Ploughing effects on soil organic matter after twenty years of conservation tillage in Lower Saxony, Germany

Stockfisch, Nicol; Forstreuter, T; Ehlers, W.

doi:10.1016/s0167-1987(99)00063-x

Cited by 130 publications

(67 citation statements)

References 30 publications

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“…This difference was already apparent after 3 years of our trial 26 and became smaller than the differentiation by C org . This confirmed the results obtained by Stockfisch et al 38 , who consider the C mic -to-C org ratio to be an early indicator of an enhancement of C org . Angers et al 40 found a C mic -to-C org ratio three times greater under RT compared to CT in 0-16 cm after 11 years of silage maize rotation and low input of organic matter.…”

Section: Soil Microbial Biomass and Activitysupporting

confidence: 92%

“…A strong differentiation of the microbial biomass between tilled and untilled layers under RT was found in the present experiment; this corresponds with the results obtained by other authors 9,25,51,52 . While we also found greater microbial biomass C in the 10-20 cm soil layer, others reported no difference 9 in ATP contents 36 or less microbial biomass 25,38 in the untilled layer. Microbial biomass is strongly affected by freshly added organic matter 52 .…”

Section: Soil Microbial Biomass and Activitycontrasting

confidence: 59%

See 1 more Smart Citation

Impact of reduced tillage on soil organic carbon and nutrient budgets under organic farming

Gadermaier

Berner

Fließbach

et al. 2011

Renew. Agric. Food Syst.

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No-tillage (NT) and reduced tillage (RT) systems are well-known management tools for reducing soil erosion and improving soil fertility. NT and RT may improve the environmental and economic performance of organic farming, but they are still not common practice among organic farmers. This paper presents the effects of tillage [RT versus conventional tillage (CT)], fertilization (slurry versus manure compost) and biodynamic preparations (with versus without) on soil fertility indicators such as soil organic carbon (C org ), microbial biomass and microbial activity, soil nutrients and nutrient budgets in an organic farming system during the first six-year crop rotation period of a long-term experiment on a clayey soil in a temperate climate. RT caused stratification of soil organic carbon (C org ), microbial properties and soil nutrients in the soil profile. Under RT, C org in the 0-10 cm soil layer increased from 2.19 to 2.61% (w/w) from 2002 to 2008, whereas it remained constant under CT. In both tillage treatments, C org remained constant in the 10-20 cm soil depth. Microbial biomass C increased by 37% under RT in the 0-10 cm soil depth and microbial activity [dehydrogenase activity (DHA)] was enhanced by 57%. Soil microbial biomass C and DHA in the 10-20 cm soil depth were also higher under RT (+ 10 and + 17%, respectively). Soluble soil P and K were 72 and 40%, respectively, higher in 0-10 cm soil depth under RT when compared with CT. Fertilization showed no effects on the measured soil properties. Biodynamic preparations increased solely the C mic -to-N mic (soil microbial biomass C to soil microbial biomass N) ratio by 7% in the 0-10 cm soil depth. Nutrient budgets for P were balanced in all treatments, but N and K exports were higher under RT compared to CT. We conclude that RT is a suitable method for increasing indicators of soil fertility in organic farming systems. The combined effects of RT and an organic farming system with a diverse, ley-based crop rotation and organic fertilization merit further promotion and it may be considered for supporting actions by the agricultural policy schemes.

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Section: Soil Microbial Biomass and Activitysupporting

confidence: 92%

Section: Soil Microbial Biomass and Activitycontrasting

confidence: 59%

Impact of reduced tillage on soil organic carbon and nutrient budgets under organic farming

Gadermaier

Berner

Fließbach

et al. 2011

Renew. Agric. Food Syst.

View full text Add to dashboard Cite

show abstract

“…Our results confirm those by Ros et al (2006b) who were able to show differences in C mic and basal respiration among the different treatments and a general decrease of these properties with soil depth. Another explanation for the lower C mic may be soil management effects since our samples were taken 7 days after ploughing, which changes the accessibility of organic matter and oxygen to the microbes (Stockfisch et al 1999;Balesdent et al 2000). Ploughing also mixes the lower soil layers low in microbial biomass with the upper soil layers.…”

Section: Basal Respiration and Microbial Biomassmentioning

confidence: 99%

Substrate-induced volatile organic compound emissions from compost-amended soils

et al. 2010

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The agronomic effects of composts, mineral fertiliser and combinations thereof on chemical, biological and physiological soil properties have been studied in an 18-year field experiment. The present study aimed at tracing treatment effects by evaluating the volatile organic compound (VOC) emission of the differently treated soils: non-amended control, nitrogen fertilisation and composts (produced from organic waste and sewage sludge, respectively) in combination with nitrogen fertiliser. Microbial community structure was determined by denaturing gradient gel electrophoresis (DGGE). Aerobic and anaerobic soil VOC emission was determined after glucose amendment using proton transfer reaction-mass spectrometry (PTR-MS). After inducing VOC production by substrate (glucose) addition and at the same time reducing oxygen availability to impair degradation of the produced VOCs, we were able to differentiate among the treatments. Organic waste compost did not alter the VOC emissions compared to the untreated control, whilst sewage sludge composts and mineral fertilisation showed distinct effects. This differentiation was supported by DGGE analysis of fungal 18S rDNA fragments and confirms earlier findings on bacterial communities. Three major conclusions can be drawn: (1) VOC patterns are able to discriminate among soil treatments.(2) Sewage sludge compost and mineral fertilisation have not only the strongest impact on microbial community composition but also on VOC emission patterns, but specific tracer VOCs could not be identified. (3) Future efforts should aim at a PTR-MS-linked identification of the detected masses.

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“…No entanto, a intervenção mecânica com preparo convencional de solo em SPD de mais de 20 anos tem resultado em menores estratificações de C no perfil de solo com menores teores de argila (Stockfisch et al, 1999;Vandenbygaart e Kay, 2004). Em regiões de clima temperado, mais de dois terços dos estoques de C em solo franco arenoso em SPD com baixos teores de C foram perdidos em poucas semanas após mobilização ocasional do solo (Vandenbygaart e Kay, 2004).…”

Section: Resultsunclassified

Revolvimento Ocasional e Calagem em Latossolo Muito Argiloso em Sistema Plantio Direto Consolidado

Fidalski

Yagi

Tormena

2015

Rev. Bras. Ciênc. Solo

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ResumoA ocorrência de concentração de nutrientes e compactação superficial tem sido relatada após longo tempo de implantação do sistema plantio direto. o objetivo deste estudo foi avaliar os atributos químicos, a densidade do solo e a produtividade das culturas subsequentes a uma única intervenção mecânica complementada com calagem de um latossolo vermelho Distroférrico textura muito argilosa conduzido em sistema plantio direto há 17 anos ininterruptos, em Pato Branco, no sudoeste do Paraná. o delineamento experimental utilizado foi de blocos ao acaso no esquema de parcelas subdivididas, com aração e gradagem do solo nas parcelas (sem e com revolvimento do solo com aração a 0,00-0,20 m e gradagem) e calagem nas subparcelas (sem e com calagem para elevar o índice de saturação por bases a 70 %). Foram avaliados a densidade do solo e a produtividade das culturas de milho (6° mês), biomassa de aveia-preta (12° mês) e soja (20º mês) e os atributos químicos do solo (6° mês). o revolvimento ocasional do solo com aração e gradagem em sistema plantio direto consolidado teve duração efêmera de seis meses na redução da densidade do solo. a incorporação do calcário não apresentou vantagens em relação à sua aplicação na superfície do solo. não houve aumentos de produtividade das culturas subsequentes à calagem e ao revolvimento do solo. as produtividades das culturas de milho, aveia-preta e soja não dependeram do revolvimento e da incorporação de calcário nessa área agrícola. Palavras-chave: compactação do solo, densidade do solo, acidez do solo, manejo do solo.Recebido para publicação em 15 de julho de 2014 e aprovado em 15 de maio de 2015.

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Ploughing effects on soil organic matter after twenty years of conservation tillage in Lower Saxony, Germany

Cited by 130 publications

References 30 publications

Impact of reduced tillage on soil organic carbon and nutrient budgets under organic farming

Impact of reduced tillage on soil organic carbon and nutrient budgets under organic farming

Substrate-induced volatile organic compound emissions from compost-amended soils

Revolvimento Ocasional e Calagem em Latossolo Muito Argiloso em Sistema Plantio Direto Consolidado

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