Comparison of traditional and improved methods for estimating the stability of organic growing media

Domeño, I.; Irigoyen, Ignacio; Muro, Julio

doi:10.1016/j.scienta.2011.07.012

Cited by 13 publications

(8 citation statements)

References 12 publications

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“…Although our time-course experiments lasted up to 3 months, Van Soest's method only provided information about the mineralization potential of substrates, based on the differences in their initial biochemical composition. In general, the more polysaccharides a substrate contains, the more intense its microbial activity will be (Domeño et al, 2011;Kumar et al, 2012;Lv et al, 2010). Similarly, with a high cellulose/lignin ratio, wood fibers were expected to exhibit high mineralization rates.…”

Section: Discussionmentioning

confidence: 99%

“…Organic matter nature appears to be a determining factor for microbial development. Domeño et al (2011) showed that coir fibers were less degraded than wood fibers because they contain more lignin (43%). While cellulose from organic matter is indeed rapidly hydrolyzed, thanks to endoglucanases, by certain mesophile fungi such as Trichoderma reesei (Pérez et al, 2002), lignin degradation requires specialized microbial populations able to synthesize peroxidases.…”

Section: Introductionmentioning

confidence: 99%

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Structure and activity of spontaneous fungal communities in organic substrates used for soilless crops

Montagne

Charpentier

Cannavo

et al. 2015

Scientia Horticulturae

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structure and activity of spontaneous fungal communities in organic substrates used for soilless crops

Montagne

Charpentier

Cannavo

et al. 2015

Scientia Horticulturae

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“…Microbial functions of GM types received little attention in the past [2] and mainly concerned weed and pathogen controls [16,17], biological stability, nutrient immobilization [2,8], nitrification stimulated by urea or ammonium-based fertilization [11], and more recently, regarding nutrient availability [18] and the potential mitigation of greenhouse gas emission by adding biochars [19]. The instability of GM related to carbon (C) cycle was studied through the loss of organic matter [20], dioxygen and carbon dioxide evolution [21][22][23][24][25], or dehydrogenase activity [26] as indicators of global microbial activity. Concerning the nutrient availability of GM, attention was given to N immobilization [27,28] and to a lesser extent phosphorus (P) [29] due to microbial consumption.…”

Section: Introductionmentioning

confidence: 99%

Growing Medium Type Affects Organic Fertilizer Mineralization and CNPS Microbial Enzyme Activities

Paillat¹,

Cannavo²,

Barraud³

et al. 2020

Agronomy

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Managing plant fertilization is a major concern of greenhouse growers to achieve sustainable production with growing media (GM). Organic fertilization is popular but is more difficult to control, since organic compounds need first to be mineralized by microbes. After 7, 14, 28, and 56 days of incubation, we investigated the response of microbial activities and nutrient releases from three frequently used organic fertilizers (horn and two plant-based fertilizers) in three frequently employed GM types (peat, coir, and bark). We measured pH, electrical conductivity, nutrient contents (NH4+-N, NO3−-N, PO43−-P, SO42−-S), and enzyme activities (β-1.4-glucosidase, urease, acid phosphatase, arylsulfatase). After fertilization, microbes in coir expressed all the C, N, P, and S functions studied, making related nutrients available. In peat and bark, some C, N, P, and S-related pathways were locked. Peat presented high NH4+-N and PO43−-P releases linked to high acid phosphatase and β-glucosidase activities, while bark showed high nitrification rates but weak enzyme activities. Fertilizer types modulated these responses with lower activities and nutrient releases with horn. Our results contributed to better understanding mineralization processes in GM, showing different microbial responses to fertilization. This study pointed out the necessity to look deeper into microbial functions in GM optimizing biological and physicochemical properties.

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“…Substrate origin phytopathogenic microorganisms and their antagonists (Domeño et al, 2011;Kleiber et al, 2012;Pérez et al, 2002) Environment-friendly control strategies, among which microbiological control, are of growing interest for the sector. Many studies have addressed the role of microorganisms in plant protection against pathogens, including soil-borne ones (Mercier and Manker, 2005;Shanmugam and Kanoujia, 2011).…”

Section: Substratementioning

confidence: 99%

Protective effect of organic substrates against soil-borne pathogens in soilless cucumber crops

Montagne

Capiaux

Cannavo

et al. 2016

Scientia Horticulturae

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Protective effect of organic substrates against soil-borne pathogens in soilless cucumber crops. Scientia Horticulturae, Elsevier, 2016, 206, pp.62-70. 10.1016/j.scienta.2016.04.035. hal-01523673 Scientia Horticulturae 206 (2016 Contents lists available at ScienceDirect Scientia Horticulturae j o u r n a l h o m e p a g e : w w w . e l s e v i e r . c o m / l o c a t e / s c i h o r t i a b s t r a c tThe development of sustainable crop protection is expected by vegetable producers and highly encouraged by authorities. For crops grown in soilless systems, vegetable fibers are relevant for both agronomical and plant protection purposes. This work examines their potential against the soil-borne pathogen Fusarium oxysporum f. sp. radicis-cucumerinum. Wood fiber, coir fiber and peat were tested over two cucumber cropping periods. Fusarium blight symptoms were monitored on cucumber, and fungal community structure (PCR-TTGE) in substrates. Substrate sterilization and bio-augmentation with antagonistic strains were also studied; they did not modify protection. Compared to the other substrates, wood fiber increased protection at the end of the first assay, but did not during the second assay. Differences in crop season and plant density may have impacted on cucumber physiology and may have indirectly modified rhizosphere fungal community structure.The sole determination of microbial activity in substrates is not sufficient to predict protection. Growth conditions, substrate type and the microbiome altogether impacted on the protection of cucumber.

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Comparison of traditional and improved methods for estimating the stability of organic growing media

Cited by 13 publications

References 12 publications

Structure and activity of spontaneous fungal communities in organic substrates used for soilless crops

Structure and activity of spontaneous fungal communities in organic substrates used for soilless crops

Growing Medium Type Affects Organic Fertilizer Mineralization and CNPS Microbial Enzyme Activities

Protective effect of organic substrates against soil-borne pathogens in soilless cucumber crops

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