Response of soil bacterial communities in wheat rhizosphere to straw mulching and N fertilization

Chen, Songhe; Xiang, Xiaoling; Ma, Hongan; Penttinen, Petri; Zheng, Ting; Huang, Xiulan; Fan, Guoquan

doi:10.3389/fmicb.2022.982109

Cited by 3 publications

(2 citation statements)

References 57 publications

(51 reference statements)

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“…Our study found that the abundant bacterial phyla were similar, but their relative abundance changed in the different treatments. As in Chen et al (2022), after adding straw, the Proteobacteria , Firmicutes , Gemmatimonadota , Acidobacteriota , Bacteroidota , Actinobacteriota and Chloroflexi comprised the major part of the relative abundance in all treatments. These bacterial phyla are considered key groups in straw decomposition in soil and of great significance in carbon cycling (Banerjee et al, 2016).…”

Section: Discussionsupporting

confidence: 66%

Changes in soil organic carbon and microbial community in saline soil following different forms of straw incorporation

Fan,

Zhang,

et al. 2024

European J Soil Science

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Straw has been commonly incorporated into soil to increase soil organic carbon (SOC) content. However, the response and mechanism of organic carbon transformation following the addition of different forms of straw to saline soil to have not been fully evaluated. Thus, in our study, chopped wheat straw, granular wheat straw and wheat straw biochar were used as exogenous organic amendments. The carbon‐to‐nitrogen ratio of each form of straw was adjusted to 25:1. Under the same amount of carbon input, the three forms of straw were added to saline soil for a one‐year incubation experiment. The research focused on studying the changes in SOC transformation, enzyme activity, and microbial community structure. At the end of incubation, both granular and biochar straw treatments had significantly increased SOC relative to the unamended control, with extent of SOC increase greater in the biochar straw treatment. The biochar straw treatment also had significantly higher dissolved organic carbon than the other treatments at end of the incubation. The enzyme activity of β‐cellobiohyrolase (CBH) was the highest in the granular straw treatment, which was increased by 71.9% compared with the chopped straw treatment (p < 0.05). The cumulative carbon mineralization amount (Cum C) in the granular straw treatment was the highest, which was increased by 757.4% and 21.3% compared with the biochar straw and chopped straw treatments, respectively (p < 0.05). The Mantel test analysis further revealed significant correlations between soil bacterial community and SOC content in soils treated with different straw incorporation forms, as well as between fungal community and extracellular enzyme activities. We assumed that a possible reason for the high SOC mineralization amount in the granular straw treatment was changing the structure of the Bacteroidota in the bacterial phylum and Blastocladiomycota in the fungal phylum. Based on these findings, it is believed that adding biochar can increase the SOC content, but its utilization by microorganisms is limited. However, applying granular straw will not have a negative impact on its use as a microbial carbon source, thereby promoting carbon transformation. Therefore, in future research aimed at enhancing soil fertility in saline soil regions, the adoption of granular straw as an agricultural practice is recommended and should be promoted.

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Section: Discussionsupporting

confidence: 66%

Changes in soil organic carbon and microbial community in saline soil following different forms of straw incorporation

Fan,

Zhang,

et al. 2024

European J Soil Science

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“…Coffee ecological recycling cultivation systems can increase the diversity and richness of the soil microbial community by enhancing soil moisture content, enhancing soil biological activity, and promoting soil mineralization and accumulation of carbon, nitrogen, and phosphorus ( Muhammad et al, 2021 ; Liu et al, 2023 ). For example, straw mulching increases the diversity and richness of the rhizosphere bacterial community by increasing the soil organic carbon (SOC) content and providing an effective carbon source for bacteria ( Chen et al, 2022 ). The mixed mulch of plastic film and straw has either a positive or negative effect on the diversity of bacteria, actinobacteria, and fungi by changing the soil temperature ( Li et al, 2016 ).…”

Section: Introductionmentioning

confidence: 99%

Effects of coffee pericarp and litter mulsching on soil microbiomes diversity and functions in a tropical coffee plantation, South China

Zhao,

Zhang,

Zhao

et al. 2024

Front. Microbiol.

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In recent decades, ecological cyclic cultivation models have attracted increasing attention, primarily because the decomposition of crop residues and litter enhances soil organic matter content, thereby altering the soil microenvironment and regulating the diversity and functions of soil microbial communities. However, the effects of different coffee waste mulching on the diversity of soil microbial communities and their functions are still unclear. Therefore, this study set up four kinds of covering treatments: uncovered coffee waste (C), covered coffee litter (L), covered coffee pericarp (P), and both covered coffee litter and pericarp (PL). The results showed that compared to the control, coffee pericarp mulching significantly increased the soil available potassium (SAK) content by 18.45% and alkali hydrolyzed N (SAN) content by 17.29%. Furthermore, coffee pericarp mulching significantly increased bacterial richness and diversity by 7.75 and 2.79%, respectively, while litter mulching had little effect on bacterial abundance and diversity was smaller. The pericarp mulching significantly increased the abundance of Proteus by 22.35% and the abundance of Chlamydomonas by 80.04%, but significantly decreased the abundance of Cyanobacteria by 68.38%, while the coffee litter mulching significantly increased the abundance of Chlamydomonas by 48.28%, but significantly decreased the abundance of Cyanobacteria by 73.98%. The increase in soil SAK promoted bacterial Anoxygenic_photoautotrophy, Nitrogen_respiration, Nitrate_respiration, Nitrite_respiration, and Denitrification functions. The above results indicate that the increase in available soil potassium and alkali hydrolyzed N content under coffee pericarp cover is the main reason for promoting the diversity and richness of bacterial community and promoting the changes in bacterial community structure and function. The use of coffee pericarps in coffee plantations for ecological recycling helps to improve the diversity of the soil microbial community and maintain the relative stability of the microbial community structure and function, promoting soil health conservation and the sustainable development of related industries.

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Soil bacterial communities are influenced by mulching methods and growth stages in dryland wheat fields

Zhang,

Cheng,

Chai

et al. 2024

Plant Soil

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Response of soil bacterial communities in wheat rhizosphere to straw mulching and N fertilization

Cited by 3 publications

References 57 publications

Changes in soil organic carbon and microbial community in saline soil following different forms of straw incorporation

Changes in soil organic carbon and microbial community in saline soil following different forms of straw incorporation

Effects of coffee pericarp and litter mulsching on soil microbiomes diversity and functions in a tropical coffee plantation, South China

Soil bacterial communities are influenced by mulching methods and growth stages in dryland wheat fields

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