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| Registros recuperados: 882 | |
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| COLOMB, Bruno; Jouany, Claire; Prieur , Loic. |
| Soil phosphorus (P) fertility management in organic cropping systems is a debated issue in the general context of decreasing resources in a near future. A survey showed that in Midi-Pyrenees a majority of stockless organic cropping systems present overdrawn P balances. We investigated the impacts of P balances on the soil plant available P and nutrition status on the long-term field experiment of La Hourre (CREAB, Auch, France), which is representative of rainfed systems set on clayey calcareous soils. The changes in soil plant available P were monitored between 2002 and 2012 using P Olsen soil test. The results specified the declining rate of P availability in time and according to the amplitude of the negative balance. The levels of soil available P did... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover; Soil. |
| Ano: 2013 |
URL: http://orgprints.org/26231/1/Colomb_2013_CIAG_Vol32.pdf |
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| Thyme, Mette; Ambus, Per. |
| In organic dairy farming, a major N input to the plant-soil system comes from biological N2 fixation by pasture legumes, but knowledge is sparse on how much of the fixed N2 is lost from the pastures as N2O. Nitrifying and denitrifying bacteria are the main contributors to the N2O production in soils. Currently, no contribution from biological N2 fixation in legume pastures is included in the national N2O inventories, partly because of uncertainties in quantifying the N2 fixation in the pastures (Mosier et al., 1998). According to the guidelines issued by The Intergovernmental Panel on Climate Change (IPCC), inventories for N2O emissions from agricultural soils should be based on the assumption that 1.25 % of added N is emitted as N2O (IPCC, 1997). The... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Pasture and forage crops; Air and water emissions. |
| Ano: 2004 |
URL: http://orgprints.org/4147/1/4147.pdf |
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| CASALI, C.A.; KAMINSKI, J.; SANTOS, D.R.; CALEGARI, A.; TIECHER, T.; PICCIN, R.; BELLINASO, R.J.S.. |
| O objetivo do presente trabalho foi avaliar a liberação de P a partir da decomposição dos resíduos de plantas de cobertura. Em setembro de 2011, em um experimento instalado em 1986 sobre um Latossolo Vermelho aluminoférrico, no IAPAR, Pato Branco, PR, foram coletadas amostras da parte aérea das plantas de cobertura tremoço azul, ervilhaca comum, aveia branca, nabo forrageiro, centeio e trigo, manejadas sob SPD. Mediu-se a decomposição dos resíduos das plantas e a liberação de P por meio de bolsas de decomposição de poliéster, que foram coletadas aos 0,7,14,28,56 e 112 dias após o manejo das plantas. Avaliaram-se as taxas de decomposição e o tempo de meia vida da MSPA e do P. O delineamento estatístico utilizado foi de blocos casualizados com três... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover; Soil tillage; Greenhouses and coverings; Farm nutrient management. |
| Ano: 2012 |
URL: http://orgprints.org/29927/1/2012%20-%20Casali%20-%20RSBCS.pdf |
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| Johansen, Anders; Carter, Mette S.; Jensen, Erik Steen; Hauggaard-Nielsen, Henrik; Ambus, Per. |
| Soil from the Højbakkegård experimental (BioConcens) field was amended with nothing (control), each of two anaerobic digested (AD) materials (mixture of AD cattle manure and maize, mixture of AD cattle manure and cut off grass-clover material), raw cattle manure, and grass-clover in five individual treat-ments. The materials were incorporated homogeneously into the soil and sampled destructively at 0, 1, 3 and 9 days after incorporation. Besides, experiments were performed to follow the turnover of these materials, measured as accumulated respiration over a longer period. Measures included available organic soil carbon (cold- and hot-water extractable), soil mineral nitrogen concentration, soil pH, accumulated respiration over a two-week period, emission... |
| Tipo: Journal paper |
Palavras-chave: Soil quality; Nutrient turnover; Air and water emissions; Biodiversity and ecosystem services; Farm nutrient management. |
| Ano: 2011 |
URL: http://orgprints.org/18894/7/18894.pdf |
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| Im Ökologischen Landbau ist weicherdiges Rohphosphat als Phospatdüngemittel zugelassen. Die Effizienz von Rohphosphatdüngemitteln wird insbesondere durch den pH-Wert des Bodens sowie die Phosphat- und Ca-Konzentration der Bodenlösung beeinflusst. Zur Förderung und Stabilisierung der Bodenfruchtbarkeit werden die Böden gekalkt, so dass der pH-Wert mineralischer Böden meistens über 6 liegt. Kalkung dient nicht nur der pH-Wert-Stabilisierung, sondern durch die Zufuhr von Ca2+ wird auch die Bodenstruktur gefördert und stabilisiert. Darüber hinaus wirkt die Kalkung aber einer höheren chemischen Löslichkeit der Rohphosphate entgegen. Die daher auf mit Rohphosphat gedüngten Flächen (mit pH über 6) niedrigere Phosphatfreisetzung kann für die Phosphaternährung... |
| Tipo: Project description |
Palavras-chave: Crop combinations and interactions; Composting and manuring; Nutrient turnover. |
| Ano: 2023 |
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| Munkholm, Lars J.; Olesen, Jørgen E.. |
| Subsoil compaction is a widespread problem on Danish arable soils and especially in form of plough pan compaction. Subsoil compaction may reduce crop yield and quality, increase negative environmental impact (e.g. in form of increased nitrogen leaching), and reduce soil workability and traffic ability of the soil. Danish Institute of Agricultural Sciences has in a DARCOF project investigated the effect of subsoil loosening. The investigations were carried out in an organic crop rotation experiment at two sandy loams: Flakkebjerg (13% clay) and Foulum (8% clay). |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover; Soil. |
| Ano: 2005 |
URL: http://orgprints.org/7820/1/7820.PDF |
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| Das hier beschriebene Projekt ist Teil eines Verbundvorhabens, das folgende Teilprojekte umfasst: FKZ 06OE353, FKZ 06OE160. Alle in Organic Eprints archivierten Projektbeschreibungen und Veröffentlichungen zu diesem Verbundvorhaben finden Sie unter folgendem Link: http://orgprints.org/cgi/saved_search?savedsearchid=1250. Für die gesamte Bio-Branche, die Verbraucher und die Agrar-Umweltpolitik ist es wichtig zu wissen, wie klimafreundlich Betriebe des Ökologischen Landbaus wirtschaften, welche flächen- und produktbezogenen Treibhausgasemissionen auftreten und wie noch bestehende Optimierungspotenziale genutzt werden können. Während für einzelne landwirtschaftliche Teilprozesse Modelle und Analysetools zur Verfügung stehen, fehlen bisher geeignete... |
| Tipo: Project description |
Palavras-chave: Nutrient turnover; "Organics" in general; Air and water emissions. |
| Ano: 2023 |
URL: http://orgprints.org/16945/1/vTI_06OE353.doc |
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| Ricci , Marta dos Santos Freire; Oliveira, Fabio Freire de; Miranda, Simone Cordeiro de; Costa, Janaina Ribeiro. |
| Dentre os desafios do cultivo orgânico de hortaliças destaca-se o controle de plantas daninhas, devido à proibição do uso de herbicidas. Entre as invasoras, a tiririca (Cyperus rotundus L.) é de difícil controle pela sua alta competitividade. A solarização é uma alternativa para desinfestação do solo, a qual consiste em cobri-lo com plástico transparente, com bons resultados no controle da tiririca. A fim de avaliar a influência do preparo e do revolvimento do solo sobre a eficiência da solarização no controle da tiririca, bem como seu posterior efeito sobre o cultivo da cenoura, foi realizado um experimento na Fazendinha Agroecológica, em Seropédica (RJ). O experimento foi disposto em blocos ao acaso com três repetições, em arranjo fatorial 2 x 3 mais uma... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover; Crop husbandry; Soil tillage; Vegetables. |
| Ano: 2006 |
URL: http://orgprints.org/22030/1/Ricci_Produ%C3%A7%C3%A3o.pdf |
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| In 1974, the Swiss Federal Office of Agriculture (BLW) charged the former Federal Research Station for Agricultural Chemistry and Hygiene of Environment (FAC, Bern-Liebefeld) to set up a field trial in collaboration with the FiBL in order to compare the performance of organic farming systems.When FAC-Liebefeld was shut down, the Swiss Federal Research Station for Agroecology and Agriculture (FAL-Reckenholz) took over the responsibility for the DOK trial in close cooperation with FiBL. The DOK-long term trial - unique in its conception - compares the consequences of bio-organic, bio-dynamic and conventional farming systems in a randomised plot trial that has no other equivalent. Experimental samples are used by many other laboratories to develop new... |
| Tipo: Research facility description |
Palavras-chave: Nutrient turnover; Soil biology; Biodiversity and ecosystem services; Crop husbandry. |
| Ano: 2023 |
URL: http://orgprints.org/5104/1/Maeder%2D2005%2DDOK.pdf |
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| Owen, Ms. Josée; LeBlanc, Mr. Serge; Fillmore, Ms. Sherry. |
| In Canada, stockless organic vegetable cropping systems may use compost for fertility. However, information to guide growers about when nutrients become available in the soil over the growing season is lacking. Detailed analysis of plant nutrient supply was conducted over three years in a multi-site rotations experiment using two cropping sequences. The experiment compared conventional fertility treatment (synthetic fertiliser (1x N)) with organic treatments (annual compost amendment at a low (1x N) and a high rate (3x N)). Plant-available soil nutrients were captured using sequential two-week burials of ion exchange membranes. Ions were eluted and quantified. Variation in nutrient supply over time, and effects attributable to crop rotation and fertility... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover. |
| Ano: 2008 |
URL: http://orgprints.org/11798/2/Owen_11798_ed.doc |
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| Laber, Hermann. |
| Am Sächsischen Landesamt für Umwelt, Landwirtschaft und Geologie (LfULG) in Dresden-Pillnitz wurde im Winter 2017/2018 ein Brutversuch durchgeführt, bei dem der Einfluss der vorherigen Bodenbewirtschaftung auf das N- und S-Mineralisationsverhalten von Hornmehl untersucht werden sollte. Gleichzeitig wurden zwei pelletierte Düngemittel auf Schafwollbasis sowie ein pelletierter Dünger auf Weißkleebasis getestet. Die von einem Schlag, aber 0 (= Freiland), 8 bzw. 17 Jahre unter Gewächshaus-Bewirtschaftung gestandenen Böden zeigten deutliche Unterschiede im Ct-, Nt- und St-Gehalt sowie Nmin-Ausgangs-Gehalt. Überraschender Weise zeigte der Freilandboden im Brutversuch (15 °C) mit umgerechnet knapp 13 kg N/ha pro Woche eine deutlich höhere N-Nachlieferung als... |
| Tipo: Report |
Palavras-chave: Composting and manuring; Nutrient turnover. |
| Ano: 2018 |
URL: http://orgprints.org/33040/1/Brutversuch%202018.pdf |
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| Duman, İbrahim; Elmacı, Ömer Lütfi. |
| Çalışma 2001-2010 yıllarında Ege Üniversitesi Ziraat Fakültesi Menemen Araştırma Uygulama ve Üretim Çiftliğinin “organik” sertifikalı alanında yürütülmüştür. Ana bitki olarak Yalova Yağlık 28 kapya biber çeşidi, ön bitki olarak da fiğ, kırmızı lahana, marul, bakla, brokkoli, kereviz, karnabahar ve bezelye kullanılmıştır. Organik tarım yönetmeliğine uygun yürütülen çalışmada 9 yıllık süre içerisinde ön bitkilere göre elde edilen biber verim değerleri ile bazı kalite özellikleri belirlenmiştir. Her ön bitki üretiminden sonra alınan toprak örneğinde de organik madde ve bitki besin elementlerindeki değişim incelenmiştir. Çalışmadan elde edilen verilere göre, fiğ ön bitkisi desteğindeki geçiş sürecinde yüksek oranlarda (4352 kg da-1) elde edilen biber toplam... |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general; Farming Systems; Composting and manuring; Nutrient turnover; Farm nutrient management. |
| Ano: 2014 |
URL: http://orgprints.org/28153/1/Organik%20Ko%C5%9Fullarda%20Uzun%20S%C3%BCreli%20%C3%96nbitki-Sal%C3%A7al%C4%B1k%20Biber%20Kombinasyonu%20%C5%9Eeklinde%20Yap%C4%B1lan%20Yeti%C5%9Ftiricili%C4%9Fin%20Verim%20Meyve%20ve%20Toprak%20%C3%96ze.pdf |
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| Registros recuperados: 882 | |
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