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| Registros recuperados: 445 | |
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| Elmholt, S.; Schjønning, P.; Munkholm, L.J.; Debosz, K.. |
| In order to improve our understanding of soil aggregation, we have studied the relative importance of bonding and binding mechanisms, especially how they scale according to aggregate size and how they are influenced by farming system and different management options. Topsoil samples were collected from four arable sandy loam soils found as two pairs (FP1 and FP2) of neighbouring fields. One of the fields in FP2 had been grown for decades with annual cash crops without application of organic manures, while the other three fields had been managed with diversified crop rotations and manure dressings. Aggregates were segregated from the bulk soil by promoting brittle failure. The samples of soil structural units were fractionated to 4-8 mm, 0.5-1 mm and... |
| Tipo: Journal paper |
Palavras-chave: Crop combinations and interactions; Soil biology; Soil quality. |
| Ano: 2008 |
URL: http://orgprints.org/14642/1/Geoderma_2008_TwoPairs.pdf |
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| Scheller, Edwin; Cuendet, Catherine; Müller, Jens; Werren, Dagmar. |
| Fazit: Es gibt einen Austausch bzw. Kreislauf von Aminosäuren und Proteinen zwischen dem Boden, Pflanzen und der Atmosphäre. Blütenpollen dominieren im Frühling die Proteingehalte in den erdnahnen Luftschichten, während in der übrigen Jahreszeit Böden und Pflanzen die Hauptquellen zu sein scheinen. Aminosäuren und Proteine der erdnahen Luftschichten werden durch Tau und Regen auf die Pflanzen und die Böden wieder niedergeschlagen. In der Luft werden sie von Mensch und Tiereingeatmet oder über die Schleimhäute aufgenommen. In einem Ökosystem besteht ein Stoffaustausch über die erdnahen Luftschichten zwischen den einzelnen Kompartimenten, über deren Bedeutung für Mensch, Tier und Pflanzenwachstum wir noch sehr wenig wissen. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil biology. |
| Ano: 2003 |
URL: http://orgprints.org/1021/1/scheller%2D2003%2Daminosaeuren%2Dzw%2Dpfanze%2Dund%2Dboden.pdf |
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| Kuht, Jaan; Alaru, Maarika; Eremeev, Viacheslav; Talgre, Liina; Loit, Evelin; Luik, Anne. |
| Uurimistulemustest selgus, et punase ristiku allakülviga odra kasvatamine avaldas soodsat mõju mulla mikroorganismidele, suurendades mullaorganismide hüdrolüütilist aktiivsust. Mulla mikroobide hüdrolüütilise aktiivsuse (FDA) määramistulemused olid pärast punase ristiku allakülviga odra kasvatamist tavaviljeluse aladel 18,6% ja mahealadel 37,2% võrra suuremad võrreldes eelvilja (kartuli) alt vabanenud ala mullaga. Katseaastate keskmisena tõusis orgaanilise süsiniku (Corg %) sisaldus maheviljelusviisides 11,6% võrreldes tavaviljelusega. Pärast allakülviga odra kasvatamist võrreldes selle eelsega Corg sisalduses olulisi usaldusväärseid muutusi ei täheldatud. Enne allakülviga odra kasvatamist seos FDA ja Corg vahel sisuliselt puudus. Küll aga esines tugev... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farming Systems; Soil biology; Nutrient turnover; Crop husbandry. |
| Ano: 2018 |
URL: http://orgprints.org/32794/1/Kuht%20et%20al%202018.pdf |
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| Ponzio, Carlo. |
| This thesis work has the objective to study alternative ways of managing the organic matter in diverse agro-ecosystems, focusing on both quantitative and qualitative aspects. The effect of several organic matter-based farming practices, that are characteristic of the organic and biodynamic method, on biomass production, productivity, and soil microbial activity has been investigated through a multidisciplinary approach that embraced on-farm trials as well as reductionist greenhouse and laboratory experiments. The open field trials have been conducted in organic commercial farms in the Marche region and in low inputs small subsistence farms in the African Kingdom of Swaziland. In both cases, the farmers were involved as "partners" in the research, which... |
| Tipo: Thesis |
Palavras-chave: Crop combinations and interactions; Soil biology; Farm nutrient management. |
| Ano: 2011 |
URL: http://orgprints.org/18351/1/PhD_Thesis_Carlo_Ponzio_UNIVPM_Saprov.pdf |
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| Mäder, P.; Vierheilig, H.; Alt, M.; Wiemken, A.. |
| Various container systems have been described in which soil regions available to hyphae only are separated from the mycorrhizal root region by 30–60 μm mesh screens to study nutrient exchange between plants and fungi in the mycorrhizal symbiosis. The screens designed up to now prevent penetration by roots but allow easy passage of fungal hyphae as well as diffusion or mass flow of water and nutrient solutions. We tested hydrophobic microporous polytetrafluorethylene (PTFE) membranes (GORE-TEXR) with 5 to 15 μm diameter pores in an attempt to obtain a better seal between compartments and to prevent uncontrolled nutrient transport by diffusion or mass flow. We found that these membranes completely prevented diffusion or mass flow of ions between two soil... |
| Tipo: Journal paper |
Palavras-chave: Soil biology. |
| Ano: 1993 |
URL: http://orgprints.org/26785/1/Maeder_et_al_1993_PS.pdf |
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| Petersen, B.M.; Berntsen, J.; Jensen, L.S.; Hansen, S.. |
| In order to achieve predictive abilities for both short- and long-term simulations, SOM models should be developed on the basis of as large and diverse a data-set as possible. Many soil organic matter (SOM) models have parameters, where the criteria for estimating their values do not seem transparent, and few have been subject to a formal sensitivity analysis regarding the influence of parameter settings. One of the major problems in most SOM models is to estimate the soil content of very slowly decomposing or perhaps even inert organic matter ("refractory" SOM). In view of these possible limitations of present SOM models, the following model development criteria were chosen for this study: 1) use of a comprehensive data-set from both laboratory and... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil biology. |
| Ano: 2003 |
URL: http://orgprints.org/4660/1/4660.doc |
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| Marin, Aldrin Martin Pérez; Menezes, Rômulo Simões César; Silva, Emanuel Dias; Sampaio, Everardo Valadares de Sá Barreto. |
| Gliricidia sepium é uma leguminosa arbórea que tem sido utilizada em sistemas em aléias no semi-árido nordestino por apresentar bom desenvolvimento em condições de estresse hídrico. Entretanto, há pouca informação disponível sobre o efeito da introdução dessa espécie nos agroecossistemas da região. No presente estudo, objetivou-se avaliar a influência da distância de plantas de Gliricidia sepium sobre características da cultura do milho e do solo e microclima no Agreste Paraibano. O estudo foi realizado no município de Esperança (PB), em área de 0,5 ha, onde, em 1996, foram plantadas fileiras de G. sepium espaçadas 6 m entre si e com 1 m entre as árvores. Nesta área, em 2002, foram delimitadas quatro parcelas de 6 x 8 m e, em cada parcela, foi estabelecido... |
| Tipo: Journal paper |
Palavras-chave: Soil biology; Soil. |
| Ano: 2006 |
URL: http://orgprints.org/22657/1/Marin_Efeito.pdf |
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| de Vries, Franciska T.; Liiri, M.E.; Bjørnlund, Lisa; Bowker, M.A.; Christensen, Soren; Setälä, Heikki; Bardgett, Richard. |
| Soils deliver several ecosystem services including carbon sequestration and nutrient cycling, which are of central importance to climate mitigation and sustainable food production. Soil biota play an important role in carbon and nitrogen cycling, and, although the effects of land use on soil food webs are well documented, the consequences for their resistance and resilience to climate change are not known. We compared the resistance and resilience to drought — which is predicted to increase under climate change 2,7 — of soil food webs of two common land-use systems: intensively managed wheat with a bacterial-based soil food web and extensively managed grassland with a fungal-based soil food web. We found that the fungal-based food web, and the processes of... |
| Tipo: Journal paper |
Palavras-chave: Soil biology. |
| Ano: 2012 |
URL: http://orgprints.org/20882/1/20882.pdf |
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| Bach, Lisbet; Jørgensen, Helene B; Axelsen, Jørgen. |
| The effect of selective grazing by a collembolan (Folsomia fimetaria) on the reproduction and ability to degrade wheat straw by 2 species of microfungi was measured. The experiment was performed with 3 different grazing pressures and a control without grazing. The 3 grazing pressures correspond to an initial density of 10.000, 20.000 or 100.000 collembolans/m2. The density cannot however be directly related to a field density, because the soil column was only approximately 2 cm high. Results show that the most preferred fungus to F. fimetaria, Alternaria infectoria, were only affected in terms of reproduction at the highest grazing pressure of 30 collembolans (as initial density). Both respiration rates and the content of bio-available nitrogen in the... |
| Tipo: Journal paper |
Palavras-chave: Soil biology. |
| Ano: 2002 |
URL: http://orgprints.org/187/2/187.pdf |
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| Kautz, Timo; Rauber, Rolf. |
| Organic manuring with slurry from biogas plants may contribute to plant nutrition and maintenance of soil fertility in organic farming. However, the chemical properties of biogas slurry depend markedly on substrate input and process technology. The aim of this study was to gain more insights into the relationship between the quality of biogas slurry and its influences on plant and soil parameters when applied as organic ma-nure. We studied the effects of slurries from two different biogas plants on yield of maize and soil microbial activity in a two-year field experiment. The investigation took place on a loam-clay soil near Göttingen, Lower Saxony. Biogas slurry A was obtained from a biogas plant with liquid pig manure as main input, slurry B originated... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil biology; Composting and manuring. |
| Ano: 2007 |
URL: http://orgprints.org/9854/1/9854_Kautz_Vortrag.pdf |
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| Axelsen, J. |
| Vi vidste dermed, at efterafgrøder kan medføre store mængder af springhaler og mider, når de anvendes som grøngødning, men hvad med den tid de vokser på markerne? Det fik vi mulighed for at undersøge i 2000 på økologisk drevne parceller på Forsknings-center Årslev (lerjord) og i 2003 på Forskningcenter Jyndevad (sandjord), og her faldt rekorden fra 1998, idet vi fandt tætheder på op til 140.000 springhaler og 130.000 mider pr. m2 sidst på efteråret i Årslev (Figur 1). De højeste tal var fra hvidkløver, rajgræs og cikorie. Der var her tale om undersåede efterafgrøder, der havde fået lov at stå urørte i marken efter høst af hovedafgrøden. I novemberprøven var der mellem 5 og 10 gange flere dyr i disse afgrøder end i kontrollerne, der blev holdt uden... |
| Tipo: Newspaper or magazine article |
Palavras-chave: Soil biology; Biodiversity and ecosystem services. |
| Ano: 2005 |
URL: http://orgprints.org/7990/1/7990.doc |
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| Blumenstein, Benjamin; Brock, Christopher; Dannehl, Theresa; Möller, Detlev. |
| Management measures to maintain or increase soil organic matter (SOM) are generally associated with additional costs and a decreasing profitability of crop rotations. However, certain SOM-enhancing strategies may have the potential to synergistically optimize also the economic output in the short or long term. We evaluated several crop rotations and green/straw manuring systems on diverging site properties in stockless farm systems for their effects on production economics. Benefits may especially derive from an increased spatio-temporal synchronization of crop nutrient demand and nutrient supply by turning green manures into mobile fertilizers, which can even result in short term economic benefits. However, as effects do not necessarily show instantly,... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality; Soil biology. |
| Ano: 2017 |
URL: http://orgprints.org/31806/1/Humusersatzstrategien%20aus%20%C3%B6konomischer%20Perspektive1.pdf |
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| Registros recuperados: 445 | |
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