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| Registros recuperados: 26 | |
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| Mayer, Jochen; Jarosch, KA.; Hammelehle, Andreas; Dubois, David; Gunst, Lucie; Bosshard, C.; Frossard, Emmanuel; Mäder, Paul; Oberson, Astrid. |
| N-balances over 35 years from the DOK trial are presented and combined with Nstock changes in DOK treatments on different fertilisation levels. Results strongly indicate an N efficiency-sustainability dilemma: DOK treatments with a high nitrogen use efficiency (NUE) lose more soil stock N than those with a lower NUE but higher N losses from the system. The biodynamic system showed little advantage in terms of soil N stocks sustainability while the solely mineral fertilised conventional treatment had highest NUE across all inputs including soil N change. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Biodiversity and ecosystem services; Farm nutrient management. |
| Ano: 2017 |
URL: http://orgprints.org/31925/1/Stickstoffbilanzen%20in%20biologischen%20und%20konventionellen.pdf |
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| Pistocchi, Chiara; Mészáros, Éva; Tamburini, Federica; Frossard, Emmanuel; Bünemann, Else Katrin. |
| Understanding the mechanisms underlying phosphorus (P) availability is important to predict forest productivity in a changing environment. We quantified P fluxes and traced P from plant litter into inorganic and organic soil P pools in organic horizons from two contrasting temperate forest soils with low and high inorganic P availability, respectively. We incubated the two organic horizons with and without litter after labelling the soil solution with 33P and performed sequential extractions at several time points in order to trace P dynamics in labile (water-extractable, available and microbial P) and non-labile (non-living organic P, P bound to iron and aluminium and P bound to calcium) pools. Under low P availability, P fluxes were dominated by gross P... |
| Tipo: Journal paper |
Palavras-chave: Soil quality. |
| Ano: 2018 |
URL: http://orgprints.org/34708/1/Pistocchi-etal-2018-SoilBiolBiochem-Vol126-p64-75.pdf |
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| Meyer, Gregor; Bünemann-König, Else; Frossard, Emmanuel; Maurhofer, Monika; Mäder, Paul; Oberson, Astrid. |
| Inoculation with phosphorus (P) solubilizing bacteria is being proposed to increase P availability for plants by mineralization and solubilization of non-available soil and fertilizer P. Solubilization of inorganic P compounds by bacterial strains has repeatedly been shown on agar plates and in liquid media. However, the effects of inoculation on P availability to plants growing in soils, either in pot or field studies, are inconsistent and do not allow to separate between direct effects on P availability and indirect effects such as improved plant health. This differentiation could be achieved using 33P isotopic labeling. We applied the 33P isotopic dilution method in a pot and in an incubation experiment to study gross P fluxes in a calcareous soil... |
| Tipo: Journal paper |
Palavras-chave: Composting and manuring; Soil. |
| Ano: 2017 |
URL: http://orgprints.org/30745/1/Meyer%20et%20al%202017.pdf |
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| Keller, Martina; Oberson, Astrid; Frossard, Emmanuel; Mäder, Paul; Mayer, Jochen; Bünemann, Else K.. |
| The impact of cropping systems on soil phosphorus (P) forms and P dynamics was studied. The systems were a biodynamic (DYN), a bioorganic (BIO), a conventional (CON), a stockless system (MIN) and an unfertilized control (NON). These cropping systems are part of the DOK field trial in Therwil near Basel. The systems differed in fertilization and plant protection. The P budgets over 30 years were negative except for CON and increased in the order: NON < DYN < ORG < MIN < CON. A sequential P extraction scheme was used to characterize the P forms in soil samples from 2007 and 1977 (before the start of the trial). Labile inorganic P (Pi) forms differed significantly between cropping systems. Organic P forms (Po) and stable Pi forms were not... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Soil; Composting and manuring. |
| Ano: 2009 |
URL: http://orgprints.org/14255/1/Keller_14255.pdf |
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| Ragot, Sabine A.; Kertesz, Michael A.; Mészáros, Éva; Frossard, Emmanuel; Bünemann, Else K.. |
| Alkaline phosphatases such as PhoD and PhoX are important in organic phosphorus cycling in soil. We identified the key organisms harboring the phoD and phoX genes in soil and explored the relationships between environmental factors and the phoD- and phoX-harboring community structures across three land uses located in arid to temperate climates on two continents using 454-sequencing. phoD was investigated using recently published primers, and new primers were designed to study phoX in soil. phoD was found in 1 archaeal, 13 bacterial and 2 fungal phyla, and phoX in 1 archaeal and 16 bacterial phyla. Dominant phoD-harboring phyla were Actinobacteria, Cyanobacteria, Deinococcus-Thermus, Firmicutes, Gemmatimonadetes, Planctomycetes and Proteobacteria, while... |
| Tipo: Journal paper |
Palavras-chave: Soil quality; Environmental aspects. |
| Ano: 2017 |
URL: http://orgprints.org/32317/1/ragot-etal-2017-FEMS-Vol93-Issue1-fiw212.pdf |
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| Oberson, Astrid; Frossard, Emmanuel; Mayer, Jochen; Flura, Thomas; Mäder, Paul; Lüscher, Andreas. |
| Because of lower nitrogen (N) input it is assumed that organically cultivated legumes fix more N2 than legumes grown under conventional cropping. Using the natural 15N abundance method, we assessed symbiotic N2 fixation by white and red clover. The clover was growing in a grass-clover meadow installed as part of the crop rotation of a long term (30 years) field experiment. Dry matter yields were similar for organic and conventional meadows on plots fertilized at levels typical for the respective system, but organic meadows tended to higher clover yields. The proportion of N derived from atmosphere (Ndfa) in both clover species was on average 84%. It was not significantly affected by the cropping system. Because of more legumes, amounts of fixed N2... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Pasture and forage crops. |
| Ano: 2009 |
URL: http://orgprints.org/14215/1/Oberson_14215.pdf |
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| Keller, Martina; Oberson, Astrid; Annaheim, Kathrin E.; Tamburini, Federica; Mäder, Paul; Mayer, Jochen; Frossard, Emmanuel; Bünemann, Else K.. |
| Lower P-input levels in organic than conventional farming can decrease soil total and available P, which can potentially be resupplied from soil organic P. We studied the effect of 30 y of conventional and organic farming on soil P forms, focussing especially on organic P. Soil samples (0–20 cm) were taken in a field experiment with a nonfertilized control, two organic systems receiving P inputs as animal manure, and two conventional systems receiving only mineral P or mineral P and manure. Soils were analyzed for total, inorganic, organic, and microbial P, by sequential P fractionation and by enzyme additions to alkaline soil extracts. Samples taken prior to starting the experiment were also analyzed. Average annual P balances ranged from –20 to +5 kg... |
| Tipo: Journal paper |
Palavras-chave: Soil quality; Crop husbandry. |
| Ano: 2012 |
URL: http://orgprints.org/21783/1/keller-etal-2012-JPlantNutrSoilSci-Vol175-p385-393.pdf |
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| Grüter, Roman; Costerousse, Benjamin; Bertoni, Angelina; Mayer, Jochen; Thonar, Cécile; Frossard, Emmanuel; Schulin, Rainer; Tandy, Susan. |
| Zinc (Zn) deficiency in human populations depending on cereals as a main source of Zn is a global malnutrition problem. In this field study, we investigated the potential of green manure application to increase soil Zn availability and wheat grain Zn concentrations (biofortification) on a Luvisol with different long-term fertilizer management. We also studied cadmium (Cd), as wheat is a major contributor of this undesired non-essential element to human diets. Clover (Trifolium alexandrinum L.), mustard (Sinapis alba L.) or no green manure was grown on field plots which had been managed with farmyard manure or mineral fertilizers for 65 years in Switzerland. After green manure incorporation into the soil, spring wheat (Triticum aestivum L.) was grown on all... |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Composting and manuring Nutrient turnover. |
| Ano: 2017 |
URL: http://orgprints.org/32663/1/greuter-etal-2017-SciTotalEnv-vol599-600-p1330-1343.pdf |
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| Nanzer, Simone; Frossard, Emmanuel; Bosshard, Christine; Dubois, Davie; Mäder, Paul; Oberson, Astrid. |
| In organic cropping systems nitrogen (N) often limits agricultural production. N2 fixing crops present an important option to improve N supply and to maintain soil fertility. We investigated N2 fixation of soybean in conventional and organic cropping systems. The study was carried out on a long term field experiment, characterized by unequal fertilization rates and soil microbial activity for the different systems. We assessed the proportion of N derived from atmosphere (Ndfa) and the total amount of N symbiotically fixed (Nfix) using the 15N natural abundance method. Ndfa for soybean was low, ranging from 24 to 54%. The lowest Ndfa was reported for the exclusively mineral fertilized, and the highest for the bio-organic cropping system. However,... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farm nutrient management. |
| Ano: 2009 |
URL: http://orgprints.org/14124/1/Nanzer_14124.pdf |
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| Frick, Hanna; Oberson, Astrid; Frossard, Emmanuel; Wettstein, Hans-Rudolf; Bünemann, Else K.. |
| Background • Nitrate leaching threatens both the environment and drinking water quality • Switzerland ca. 380,000 ha with > 25 mg nitrate/L in groundwater (quality criteria for drinking water) [1]; the Gäu region (Canton Solothurn) is especially vulnerable • Organic fertilizers (slurry, farmyard manure, etc.) might entail considerably increased leaching risks due to variable nitrogen (N) content and availability • Aim: increase N use efficiency, simultaneously reduce leaching |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Composting and manuring; Air and water emissions. |
| Ano: 2018 |
URL: http://orgprints.org/34860/1/Poster_Hanna_A0_1806_light.pdf |
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| Langmeier, Monika; Frossard, Emmanuel; Kreuzer, Michael; Mäder, Paul; Dubois, David; Oberson, Astrid. |
| Nitrogen nutrition of plants in organic farming depends largely on animal manure. In a pot experiment the hypothesis was tested that on a long-term organically managed soil (ORG) characterized by higher soil microbial activity, a greater portion of N applied as cattle manure is mineralized and taken up by plants than on a conventionally managed soil that had received exclusively mineral fertilizers (MIN). Dry matter yields and N uptake by Italian ryegrass were higher by around 20% on ORG than MIN soil. The N utilization of 15N labeled animal manure components and mineralNdiffered little between ORG and MIN. The major part of the increasedNuptake on ORG compared with MIN was due to a significantly greater N supply from ORG soil. The increased capacity of... |
| Tipo: Journal paper |
Palavras-chave: Composting and manuring; Soil. |
| Ano: 2002 |
URL: http://orgprints.org/26768/1/Langmeier_et_al_2002_A.pdf |
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| Mathu, Samuel; Thonar, Cécile; Vanlauwe, Bernard; Messmer, Monika; Frossard, Emmanuel. |
| Introduction In Kenya, cowpea is the most important pulse crop in the dry lands of Eastern and Coastal regions where it is commonly inter cropped with maize and sorghum. The poor yields obtained in small holder farms in Kenya (150 kg ha-1) can in part be attributed to the use of poor yielding varieties, low soil fertility (mainly N and P deficiency) low presence of effective indigenous rhizobia and high occurrence of highly competitive but inefficient indigenous rhizobia strains. Biological nitrogen fixation (BNF) through exploitation of the rhizobia-legume symbiosis and use of inoculants coupled with soil amendments such as Phosphorus offers in part a means to improve cowpea yield, nutrition and soil fertility. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality Breeding; Genetics and propagation Africa. |
| Ano: 2012 |
URL: http://orgprints.org/22169/1/mathu-etal-2012-Poster-ISFM-nairobi-kenya.pdf |
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| Welc, Monika; Bünemann, Else K.; Fließbach, Andreas; Frossard, Emmanuel; Jansa, Jan. |
| Microbial communities are important components of terrestrial ecosystems. The importance of their diversity and functions for natural systems is well recognized. However, a better understanding of successional changes of microbial communities over long time scales is still required. In this work, the size and composition of microbial communities in soils of a deglaciation chronosequence at the Damma glacier forefield were studied by fatty acid profiling. Soil fatty acid concentrations clearly increased with soil age. The abundances of arbuscular mycorrhizal fungi (AMF), bacteria and other soil fungi, however, were more affected by abiotic soil parameters like carbon content and pH than by soil age. Analysis of ratios of the different microbial groups (AMF,... |
| Tipo: Journal paper |
Palavras-chave: Soil quality. |
| Ano: 2012 |
URL: http://orgprints.org/21946/1/welc-etal-2012-SoilBioloBiochemistry-49-p184-192.pdf |
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| Mayer, Jochen; Oberson, Astrid; Lüscher, Andreas; Frossard, Emmanuel; Hammelehle, Andreas. |
| We investigated the effect of organic versus conventional cropping systems on the below ground nitrogen inputs of Trifolium pratense L., its transfer to corresponding grass and the fate in the soil organic matter in the clover-grass ley of the DOK long term experiment, Switzerland. BGN tended to be largest in conventional and organic treatments with standard fertilisation and decreased with lower fertilisation intensity. The largest amount of clover N transferred to grass was observed in the minerally fertilised conventional treatment. Clover N derived from rhizodeposition was rapidly stabilised in all treatments to clay rich fractions and thus clover N will have a relatively low direct N contribution to subsequent nonlegumes. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover. |
| Ano: 2014 |
URL: http://orgprints.org/24030/1/24030_MM.pdf |
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| Registros recuperados: 26 | |
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