Obtaining edaphic biostimulants/biofertilizers from different sewage sludges. Effects on soil biological properties

Rodríguez-Morgado, Bruno; Gómez, Isidoro; Parrado, Juan; García-Martínez, A.M.; Aragón, C. A.; Tejada, Manuel

doi:10.1080/09593330.2015.1024760

Cited by 30 publications

(38 citation statements)

References 35 publications

(51 reference statements)

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“…Up to now, the mechanisms enrolled to improve soil biological functioning are still misunderstood. In the literature, most of the studies focusing on the impact of soil biostimulant on soil biochemical properties are mainly limited to the analysis of soil enzyme activities as a proxy of microbial functions 5,15,16 . Soil microbial communities are strongly influenced by soil properties and respond, for example, to changes in soil pH or moisture 17,18 .…”

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confidence: 99%

Responses of active soil microorganisms facing to a soil biostimulant input compared to plant legacy effects

Hellequin

Monard

Chorin

et al. 2020

Sci Rep

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Agriculture is changing to rely on agroecological practices that take into account biodiversity, and the ecological processes occurring in soils. The use of agricultural biostimulants has emerged as a valid alternative to chemicals to indirectly sustain plant growth and productivity. Certain BS have been shown to select and stimulate plant beneficial soil microorganisms. However, there is a lack of knowledge on the effects and way of action of the biostimulants operating on soil functioning as well as on the extent and dynamic of these effects. In this study we aimed to decipher the way of action of a seaweed and amino-acids based biostimulant intended to be applied on soil crop residues to increase their microbial mineralization and the further release of nutrients. By setting-up a two-phase experiment (soil plant-growing and soil incubation), our objectives were to (1) determine the effects of the soil biostimulant over time on the active soil bacteria and fungi and the consequences on the organic carbon mineralization in bare soils, and (2) assess the biostimulant effects on soil microorganisms relatively to plant legacy effects in planted soils. We demonstrated that the soil biostimulant had a delayed effect on the active soil microorganisms and activated both plant growth promoting bacteria and saprophytes microorganisms at the medium-term of 49 days. However, the changes in the abundances of active microbial decomposers were not associated to a higher mineralization rate of organic carbon derived from soil and/or litter. The present study assessed the biostimulant beneficial effect on active soil microbial communities as similar as or even higher than the legacy effects of either A. thaliana or T. aestivum plants. We specifically showed that the biostimulant increased the active fungal richness to a higher extent than observed in soils that previously grew the two plants tested.

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confidence: 99%

Responses of active soil microorganisms facing to a soil biostimulant input compared to plant legacy effects

Hellequin

Monard

Chorin

et al. 2020

Sci Rep

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“…Compared with chemical fertilizers, biofertilizers provide socioeconomic and ecological benefits, including improvements of soil and environment quality, food safety, and human and animal health. [15][16][17] Treatment of food waste with P. lilacinus leaves no residues for second treatment, but valuable and environment-friendly biofertilizer with biocontrol ability against RKN disease.…”

Section: Introductionmentioning

confidence: 99%

Conversion of food waste into biofertilizer for the biocontrol of root knot nematode by Paecilomyces lilacinus

Zhang

et al. 2015

Environmental Technology

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The feasibility of converting food waste into nematocidal biofertilizer by nematophagous fungus Paecilomyces lilacinus (P. lilacinus) was investigated. The culture conditions of P. lilacinus were optimized through response surface methodology. Results showed that fermentation time, the amount of food waste, initial pH and temperature were most important factors for P. lilacinus production. The P. lilacinus production under optimized conditions was 10(9.6 ± 0.3) conidia mL⁻¹. After fermentation, the chemical oxygen demand concentration of food waste was efficiently decreased by 81.92%. Moreover, the property evaluation of the resultant food waste as biofertilizer indicates its high quality with reference to the standard released by the Chinese Ministry of Agriculture. The protease activity and nematocidal ability of P. lilacinus cultured by food waste were 10.8% and 27% higher than those by potato dextrose agar, respectively.

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“…It is possible that this lack of uniformity is related to the low availability of data regarding the chemical composition of these inputs and the raw materials, which makes it difficult to plan for the elaboration of formulations. In addition, due to different possible combinations among raw materials to obtain a biofertilizer, it is expected that there would be products with a wide range of nutrient contents [11,[21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39]. In general, two major groups of waste sources have been used to produce biofertilizers: One is based on manure from different animals [21,22], and the other is composed of agro-industrial and household wastewater, such as cassava, olive, or domestic waste processing [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Heterogeneity in the Chemical Composition of Biofertilizers, Potential Agronomic Use, and Heavy Metal Contents of Different Agro-Industrial Wastes

et al. 2019

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Several agro-industrial, livestock, and food wastes can be recycled to create biofertilizers. This diversity of raw materials can result in nutritional imbalance and an increase in heavy metal content, which could make the final product unfeasible. Thus, the chemical characterization of the raw materials and their influence on the sustainable and safe production of biofertilizers need to be better understood. In this context, the objective of the present study was to evaluate the chemical characteristics of agro-industrial residues used in the manufacture of an aerobic liquid biofertilizer. We analyzed the macronutrient, micronutrient, and trace metal contents of seven waste products used as raw materials to create a biofertilizer. In addition, a survey of secondary biofertilizer data from different residues was carried out that showed great heterogeneity in the chemical compositions of these residues, which has a direct impact on the agronomic efficiency of these biofertilizers. The characterization revealed that some materials may be contaminants of the soil, due to high levels of trace metals, especially cadmium. We conclude that the generation of detailed inventories, such as those of the nutrient and heavy metal contents of the raw materials and biofertilizers produced, is indispensable for the correct recommendation of biologically-based inputs in agriculture.

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Obtaining edaphic biostimulants/biofertilizers from different sewage sludges. Effects on soil biological properties

Cited by 30 publications

References 35 publications

Responses of active soil microorganisms facing to a soil biostimulant input compared to plant legacy effects

Responses of active soil microorganisms facing to a soil biostimulant input compared to plant legacy effects

Conversion of food waste into biofertilizer for the biocontrol of root knot nematode by Paecilomyces lilacinus

Heterogeneity in the Chemical Composition of Biofertilizers, Potential Agronomic Use, and Heavy Metal Contents of Different Agro-Industrial Wastes

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