Bacterial community structure of two Mediterranean agricultural soils amended with spent coffee grounds

Vela-Cano, M.; Cervera‐Mata, Ana; Purswani, Jessica; Pozo, Clementina; Delgado, Gabriel; González‐López, Jesús

doi:10.1016/j.apsoil.2019.01.006

Cited by 15 publications

(6 citation statements)

References 44 publications

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“…Both aspects should be considered in further research. These observations are also in accordance with other literature [21,25].…”

Section: Effects On Soil Fertility Propertiessupporting

confidence: 94%

“…The use of spent coffee grounds (SCG) as an organic soil amendment has recently been studied due to their interesting macronutrient composition, of mainly lignin, cellulose, and hemicellulose, as well as their diverse array of mineral and bioactive compounds [18]. The addition of SCG to soil is reported to improve its physical, chemical, and biological properties [19][20][21]. However, the high content of toxic compounds, such as caffeine, polyphenols, and tannins [22], has been found to reduce the crop biomass of lettuce [19].…”

Section: Introductionmentioning

confidence: 99%

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Hydrochars Derived from Spent Coffee Grounds as Zn Bio-Chelates for Agronomic Biofortification

et al. 2023

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Previous studies have attributed both phytotoxicity and the capacity to mobilize nutrient elements to the presence of polyphenols and melanoidins in spent coffee grounds (SCG) and SCG-hydrochars obtained through hydrothermal carbonization (HTC). This work aimed to evaluate SCG and two SCG-hydrochars obtained at 160 and 200 °C that were functionalized with Zn salts (bio-chelates), to achieve the in vitro biofortification of lettuce. Two application modes were established: (1) a fixed Zn concentration of 10 mg kg−1 of soil and (2) a fixed dose of 0.5% bio-product. Soil alone (control A) and commercial chelates (control B) were used as controls. Outcomes showed that SCG-hydrochars retain the capacity to mobilize Zn compared to SCG. However, the chelating capacity was reduced (Zn: 94%) and the toxicity was significantly increased (p < 0.05) with higher temperatures of HTC (200 °C). Both fresh and dry lettuce weights were less affected at doses of 0.5% of bio-product and registered a maximum increase of 136% of Zn in the plant content. The present study approaches the possibility of using these by-products as bioinorganic fertilizers at subtoxic doses, although more research is needed.

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“…Both aspects should be considered in further research. These observations are also in accordance with other literature [21,25].…”

Section: Effects On Soil Fertility Propertiessupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Hydrochars Derived from Spent Coffee Grounds as Zn Bio-Chelates for Agronomic Biofortification

et al. 2023

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“…The addition of coffee CW resulted in increased nematode abundance, especially bacterivores and fungivores at 3MAA. CW constitutes a rich carbon source for soil microbes, and it is reported that its application enhances plant growth-promoting bacteria [26] and increases microbial respiration [6]. Apparently, the enhancement in soil microflora has led to an increased abundance of microbivores through the soil food chain.…”

Section: Discussionmentioning

confidence: 99%

“…The effects on the soil community and their alterations over time have been largely neglected [21]. There are only two studies linking soil microbial properties with CW application [6,26].…”

Section: Introductionmentioning

confidence: 99%

The Differentiations in the Soil Nematode Community in an Agricultural Field after Soil Amendment Using Composted Coffee Waste in Various Concentrations

Kekelis,

Argyropoulou,

Theofilidou

et al. 2023

Agronomy

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In a field experiment, composted coffee waste (CW) was used as soil amendment at three different rates (2%, 4%, and 8%) in plots cultivated with wheat; the effects on the soil nematode community and plant growth were studied. By sampling twice, i.e., three and six months after the application of treatments (3MAA and 6MAA), the duration of these effects was also evaluated. Treatment using composted coffee waste (CW) led to an increased abundance of all soil nematodes, especially of bacterivores and fungivores, probably via a bottom-up effect of CW on the soil community. The most-affected genera were the enrichment opportunists Panagrolaimus and Rhabditis, which increased after CW addition in a dosage-dependent way at 3MAA, while at 6MAA they were replaced by general opportunists, mainly bacterivorous and fungivorous genera; a nematotoxic effect of CW was also observed in the 6MAA condition. The nematode indices and the metabolic footprint indicated an enriched and vigorous soil three months after CW addition and a lower enrichment status of the soil together with a higher fungal participation in the decomposition pathway six months after treatments. However, in the 6 MAA condition, the soil nutrient values were higher in the CW-treated plots. None of our treatments inhibited or enhanced plant growth.

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“…These authors emphasize that despite the phytotoxic effects of SCG, its proven effects on the physical and chemical fertility of soils, as well as its influence on the soil microbiota, make this form of SCG reuse advisable. Previously, our research group has evaluated the effect that the addition of this residue has on Mediterranean agricultural soils in relation to its physical, chemical, physicochemical and biological properties (Cervera‐Mata et al, 2018, 2021, 2022; Cervera‐Mata, Martín‐García, et al, 2019; Comino et al, 2020; Vela‐Cano et al, 2019). In summary, the main results obtained by the aforementioned authors were: (a) SCGs modify the C cycle by increasing its recalcitrant forms and increasing the content of humic and fulvic acids; (b) SCGs increase the contents of total N and the available forms of K and P; (c) they increase water retention at −33 and −1500 kPa, decrease bulk density, modify size and shape of soil aggregates and, increase total porosity and structural stability; (d) as negative effects of the addition of SCGs, there is a decreasing plant growth and a decrease in plant available water.…”

Section: Introductionmentioning

confidence: 99%

Sequential effects of spent coffee grounds on soil physical properties

Cervera‐Mata

Molinero‐García

Martín‐García

et al. 2022

Soil Use and Management

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Bacterial community structure of two Mediterranean agricultural soils amended with spent coffee grounds

Cited by 15 publications

References 44 publications

Hydrochars Derived from Spent Coffee Grounds as Zn Bio-Chelates for Agronomic Biofortification

Hydrochars Derived from Spent Coffee Grounds as Zn Bio-Chelates for Agronomic Biofortification

The Differentiations in the Soil Nematode Community in an Agricultural Field after Soil Amendment Using Composted Coffee Waste in Various Concentrations

Sequential effects of spent coffee grounds on soil physical properties

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