The role of organic/bio–fertilizer amendment on aggregate stability and organic carbon content in different aggregate scales

Yılmaz, Erdem; Sönmez, Mehmet

doi:10.1016/j.still.2017.01.003

Cited by 116 publications

(64 citation statements)

References 49 publications

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“…Generally, combined with bio-fertilizer application would lead to increased soil aggregate stability than applied chemical fertilizer or bio-fertilizer alone. Previous study showed that fungal based bio-fertilizer contributed more to macro-aggregate, while the bacterial based bio-fertilizer linked more to micro-aggregate (Hernandez-Soriano, Kerre, Kopittke, Horemans, & Smolders, 2016;Yilmaz & Sonmez, 2017).…”

Section: Soil Water Aggregate Distribution and Stabilitymentioning

confidence: 99%

“…This might be that the mycorrhizal development and activity have increased after application of bio-fertilizer, which enhanced aggregate stability in the end. Studies have shown that preparations of fungal origin are vital for the soil aggregate stability (Bethlenfalvay & Barea, 1994;Yilmaz & Sonmez, 2017). The bio-fertilizer supplement half of chemical fertilizer was found to be more effective in ensuing stability of macro-aggregate.…”

Section: Soil Water Aggregate Distribution and Stabilitymentioning

confidence: 99%

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Promoted soil C and aggregate stability in soil applied with bio-fertilizer in North China Plain

Zhu

Chen

Zhang

et al. 2020

Preprint

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Application of bio-fertilizer can improve soil fertility and retard the soil degradation. Based on a field experiment, the changes of soil organic C, aggregate stability and organic C in aggregate fractions were analyzed to investigate the effects of bio-fertilizer (BF) combined with a reduced chemical fertilizer. Bio-fertilizer was applied at rates of 0 (BF0), 30 (BF30), 50 (BF50) and 70 (BF70) t ha-1 and soil samples were collected from 0-20 cm layer in 2018 and 2019. Soil cores were separated into three aggregate sizes (>0.25 mm, 0.053-0.25 mm and <0.053 mm) using the wet sieving method. The highest soil organic C and water soluble organic C were measured in BF70, while BF50 had the highest concentrations of microbial biomass carbon, extractable organic C and KMnO4-C. Significant increases of mean weight diameter (3.16 mm in 2018 and 3.39 mm in 2019) in BF50 compared with BF0 showing the improved soil structural stability after bio-fertilizer application. Increased with increasing bio-fertilizer application rates then remained relative stable, organic C in aggregate fractions was highest in BF50. More organic C was accumulated in aggregates of 0.053-0.25 mm in bio-fertilizer amended soils, suggested that C was mainly occluded in microaggregate and benefit for protection of C from microbial decomposition. Our results indicated that bio-fertilizer combined with chemical fertilizer was effective in increasing organic C and its labile fractions, which promoted soil structural stability in turn, thereby improving soil quality.

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Section: Soil Water Aggregate Distribution and Stabilitymentioning

confidence: 99%

Section: Soil Water Aggregate Distribution and Stabilitymentioning

confidence: 99%

Promoted soil C and aggregate stability in soil applied with bio-fertilizer in North China Plain

Zhu

Chen

Zhang

et al. 2020

Preprint

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“…Vermicompost is a peat-like material, with a large surface, porosity, and microbial activity, which is conductive to the generation of aggregate in bauxite residue (Aksakal et al, 2016;Courtney, Jordan, & Harrington, 2009 Holden, 2016; Zhang et al, 2017). Meanwhile, more microbial can contribute to improvement of aggregate structure and formation of microaggregat, which will further form macroaggregate (Tisdall, 1994;Yilmaz & Sönmez, 2017).…”

Section: Effect Of Amendment On Bauxite Residue Aggregatesmentioning

confidence: 99%

“…Aggregate structure plays an important role in protecting and stabilizing organic carbon (Rabot, Wiesmeier, Schlüter, & Vogel, 2018;Yilmaz & Sönmez, 2017;Yousefi, Hajabbasi, & Shariatmadari, 2008).…”

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confidence: 99%

Improvement of aggregate‐associated organic carbon and its stability in bauxite residue by substrate amendment addition

et al. 2020

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Bauxite residue has extreme alkalinity, poor aggregate stability, and low organic carbon content, which limits plant growth on large expanses of bauxite residue disposal areas. Soil formation of bauxite residue is one of the effective approaches to transform bauxite residue into a soil-like medium for revegetation. In order to improve aggregate stability and organic carbon content in the short term, addition of substrate amendments is crucial to accelerate soil formation of bauxite residue. Nevertheless, the effect of different amendments on the stability, organic and humic substances distribution in bauxite residue aggregate is unclear. Therefore, a column experiment was used to investigate the distribution and stability of aggregate, and aggregate-associated carbon by adding phosphogypsum and vermicompost (PVC), and biosolids and microorganism (BSM). The average particle sizes of CK (control check), PVC, and BSM treatments were observed to be~114,~157, and~188 nm, respectively. Compared with CK treatment, the contents of organic carbon, humic acid, and fulvic acid following PVC treatment increased by 1.65, 1.59, and 1.57 times, respectively, and the increased contents of organic carbon, humic acid, and fulvic acid following BSM treatment reached 2.90, 2.69, and 2.60 times, respectively. Results demonstrated that amendment additions enhanced aggregate stability and carbon sequestration, but the effects of BSM treatment were better than those of PVC treatment. The findings offer an evidence that BSM treatment is a feasible approach to accelerate soil formation of bauxite residue, which shows promising applications to reclaim bauxite residue disposal areas.

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“…Slurry also contributes to greater below-ground soil biodiversity [6], soil fertility, and soil carbon cycle processes [7]. Urea fertilizer is useful to increase net primary production and improve litter quality, despite evidence of decline in below-ground soil faunal diversity [8] [9], a relative high nutrient cycling rate and greater nutrient leaching [8]. Addition of N fertilizer influences soil carbon dynamics by changing the soil carbon to nitrogen ratio [10], which regulates soil microbial processes by governing soil microbial community composition [2] and enzyme activity [11].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Grassland Management History on Soil Carbon Response to Slurry and Urea

Cui¹,

Holden²

2017

OALib

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Slurry and urea applications are part of normal nutrient management on grassland farms utilizing grazed grass and silage for animal production. It was hypothesized that management history would result in a different carbon response to slurry and urea applications for the same soil type because of differences in soil micro-environment, including microbial biomass and activity, are formed and regulated by long-term management history. An Irish grassland soil of the Skeagh Series was sampled in three fields, each with a long, consistent management history: Soil A was associated with extensive grazing by horses; soil B with medium intensity grazing by sheep and cattle, and grass silage conservation; and soil C with intensive dairy cow grazing. There were three slurry treatments (S 1 , the control of no slurry; S 2 , slurry mixed with soil; S 3 , slurry added on the soil surface) and three urea treatments (N 1 , the control of no urea; N 2, all urea applied at one time; and N 3 , three application, 30 days apart, totaling the same amount of urea as N 2 ) designed to supply 36 g C m −2 and 2 g N m −2 during an 85 day incubation trial. Soil pH, total carbon, cold water extractable organic carbon, soil respiration and two C-related enzymes (β-glucosidase and CM-cellulase) were measured. All measured soil properties showed a significant difference (P < 0.05) by management history, indicating a strong influence of long-term management on response. β-glucosidase and CM-cellulase activity showed a strong relationship with soil management history rather than with slurry or urea additions. It was concluded that management history was important to C dynamics. Slurry mixed with soil resulted in a greater soil carbon loss than slurry applied on the soil surface. One large dose of urea caused greater soil carbon loss than multiple small doses.

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The role of organic/bio–fertilizer amendment on aggregate stability and organic carbon content in different aggregate scales

Cited by 116 publications

References 49 publications

Promoted soil C and aggregate stability in soil applied with bio-fertilizer in North China Plain

Promoted soil C and aggregate stability in soil applied with bio-fertilizer in North China Plain

Improvement of aggregate‐associated organic carbon and its stability in bauxite residue by substrate amendment addition

The Effect of Grassland Management History on Soil Carbon Response to Slurry and Urea

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