Effects of fertilizer and spatial heterogeneity in soil pH on microbial biomass indices in a long-term field trial of organic agriculture

Heinze, Stefanie; Raupp, Joachim; Joergensen, Rainer Georg

doi:10.1007/s11104-009-0102-2

Cited by 136 publications

(72 citation statements)

References 62 publications

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“…The application of manure in the present experiment-in contrast to the stockless experiment described by Emmerling 25 , which was also conducted under organic farming conditions with a ley-based crop rotation-may have been a crucial factor in the dynamics of the microbial populations. Heinze et al 54 found enhanced microbial biomass as a result of application of manure.…”

Section: Soil Microbial Biomass and Activitymentioning

confidence: 99%

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 Activitymentioning

confidence: 99%

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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“…Thus, pH has an important effect on microbial populations, especially on bacteria, which reduce their growth rates, biomass, and diversity as pH decreases (Rousk et al, 2009). Farm 2 and F3 had lower pH values than F1, probably because of their higher inputs of inorganic fertilizers (Table 1) (Heinze et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Soil Microbial Community Structure and Diversity in Cut Flower Cultures Under Conventional and Ecological Management

Santamaría

Parrado

López

2018

Rev. Bras. Ciênc. Solo

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Microorganisms are excellent soil quality indicators because their properties within the soil community change quickly in response to changes in the surrounding environment. The aim of this study was to determine if the structure and diversity of soil bacterial and fungal communities were useful for discriminating cut flower cultures under conventional (CM), ecological (EM), and intermediate (IM) management practices.Results obtained by PCR-DGGE revealed that bacteria had lower similarity in structure and higher diversity under EM than under CM. Sites under IM showed greater similarities in structure and diversity to the site under CM, although there were still significant differences between them. Fungal structure showed higher similarity among sites, with differences in diversity only between EM and CM. In the sites studied, bacteria, rather than fungi, were good indicators of changes in soil quality. The results of this study confirmed that EM and IM promote soil bacteria diversity.

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“…The negative effects of fertilization may have been caused by direct toxicity and changes in pH due to ammonium-based fertilizers. According to Heinze et al [36], the application of mineral fertilizers resulted in a significantly decreased soil pH, which is an important regulator of the development of soil microorganisms because it affects the solubility of various mineral substances, simultaneously influencing their absorbability. Therefore, the pH value ( Fig.…”

Section: Soil Microorganismsmentioning

confidence: 99%

The Influence of Trichoderma on the Phytosanitary Status of Soil and Yield of Red Beets (Beta vulgaris L. subsp. vulgaris)

Wolna-Maruwka¹,

Piechota²,

Dach³

et al. 2017

Pol. J. Environ. Stud.

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Our article describes a study on the influence of mineral and organic fertilisation and three strains of Trichoderma sp. isolated from Polish soils on the count of moulds, including the Fusarium and Alternaria genera, as well as the soil fertility index and the yield of red beets. Apart from that, the aim of the study was to assess the interaction between Trichoderma sp. and plant pathogens. A field experiment was performed on haplic luvisols soil in 11 combinations: a control sample, a variant with a mineral fertiliser, one with manure and eight variants where tomato or onion waste composts were applied. Some of them were inoculated with Trichoderma atroviride (T1) and/or T. harzianum (T2 and T3) isolates. The total count of moulds and the counts of Trichoderma sp., Fusarium sp., and Alternaria sp. in the soil were the most strongly influenced by the addition of mineral fertiliser and manure. On the other hand, the values of the soil fertility index were the highest in the soil enriched with manure, followed by the soil combinations with tomato waste composts. Vegetable waste composts applied to the soil proved to be good carriers of Trichoderma sp. isolates. The study did not prove any antagonistic effect of Trichoderma sp. isolates on the proliferation of Alternaria sp.

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Effects of fertilizer and spatial heterogeneity in soil pH on microbial biomass indices in a long-term field trial of organic agriculture

Cited by 136 publications

References 62 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

Soil Microbial Community Structure and Diversity in Cut Flower Cultures Under Conventional and Ecological Management

The Influence of Trichoderma on the Phytosanitary Status of Soil and Yield of Red Beets (Beta vulgaris L. subsp. vulgaris)

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