Biological indicators of soil quality under conventional, reduced, and no-tillage systems

Mirzavand, Jahanbakhsh; Asadi-Rahmani, H.; Moradi-Talebbeigi, Reza

doi:10.1080/03650340.2020.1832656

Cited by 10 publications

(3 citation statements)

References 46 publications

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“…Soil microbial respiration was used as an indicator of microbial activity in the soils of the three treatments. Our findings are in accordance with the literature, that soil microbial respiration is typically higher in NT when compared to reduced tillage (SC in this case) or P [50,51].…”

Section: Biological Parameterssupporting

confidence: 93%

Status of Soil Health Indicators after 18 Years of Systematic Tillage in a Long-Term Experiment

Ibrahim,

Modiba,

Dekemati

et al. 2024

Agronomy

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Long-term cultivation experiments are gaining more attention due to the possibility of following the changes in soil parameters (e.g., soil organic carbon (SOC), stock and soil health indicators, etc.). Our objective was to assess the status of soil in an 18-year-old tillage experiment after almost two decades of systematic tillage. In this research, soil physical (bulk density, moisture content), chemical (pH, SOC), and biological properties (soil microbial respiration, abundance, biomass, species composition of earthworms, yield) were used as indicators in three soil cultivation methods representing different degrees of disturbance (no-till—NT; shallow cultivation—SC; and ploughing—P). Based on our results, there were significant differences in bulk density (NT > SC, P) in 0–10 cm, and NT > P in deeper layers (10–20, 20–30, 30–40 cm), while the SOC content in 0–10 cm was the highest in NT (2.5%), followed by SC (2.4%) and P (2.0%). Soil microbial respiration was significantly greater in NT than in SC and P. The abundance and biomass of earthworms was the highest in NT (189 ind m−2, 41.26 g m−2), followed by SC (125 ind m−2, 36.9 g m−2) and P (48 ind m−2, 7.4 g m−2). We concluded that NT offered a beneficial habitat for earthworms and microorganisms and a high SOC storage capacity; however, bulk density was less convenient due to soil compaction in our experiment. Therefore, SC can be used as an alternative approach for sustainable soil tillage.

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Section: Biological Parameterssupporting

confidence: 93%

Status of Soil Health Indicators after 18 Years of Systematic Tillage in a Long-Term Experiment

Ibrahim,

Modiba,

Dekemati

et al. 2024

Agronomy

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“…Minimal soil disturbance under NT is known to enhance the physical quality of soil by conserving its structural stability, withholding moisture, and enhancing OM content [45]. Furthermore, the presence of an organic layer of crop residues on the soil surface provides a consistent OC supply that stimulates the microbial community and its activity by means of an extended bacterial and fungi population, thereby increasing the rate of soil RES [45,46]. However, soil RES rates significantly decreased over time in soils under NT compared to those under CT, which remained constant (Figure 1), indicating NT's negative impact on microbial activity over time.…”

Section: Soil Microbial Respirationmentioning

confidence: 99%

Changes in Soil Microbial Parameters after Herbicide Application in Soils under Conventional Tillage and Non-Tillage

Douibi,

Carpio,

Rodríguez-Cruz

et al. 2024

Processes

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This study evaluated the changes in microbial activity in the course of time following the joint application of the herbicides S-metolachlor, foramsulfuron, and thiencarbazone-methyl to two soils (S1 and S2) under conventional tillage (CT) and non-tillage (NT) management in field conditions. The biochemical parameters of soil respiration (RES), dehydrogenase activity (DHA), microbial biomass (BIO), and the phospholipid fatty acid (PLFA) profile were determined at 1, 34, and 153 days during herbicide dissipation. In the absence of herbicides, all microbial activity was higher under NT than CT conditions, with higher or similar mean values for S1 compared to S2. A continuous decrease was detected for RES, while DHA and BIO recovered over time. In the presence of herbicides, a greater decrease in all microbial activity was detected, although the changes followed a similar trend to the one recorded without herbicides. In general, a greater decrease was observed in S1 than in S2, possibly due to the higher adsorption and/or lower bioavailability of herbicides in this soil with a higher organic carbon content. The decrease was also greater under CT conditions than under NT conditions because the herbicides can be intercepted by the mulch, with less reaching the soil. These changes involved evolution of the structure of the microbial community.

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“…For a long time, it has been taken for granted that the main plant cell-forming compounds (lignin, hemicellulose) are inert and highly degradable cell components of plants [42,43]. Recent studies showed that these compounds degrade under the influence of soil microorganisms, but they are believed to be the main sources of stabilized carbon in the soil, and only a small fraction is converted to a labile carbon fraction or immobilized in microorganism biomass [44][45][46]. There is a need to understand the diversity of microorganisms participating in the degrading process of the substrates; hence, we determined the abundance of individual physiological groups on the surface of the degradable substrate as well as its variation with different combinations of tillage and organic fertilization.…”

Section: Soil Microbiota Activity In Differently Formed Agroecosystemsmentioning

confidence: 99%

Biological Indicators of Soil Quality under Different Tillage Systems in Retisol

Vilkiene¹,

Mockeviciene²,

Karčauskienė³

et al. 2021

Sustainability

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Soil microorganism diversity has a close relation with soil function, and the changes in the composition of the soil microbial population can directly affect it. The aim of this study was to identify the bacterial community composition and determine the main soil chemical and physical properties formed by the different tillage systems. In the experiment, we analyzed the combination of three tillage systems and four organic fertilizers. Soil samples were taken from the two layers of the soil profile: the upper 0–10 cm and the lower 10–20 cm. The composition and diversity of soil bacterial communities were assessed by the sequencing of 16S rRNA genes. Results revealed that the highest biodiversity was found in the soil with shallow ploughless tillage and enriched with farmyard manure. Actinobacteria and Proteobacteria were the dominant bacterial species across all treatments. Their total abundance varied between 26% and 36% in the different analyzed agroecosystems. For the Dystric Bathygleyic Glossic Retisol, shallow ploughless tillage is the most suitable tillage system, as it creates favorable conditions for the accumulation of organic carbon in the soil under the Western Lithuania climate conditions.

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Biological indicators of soil quality under conventional, reduced, and no-tillage systems

Cited by 10 publications

References 46 publications

Status of Soil Health Indicators after 18 Years of Systematic Tillage in a Long-Term Experiment

Status of Soil Health Indicators after 18 Years of Systematic Tillage in a Long-Term Experiment

Changes in Soil Microbial Parameters after Herbicide Application in Soils under Conventional Tillage and Non-Tillage

Biological Indicators of Soil Quality under Different Tillage Systems in Retisol

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