Has compost with biochar added during the process added value over biochar or compost to increase disease suppression?

Debode, Jane; Ebrahimi, Negin; D’Hose, Tommy; Cremelie, Pieter; Viaene, Nicole; Vandecasteele, Bart

doi:10.1016/j.apsoil.2020.103571

Cited by 24 publications

(6 citation statements)

References 33 publications

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“…No increase in microbial biomass was observed for the peat blend for both organic fertilizers. A strong increase of the total microbial biomass shortly after adding crab shell compost and other composts to soil [37,38] or after adding chitin to peat [24,39] in pot trials was previously reported; in most cases this coincided with a higher N availability. In the current research on more active substrates as peat alternatives, an inverse relationship was found between the increase in microbial biomass and the increase in N availability.…”

Section: Total Microbial Biomass: Value As Indicator and Link With N ...mentioning

confidence: 56%

Sustainable Growing Media Blends with Woody Green Composts: Optimizing the N Release with Organic Fertilizers and Interaction with Microbial Biomass

Vandecasteele¹,

Loo²,

Ommeslag³

et al. 2022

Agronomy

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The aim of the current study was to create a high quality growing medium blend that replaces 70 vol% peat with 40 vol% woody green compost and 30 vol% bark compost and organic fertilizers (i.e., blood meal and chitin), all locally sourced. A range of “woody composts”, i.e., green composts based on feedstock selection with mainly woody material from tree prunings, were produced for this purpose at green compost facilities. First, the woody composts were characterized chemically and biologically, including their microbial biomass and net N release. In comparison with regular green composts or vegetable, fruit and garden (VFG) waste composts, woody composts are more suitable for use in growing media due to their lower pH, EC and inorganic C content; however, the woody compost had a low N mineralization rate. Three types of composts supported a higher microbial biomass than wood fiber or bark compost. The additional mineral N release after 100 days for compost mixed with blood meal was tested for different VFG and green composts. A significantly higher additional net N release was measured for composts with higher initial mineral N concentrations (317 mg Nmin/L) as well as VFG composts (417 mg Nmin/L) than for green composts with a lower initial mineral N concentration (148 mg Nmin/L). In a last step, woody compost, bark compost, wood fiber, coir and peat were mixed in different ratios, resulting in six blends ranging from 100% peat-free to100% peat. Two batches of woody compost were compared, and the blends were mixed with blood meal or chitin. A strong effect of both the organic fertilizer and the blend composition on the mineral N release was observed, with a clear link between the microbial biomass and the net N release. There was a significant negative correlation between the net change in microbial biomass and the net N release (R = −0.85), which implies that a larger increase in microbial biomass during incubation with the organic fertilizer resulted in less N mineralization. The blends containing woody compost scored better for nitrification activity, as the NH4-N concentrations were lower in these than for the blends without woody compost. For the peat blends, no effect on the microbial biomass was observed after addition of organic fertilizers; mineral N did increase, however. Woody composts have the potential to be used in high vol% in growing media blends, but the blends still need further optimization when supplemented with organic fertilizers.

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Section: Total Microbial Biomass: Value As Indicator and Link With N ...mentioning

confidence: 56%

Sustainable Growing Media Blends with Woody Green Composts: Optimizing the N Release with Organic Fertilizers and Interaction with Microbial Biomass

Vandecasteele¹,

Loo²,

Ommeslag³

et al. 2022

Agronomy

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“…10: 230442 Fusarium oxysporum f. sp. lycopersici in tomatoes due to synergic effect, but Debode et al [59] showed little or negligible effect of biochar-amended compost on lettuce basal rot (R. solani). Such a variable response of patho-systems to the biochar application makes it very essential to assess different biochars based on feedstock against different hosts and pathogens.…”

Section: Discussionmentioning

confidence: 99%

Physiological and biochemical characterization of biochar-induced resistance against bacterial wilt of eggplants

Ahmad,

Haider,

Akhter

2023

R. Soc. open sci.

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The abrupt variation in climatic patterns has become a global concern in terms of food security. Biochar, known to ameliorate climatic adversities by sequestering carbon and activating systemic resistance pathways in plants, has become increasingly relevant. Therefore, the study was aimed to characterize leaf waste biochar (LWB) by Fourier-transform infrared spectroscopy, scanning electron microscopy with energy dispersive X-ray (SEM-EDX) and X-ray diffraction analytical techniques as well as determination of its impact on the development of bacterial wilt (BW) in eggplant ( Solanum melongena ) caused by Ralstonia solanacearum (RS). The effect of LWB on the physiology and defence-associated biochemistry of eggplants was investigated thoroughly. Eggplants either inoculated (+RS) or uninoculated (-RS) were cultivated in potting mixture containing 3 and 6% (v/v) LWB separately. In comparison with substrate (soil only), percentage disease index was significantly reduced (71%) in plants grown in 6% LWB-amended treatments. Biochar-induced increase in level of total chlorophyll content as well as in biochemicals such as phenolics, flavonoids and peroxidases were evident on plants in terms of resistance response against BW. Moreover, biochar also significantly affected the level of NPK in the eggplants. In conclusion, biochar-triggered biochemical alterations played a pivotal role in the management of BW along with the curing of the disease-infested soils.

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“…Biochar may also act as a biostimulant when used as a carrier of inoculum for microorganisms ( Hale et al., 2015 ; Głodowska et al., 2016 ; Hardy and Knight, 2021 ), as a suppressor of plant disease ( Graber et al., 2010 ; Debode et al., 2020 ), and as a coating for novel biochar-fertilizer composites ( Joseph et al., 2013 ) or slow-release fertilizers ( An et al., 2020 ). However, these applications have not been fully explored in vineyards.…”

Section: Biostimulant Materialsmentioning

confidence: 99%

Application of biostimulant products and biological control agents in sustainable viticulture: A review

Jindo

Goron²,

Pizarro‐Tobías³

et al. 2022

Front. Plant Sci.

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Current and continuing climate change in the Anthropocene epoch requires sustainable agricultural practices. Additionally, due to changing consumer preferences, organic approaches to cultivation are gaining popularity. The global market for organic grapes, grape products, and wine is growing. Biostimulant and biocontrol products are often applied in organic vineyards and can reduce the synthetic fertilizer, pesticide, and fungicide requirements of a vineyard. Plant growth promotion following application is also observed under a variety of challenging conditions associated with global warming. This paper reviews different groups of biostimulants and their effects on viticulture, including microorganisms, protein hydrolysates, humic acids, pyrogenic materials, and seaweed extracts. Of special interest are biostimulants with utility in protecting plants against the effects of climate change, including drought and heat stress. While many beneficial effects have been reported following the application of these materials, most studies lack a mechanistic explanation, and important parameters are often undefined (e.g., soil characteristics and nutrient availability). We recommend an increased study of the underlying mechanisms of these products to enable the selection of proper biostimulants, application methods, and dosage in viticulture. A detailed understanding of processes dictating beneficial effects in vineyards following application may allow for biostimulants with increased efficacy, uptake, and sustainability.

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Has compost with biochar added during the process added value over biochar or compost to increase disease suppression?

Cited by 24 publications

References 33 publications

Sustainable Growing Media Blends with Woody Green Composts: Optimizing the N Release with Organic Fertilizers and Interaction with Microbial Biomass

Sustainable Growing Media Blends with Woody Green Composts: Optimizing the N Release with Organic Fertilizers and Interaction with Microbial Biomass

Physiological and biochemical characterization of biochar-induced resistance against bacterial wilt of eggplants

Application of biostimulant products and biological control agents in sustainable viticulture: A review

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