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Evaluation of slow release nitrogen fertilization for tall cabbage grown in autumn IPB - Escola Superior Agrária
Santos, H.; Rodrigues, M.A.; Dias, L.G.; Arrobas, Margarida.
Tall cabbage (Brassica oleracea, var. costata, cv. Penca de Mirandela) is very popular in Portugal. It forms part of the traditional Christmas Eve dinner every year. The nurseries are prepared in the middle of summer and the young plants transplanted late in August. The highest growth rates of this vegetable as well as the highest demands for nitrogen (N) occur in October and early November, a typical rainy period where there is a high risk of nitrate leaching. Therefore, the use of slow release N fertilisers may be a viable option as a sound N fertilization strategy for this production system. The objectives of the research were to examine the effect on crop yield of three materials that delay N availability to plants and also to monitor when N becomes...
Tipo: Article
Ano: 2008 URL: http://hdl.handle.net/10198/2195
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Fatty acid characterization of cyanobacterial strains isolated from Vela lake and Mondego river rice fields (central-western, Portugal) IPB - Escola Superior Agrária
Galhano, Victor; Santos, H.; Geraldes, Ana Maria; Figueiredo, Daniela R.; Crespí, António; Gomes-Laranjo, José; Peixoto, Francisco.
Tipo: ConferenceObject
Ano: 2010 URL: http://hdl.handle.net/10198/3851
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Slow-release N fertilisers are not an alternative to urea for fertilisation of autumn-grown tall cabbage IPB - Escola Superior Agrária
Rodrigues, M.A.; Santos, H.; Ruivo, Sérgio; Arrobas, Margarida.
Tall cabbage (Brassica oleracea var. costata, cv. Penca de Mirandela) is grown in Portugal during autumn and winter months when heavy rains can be expected. In this agrosystem the management of N is a considerable challenge due to the risk of nitrate leaching. Field experiments with tall cabbage and rye were carried out during the growing seasons of 2007/2008 and 2008/2009. The experimental design included three fertilisers that delay N availability by different mechanisms [Floranid permanent, containing isobutylidene diurea (IBDU); Basacote, a polymer-coated fertiliser; and Entec 26, containing 3,4-dimethylpyrazole phosphate (DMPP) as nitrification inhibitor], two urea treatments (total N applied basally; and divided into two equal rates in preplant and...
Tipo: Article Palavras-chave: Slow-release fertiliser Controlled-release fertiliser Stabilized fertiliser Isobutylidene diurea (IBDU/Isodur) 3; 4-Dimethylpyrazole phosphate (DMPP).
Ano: 2010 URL: http://hdl.handle.net/10198/2193
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The influences of forest stand management on biotic and abiotic risks of damage Inra
Jactel, H.; Nicoll, B. C.; Branco, M.; Gonzalez-Olabarria, J. R.; Grodzki, W.; Långström, B.; Moreira, F.; Netherer, S.; Orazio, C.; Piou, D.; Santos, H.; Schelhaas, M. J.; Tojic, K.; Vodde, F..
•  Cette revue bibliographique s'intéresse aux effets de la sylviculture sur la sensibilité des peuplements forestiers aux principaux agents de dégâts biotiques et abiotiques que sont les mammifères herbivores, les insectes ravageurs, les champignons pathogènes, le feu et les vents forts.• Les pratiques forestières analysées sont la sélection et la préparation des sites de reboisement, la définition de la composition en essences et le choix du matériel génétique, les méthodes de régénération et d'entretien, les modalités d'éclaircie et d'élagage, le mode de récolte finale. L'influence de chacune de ces opérations sur l'occurrence des agents de dégâts biotiques et abiotiques et sur la sensibilité des peuplements est examinée ainsi que les processus...
Tipo: Journal Article Palavras-chave: PEUPLEMENT FORESTIER; PRATIQUE FORESTIÈRE; ENNEMI NATUREL; DÉGÂT SANITAIRE; PEUPLEMENT; SENSIBILITÉ; HERBIVORES; PATHOGÈNES; VENT; FEU SILVICULTURE; STAND; OCCURRENCE; SUSCEPTIBILITY; PEST; PATHOGEN; WIND; FIRE.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009294d2729&uri=/notices/prodinra1/2009/12/
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