Land use change impacts on red slate soil aggregates and associated organic carbon in diverse soil layers in subtropical China

Wansong, Jiang; Li, Zhenwei; Xie, Heping; Ouyang, Kai; Yuan, Hong; Duan, Liangxia

doi:10.1016/j.scitotenv.2022.159194

Cited by 18 publications

(6 citation statements)

References 57 publications

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“…These results agree with recent studies that emphasize the positive effects of legumes on macroaggregate stability, resulting in increased productivity of subsequent crops (Jiang et al., 2023). This supports similar results to those obtained in the study by da Silva (2022).…”

Section: Resultssupporting

confidence: 93%

Impacts of the tillage systems on the production of green corn (Zea mays L.) in long‐term plots in Northeastern Brazil

Santos,

Pedrotti,

Holanda

et al. 2024

Soil Use and Management

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In the current global context of climate change and the increasing demand for sustainability, optimizing agricultural production is very important in order to meet the demands for food and to mitigate environmental impact. To achieve sustainable agricultural production, particularly in regions with tropical soil and climate conditions, is necessary to adopt conservation‐oriented techniques. This includes no‐tillage system, the use of soil‐cover crops, and the application of inoculants. The objective of this research was, at the end of the 22nd cropping season, to assess the influence of soil compaction in the production of green corn (Zea mays L.) in a long‐term field experiment. This study was conducted under different soil tillage systems in a Red‐Yellow Ultisol from the Coastal Tablelands of northeastern Brazil. Three soil tillage systems were applied: Conventional Tillage (CT), Minimum Tillage (MT), and No‐tillage (NT). These were combined with four previous crops: cowpea (Vigna unguiculata), crotalaria (Crotalaria juncacea), pigeon pea (Cajanus cajan), and millet (Pennisetum glaucum), as well as two levels of nitrogen fertilizer application: (1) 100% of the recommended N dose, and (2) 50% of the recommended N dose plus Azospirillum brasilense inoculant. The experimental design consisted of strip plots with subplots divided and randomized within each strip, with three replications. Soil compaction was assessed using parameters of soil density (SD) and soil mechanical resistance to penetration (MRP) in conjunction with moisture content (MC). The principal component analysis (PCA) highlighted that conservation‐oriented systems exhibited greater soil organic carbon (SOC) levels, leading to increased productivity of commercial green corn cobs. The synergistic effect of diversifying previous crops and adopting conservation tillage systems, especially in soils under long‐term tillage, resulted in heightened productivity of commercial green corn ears.

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Section: Resultssupporting

confidence: 93%

Impacts of the tillage systems on the production of green corn (Zea mays L.) in long‐term plots in Northeastern Brazil

Santos,

Pedrotti,

Holanda

et al. 2024

Soil Use and Management

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“…Various soil aggregate-binding agents (e.g., SOC, soil microbial biomass, and GRSPs), recovered with vegetation restoration, play a central role in the formation and stabilization of soil aggregates [56,57]. For our data, soil aggregates' stability in different horizons exhibited significant variations depending on the type of vegetation present, aligning with the observations made by Jiang W and Xie H [58]. More specifically, we found that the stability of soil aggregates within CF was higher than in PF (33.7%) and CBF (87.5%).…”

Section: Analysis Of Soil Water Distributionsupporting

confidence: 89%

The Impact of Vegetation Types on Soil Hydrological and Mechanical Properties in the Hilly Regions of Southern China: A Comparative Analysis

Zheng,

Wang,

Chen

et al. 2024

Water

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Background: Vegetation roots are considered to play an effective role in controlling soil erosion by benefiting soil hydrology and mechanical properties. However, the correlation between soil hydrology and the mechanical features associated with the variation root system under different vegetation types remains poorly understood. Methods: We conducted dye-tracer infiltration to classify water flow behavior and indoor experiments (including tests on soil bulk density, soil organic carbon, mean weight diameter, soil cohesion, root density, etc.) to interpret variation patterns in three forest systems (coniferous and broad-leaved mixed forest, CBF; coniferous forest, CF; Phyllostachys edulis, PF) and fallow land (FL). Results: Based on the soil dye-tracer infiltration results, the largest dyeing area was observed in CF (36.96%), but CF also had the lowest infiltration rate (60.3 mm·min−1). The soil under CBF had the highest shear strength, approximately 25% higher than other vegetation types. CF exhibited the highest aggregate stability, surpassing CBF by 98.55%, PF by 34.31%, and FL by 407.41%, respectively. Additionally, PF forests showed the greatest root biomass and length. The results of correlation analysis and PCA reveal complex relationships among hydrological and mechanical soil traits. Specifically, soil cohesion does not exhibit significant correlations with hydrological traits such as the dyeing area, while traits like MWD and PAD show either positive or negative associations with hydrological traits. Root traits generally exhibit positive relationships with soil mechanical traits, with limited significant correlations observed with hydrological traits. Conversely, we found that root biomass contributes significantly to the dyeing area (accounting for 51.48%). Conclusions: Our findings indicate that the reforestation system is a successful approach for conserving water and reducing erosion by increasing soil-aggregated stability and shear strength, causing water redistribution to be more homogenized across the whole soil profile.

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“…However, the percentage of the macroaggregates (with particle size of 0.25-5mm) in B5 group was 31.9%, which was the highest in all the treatment groups, while it was the lowest in B0 group (22.74%). One recent study has shown that soil nutrients are negatively correlated with the percentage of aggregates with particle size of > 5mm (Jiang et al 2023). Our results showed that the addition of the CS and G1 effectively increased the percentage of the 0.25-2 mm aggregates in the soil, which was very important for soil drought resistance and soil moisture conservation Ju et al 2023).…”

Section: )supporting

confidence: 51%

Responses of soil microbial community activities and soil physicochemical properties to coal fly ash soil amendment

Li,

Qi,

et al. 2023

Preprint

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With the rapid development of industry, the consumption of coal has been increasing, and several hundred millions tons of coal fly ash are produced annually worldwide. Direct application of coal fly ash to agricultural production poses ecological risk of heavy metal pollution with low land productivity. In this study, a field experiment of coal fly ash soil amendment was conducted in Hebei province, China. The coal fly ash soil field was added with the carrier soil (CS, without containing coal fly ash) at different rate (0–40% mass content) in 0-20cm top soil layer, mixed with a rotovator, and then added with 0.45–1.80 kg·m− 2 soil amendment G1 for planting maize. The effect of soil amendments on soil physicochemical properties, maize yield, especially on soil microbial community activities were investigated in coal fly ash soil field. The results showed that G1 amendment improved the soil chemical properties and physical structure by increasing soil bulk density and soil macroaggregates. The highest maize yield was observed in B5 treatment (20% CS and 1.3500 kg·m− 2 G1). Meanwhile, the abundance of microorganisms facilitating the circulation of soil nutrients such as Acidobacteria (77.05%), Sphingomonas (25.60%), Nitrospira (20.78%), Streptomyces (11.32%), and Gaiella (10.20%) was increased. Overall, our results reveal that coal fly ash soil amendment can improve soil microbial functions, thus enhancing soil sustainability. Our findings provide the reference for the development and application of coal fly ash soil amendments.

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Land use change impacts on red slate soil aggregates and associated organic carbon in diverse soil layers in subtropical China

Cited by 18 publications

References 57 publications

Impacts of the tillage systems on the production of green corn (Zea mays L.) in long‐term plots in Northeastern Brazil

Impacts of the tillage systems on the production of green corn (Zea mays L.) in long‐term plots in Northeastern Brazil

The Impact of Vegetation Types on Soil Hydrological and Mechanical Properties in the Hilly Regions of Southern China: A Comparative Analysis

Responses of soil microbial community activities and soil physicochemical properties to coal fly ash soil amendment

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