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 15 publications

(1 citation statement)

References 57 publications

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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).…”

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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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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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Labile carbon content and nutrient availability determines microbial composition in topsoil and subsoil following land‐use change in subtropical China

Xiao,

Sheng,

Zhang

et al. 2024

Land Degrad Dev

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Evaluating the impact of land‐use intensification on soil microbial communities is essential for recognizing the implications on microbiome stability and ecosystem function. The microbial biomass and enzyme activity in the topsoil have been found to decrease as a consequence of natural forest conversion; however, the impact of land‐use conversion on the microbes in subsoil remains largely unclear. Here, we examined the effect of primary forest conversion to plantations and cultivated lands on microbial communities at three sites with similar soil, climate, and landform. The forest conversion was set as the experimental treatment, and the primary forest as the control. A linear mixed‐effect model was applied to investigate the role of environmental parameters in shaping the soil microbial biomass and community determined by the phospholipid fatty acids analysis in both the topsoil (0–20 cm) and subsoil (20–40 cm). Compared to the primary forest, the total microbial biomass, β‐1,4‐N‐acetylglucosaminidase, leucine aminopeptidase, acid phosphatase activities, and labile organic C fraction contents in both topsoil and subsoil were reduced in cultivated lands. The ratios of gram‐positive bacteria to gram‐negative bacteria and arbuscular mycorrhizal fungi to saprotrophic fungi in subsoil decreased by 45%–53% and increased by 29%–151%, respectively, following the primary forest conversion to cultivated lands. The response ratio (the percentage of microbial and enzyme indicator response to the primary forest conversion) ranged from −80% to 140% depending on the soil depth, specific microbial group, and converted land‐use type. Microbial biomass and enzyme activity are primarily controlled by the labile organic C content and nutrients availability in both topsoil and subsoil. This study suggests that the primary forest conversion exerts an adverse effect on the microbial biomass, enzyme activity, and substrate availability in both topsoil and subsoil, highlighting the degradation of subsoil health in subtropical China.

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Agroforestry can improve soil fertility and aggregate-associated carbon in highland soils in the Brazilian northeast

et al. 2023

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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 15 publications

References 57 publications

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

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

Labile carbon content and nutrient availability determines microbial composition in topsoil and subsoil following land‐use change in subtropical China

Agroforestry can improve soil fertility and aggregate-associated carbon in highland soils in the Brazilian northeast

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