Assessing the impact of biotransformed dry olive residue application to soil: Effects on enzyme activities and fungal community

Siles, J.A.; Pérez-Mendoza, Daniel; Ibáñez, J. A.; Scervino, José Martín; Ocampo, J. A.; García-Romera, Inmaculada; Sampedro, Inmaculada

doi:10.1016/j.ibiod.2014.01.001

Cited by 19 publications

(11 citation statements)

References 38 publications

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“…Thus, our understanding of the changes produced by DOR and OMW (olive mill waste) in the phylogenetic composition of microbial communities is limited, although these studies have demonstrated that OMW has a beneficial effect on microbial abundance. Previous surveys have found, through the use of culture-independent techniques, that DOR caused a rapid and marked increase in bacterial and fungal abundance in the soil analyzed in the present work after 30 and 60 days of treatment, while CORDOR resulted in slower and more moderate increases [23], [26]. Thus, although microtoxic effects have been associated with raw olive mill waste [62], [63], it was not possible to detect these effects in relation to abundance levels in an environment as diverse and complex as soil.…”

Section: Discussionmentioning

confidence: 46%

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Microbial Diversity of a Mediterranean Soil and Its Changes after Biotransformed Dry Olive Residue Amendment

et al. 2014

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The Mediterranean basin has been identified as a biodiversity hotspot, about whose soil microbial diversity little is known. Intensive land use and aggressive management practices are degrading the soil, with a consequent loss of fertility. The use of organic amendments such as dry olive residue (DOR), a waste produced by a two-phase olive-oil extraction system, has been proposed as an effective way to improve soil properties. However, before its application to soil, DOR needs a pre-treatment, such as by a ligninolytic fungal transformation, e.g. Coriolopsis floccosa. The present study aimed to describe the bacterial and fungal diversity in a Mediterranean soil and to assess the impact of raw DOR (DOR) and C. floccosa-transformed DOR (CORDOR) on function and phylogeny of soil microbial communities after 0, 30 and 60 days. Pyrosequencing of the 16S rRNA gene demonstrated that bacterial diversity was dominated by the phyla Proteobacteria, Acidobacteria, and Actinobacteria, while 28S-rRNA gene data revealed that Ascomycota and Basidiomycota accounted for the majority of phyla in the fungal community. A Biolog EcoPlate experiment showed that DOR and CORDOR amendments decreased functional diversity and altered microbial functional structures. These changes in soil functionality occurred in parallel with those in phylogenetic bacterial and fungal community structures. Some bacterial and fungal groups increased while others decreased depending on the relative abundance of beneficial and toxic substances incorporated with each amendment. In general, DOR was observed to be more disruptive than CORDOR.

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Section: Discussionmentioning

confidence: 46%

“…The transformation was carried out according to Siles et al [26]. Briefly, sterilized polyurethane sponge (PS) cubes were placed in Erlenmeyer flasks and 25 ml culture medium was added.…”

Section: Methodsmentioning

confidence: 99%

Microbial Diversity of a Mediterranean Soil and Its Changes after Biotransformed Dry Olive Residue Amendment

et al. 2014

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“…About 36% of the OG in Andalusia are planted on slopes with gradients greater than 15%, using land that is unsuitable for other crops to grow because conditions produce poor yields (Ibáñez et al ., ). These conditions, along with poor management practices, such as badly managed CT (Gucci et al ., ), cause land degradation, soil OM losses and therefore soil quality reduction (Shakesby et al ., ; Zdruli, ; Siles et al ., ).…”

Section: Introductionmentioning

confidence: 97%

Effects of Land Management on Different Forms of Soil Carbon in Olive Groves in Mediterranean Areas

et al. 2014

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This study analyses soil organic carbon (SOC) and hot-water extractable carbon, both measures of soil quality, under different land management-(i) conventional tillage (CT); (ii) CT plus the addition of oil mill waste alperujo (A); (iii) CT plus the addition of oil mill waste olive leaves (L); (iv) no tillage with chipped pruned branches (NT 1 ); and (v) no tillage with chipped pruned branches and weeds (NT 2 )-in a typical Mediterranean agricultural area: the olive groves of Andalusia, southern Spain. SOC values in CT, A, NT 1 and NT 2 decreased with depth, but in NT 2 , the surface horizon (0-5 cm) had higher values than the other treatments, 47% more than the average values in the other three soils. In L, SOC also decreased with depth, although there was an increase of 88·5% from the first (0-10 cm) to the second horizon (10-16 cm). Total SOC stock values were very similar under A (101·9 Mg ha À1 ), CT (101·7 Mg ha À1 ), NT 1 (105·8 Mg ha À1 ) and NT 2 (111·3 Mg ha À1 , if we consider the same depth of the others). However, SOC under L was significantly higher (p < 0·05) at 250·2 Mg ha À1 . Hot-water extractable carbon decreased with depth in A, CT and NT 1 . NT 2 and L followed the same pattern as the other management types but with a higher value in the surface horizon (2·3 and 4·9 mg g À1 , respectively). Overall, our results indicate that application of oil mill waste olive leaves under CT (L) is a good management practice to improve SOC and reduce waste.

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“…The world production of olive oil reached 3.3 million tons in 2017/2018 (International Olive Council 2018). The commonly applied two-phase extraction system generates "dry olive residue" (DOR) as a final byproduct produced in large quantities (Siles et al 2014). DOR on its own is harmful to plants and microorganisms because of its high number of phenolic compounds (Sampedro et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Effect of Dry Olive Residue–Based Biochar and Arbuscular Mycorrhizal Fungi Inoculation on the Nutrient Status and Trace Element Contents in Wheat Grown in the As-, Cd-, Pb-, and Zn-Contaminated Soils

Vejvodová

Száková

García‐Sánchez

et al. 2020

J Soil Sci Plant Nutr

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The Mediterranean countries are the largest producers of olives with Spain taking the lead in olive oil production. A two-phase extraction system is used to produce oil and dry olive residue (DOR), a waste product. DOR biochar was tested as an amendment for contaminated soils to reduce the trace element (TE) contents in crops. A DOR sample was transformed into biochar at 350°C and 500°C, and a pot experiment was conducted, where spring wheat was grown. Moreover, the mutual effect of biochar application and arbuscular mycorrhizal fungi (AMF) inoculation was assessed. The results showed the decreasing extractable proportions of Cd in the treated soils, whereas an ambiguous effect of DOR biochar on the mobility of As, Pb, and Zn in soil was observed. The changes in TE in the treated soils were related to enhanced soil pH due to the biochar application. Stepwise increases in extractable soil potassium (K) proportions were determined because of the high content of K in DOR. The element contents in wheat plants were affected by an interaction of the soil element contents and pH, and biochar pyrolysis temperature. The AMF inoculation did not affect the biochar-induced changes in element fate in the soils. The results proved the ability of DOR-based biochar to serve as the source of nutrients, especially K. However, further research is necessary to test a wider range the application rates of biochar, as well as the long-term fate of biochar in the treated soils.

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Assessing the impact of biotransformed dry olive residue application to soil: Effects on enzyme activities and fungal community

Cited by 19 publications

References 38 publications

Microbial Diversity of a Mediterranean Soil and Its Changes after Biotransformed Dry Olive Residue Amendment

Microbial Diversity of a Mediterranean Soil and Its Changes after Biotransformed Dry Olive Residue Amendment

Effects of Land Management on Different Forms of Soil Carbon in Olive Groves in Mediterranean Areas

Effect of Dry Olive Residue–Based Biochar and Arbuscular Mycorrhizal Fungi Inoculation on the Nutrient Status and Trace Element Contents in Wheat Grown in the As-, Cd-, Pb-, and Zn-Contaminated Soils

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