change effects on establishment and yield of crops, growth of plants and roots, structure and erosion of soil, cycling of carbon and nutrients, greenhouse gas emissions, leaching, runoff and other processes that affect environmental quality. Characterization or modeling of tillage and field traffic responses, soil, climate, or topographic effects, soil deformation processes, tillage tools, traction devices, energy requirements, economics, surface and subsurface water quality effects, tillage effects on weed, pest and disease control, and their interactions.