Effects of cover crop quality and quantity on nematode-based soil food webs and nutrient cycling

DuPont, S. Tianna; Ferris, H.; Horn, Mark Van

doi:10.1016/j.apsoil.2008.10.004

Cited by 147 publications

(64 citation statements)

References 46 publications

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“…Although the use of cover-crops may be deemed more "naturefriendly" than more aggressive and interventionist approaches (i.e., the use of conventional or biological control measures), it may take a long time with uncertain outcomes (DuPont et al, 2009;Lavelle et al, 2004;Masse et al, 2002;Summers et al, 2014).…”

Section: Paratrichodorus Spp: a 'New' Threat To Tomato Producers?mentioning

confidence: 99%

Nematode community profiling as a soil biology monitoring tool in support of sustainable tomato production: A case study from South Africa

Malherbe

Marais

2015

Applied Soil Ecology

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Management of the biological component of agricultural soils is a vital aspect of sustainable food production systems. There is a need for soil biology metrics that producers can use as a decision support tool when it comes to managing the soil biological component of agricultural soils. We evaluated the usefulness of nematode community profiling as a soil biology monitoring tool in support of a sustainable commercial-scale tomato production system in South Africa. The objectives were to: 1) study the effects of land use change on nematode communities in the tomato production region, and 2) explore the correlation between tomato crop productivity and the nematode community metrics. The enrichment index was a sensitive indicator of land use change, but the structure index was not. Although the number and proportion of free-living and plant-parasitic nematodes increased and decreased respectively, the selective amplification of specific herbivorous genera was observed.Helicotylenchus spp. was sensitive to land use change and might serve as soil health indicator in this tomato production region. Regression analysis indicated a combination of variables associated with soil pH, free-living nematodes (notably the bacterivores) and specific plant-parasitic nematode genera (Paratrichodorus spp. and Rotylenchus spp.) predictedtomato yield (R 2 = 0.846). Despite the useful information gleaned from the nematode community metrics regarding soil food web functioning, the importance of ecologically and economically important nematode genera was re-emphasized. The results of this study highlight an important principle regarding development of soil health metrics for tomato agroecosystems: tomato crop health was not necessarily predicted solely by indicators of soil food web health and functioning.

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Section: Paratrichodorus Spp: a 'New' Threat To Tomato Producers?mentioning

confidence: 99%

Nematode community profiling as a soil biology monitoring tool in support of sustainable tomato production: A case study from South Africa

Malherbe

Marais

2015

Applied Soil Ecology

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“…They are widespread and highly diverse, occupying multiple trophic positions in soil food web, and they are frequently used as indicators of environmental soil changes (Neher, 2001;Ferris & Bongers, 2006;Sun et al, 2013). Furthermore, they can provide useful information on soil food web dynamics (DuPont et al, 2009). In general, previous studies showed that numbers of soil mites (Prostigmata, Mesostigmata and Oribatei), Collembola and nematodes were similar in soil planted with Bt maize and soil planted with its isoline (Al-Deeb et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Effect of transgenic insect-resistant maize to the community structure of soil nematodes in two field trials

Čerevková

Cagáň

2015

Helminthologia

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SummaryThe aim of this study was to determine the effects of Bt maize hybrid cultivation on soil nematode communities in two field trials, as well as to analyse other factors (fertilisation and moisture) responsible for the community structure of soil nematodes. Nematode communities were studied in maize plots at the locality of Borovce in western Slovakia. During 2012 and 2013, hybrids DK440 and DKC3871 (conventional) or DKC4442YG and DKC3872YG (Bt maize, event MON810) were sown in 10 repetitions each. Nematodes were extracted from soil samples collected at the maize flowering (July 11, 2012 and July 30, 2013). Altogether, 39 nematode species belonged to 35 genera were identified in two maize variants. The dominant taxa in both variants were Acrobeloides nanus, Cephalobus persegnis, Aphelenchoides composticola, Aphelenchus avenae, Eudorylaimus carteri and Filenchus vulgaris. Calculation of the maturity index, plant parasitic index, enrichment index and structure index did not confirm any clear influence of year or hybrid type on soil nematode communities. The proportional representation of cp-1, cp-2 and cp-3-5 groups of nematode fauna indicated conditions of low stability and high stress. Faunal profiles representing the structure and enrichment conditions of the soil food web showed an environment with a high C:N ratio and high levels of fungal feeders. Based on the calculation of the metabolic footprint of nematodes in the soil food web, a difference between the isoline maize variant and Bt maize variant in 2012 was found, but this difference was not readily apparent in 2013. The occurrence of nematodes, their abundance, proportion of feeding types and selected ecological indices did not depend on the type of maize hybrid (Bt or nonBt). Thus, the cultivation of genetically modified maize did not directly influence nematode populations. The application of fertiliser at certain periods does not influence the nematode community. The observed significant higher abundance of nematodes was correlated with soil moisture.

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“…A fauna do solo exerce importante papel na ciclagem de nutrientes (Osler & Sommerkorn, 2007;Dupont et al, 2009;Carrillo et al, 2011), uma vez que é responsável pela regulação da comunidade de microrganismos decompositores da matéria orgânica e fragmentação desse material (Souza et al, 2008;Yang & Chen, 2009), influenciando direta e indiretamente no ciclo da matéria e no fluxo de energia ao longo dos ecossistemas terrestres. Além disso, esses organismos apresentam grande contribuição para a agregação do solo (Scheu, 2003;Oyedele et al, 2006;Oliveira et al, 2012;Siddiky et al, 2012), por meio de suas ações mecânicas (construção de ninhos e escavação) e modificando os materiais do solo pela deposição de compostos orgânicos (Bignell, 2006).…”

Section: Introductionunclassified

Fauna edáfica em área periodicamente inundável na restinga da Marambaia, RJ

Silva

Pereira

et al. 2013

Rev. Bras. Ciênc. Solo

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RESUMONo compartimento serapilheira-solo, a fauna do solo exerce importante papel na disponibilização de nutrientes, uma vez que é responsável pela regulação da comunidade de microrganismos decompositores da matéria orgânica e pela fragmentação desse material. Este trabalho objetivou avaliar a riqueza e abundância da fauna edáfica, bem como sua distribuição vertical, em área de restinga periodicamente inundada na Ilha da Marambaia, RJ, em duas épocas distintas, verão (chuvosa) e inverno (seca). Foram coletadas 10 amostras de serapilheira e de solo na profundidade de 0-5 cm, em que foram feitas extrações da fauna por meio de extratores do tipo Berlese-Tüllgren. Observou-se aumento da abundância da fauna edáfica do período seco para o chuvoso, enquanto a riqueza de grupos taxonômicos não foi modificada. Em ambas as épocas, os grupos de maior ocorrência foram Formicidae e Collembola. Quanto à distribuição vertical, verificou-se a preferência dos organismos pelo compartimento serapilheira, no período chuvoso, e pelo solo, no período seco. A microfagia e a saprofagia representaram as principais formas de utilização dos recursos alimentares, seguidos da predação, sugerindo melhor estruturação do habitat no ecossistema. Além disso, a ocorrência de grupos que só são percebidos em ambientes não perturbados indica que o ecossistema de restinga da Ilha da Marambaia, no momento em que foi avaliado, ano de 2002, encontrava-se pouco ou nada degradado e em bom estado de conservação.Termos de indexação: serapilheira, solo, invertebrados.

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Effects of cover crop quality and quantity on nematode-based soil food webs and nutrient cycling

Cited by 147 publications

References 46 publications

Nematode community profiling as a soil biology monitoring tool in support of sustainable tomato production: A case study from South Africa

Nematode community profiling as a soil biology monitoring tool in support of sustainable tomato production: A case study from South Africa

Effect of transgenic insect-resistant maize to the community structure of soil nematodes in two field trials

Fauna edáfica em área periodicamente inundável na restinga da Marambaia, RJ

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