Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados 21 (3) Autor Frossard, E. (3) Mäder, P. (3) Nanzer, S. (3) Oberson, A. (3) Bosshard, C. (2) Dubois, D. (1) Mayer, J. (1) Meyer, G. (1) Randall, D.G. (1) Sørensen, P. (1) Udert, K.M. (1) Mais... Palavra-chave Composting and manuring (1) Nutrient turnover (1) Nutrient turnover Cereals (1) Pulses and oilseeds (1) Soil (1) Tipo do documento Journal paper (3) Ano 2018 (1) 2009 (1) 2007 (1) País Germany (3) Idioma Alemão (1) Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Nitrogen use efficiency of 15N-labelled sheep manure and mineral fertiliser applied to microplots in long-term organic and conventional cropping systems 21 Bosshard, C.; Sørensen, P.; Frossard, E.; Mayer, J.; Mäder, P.; Nanzer, S.; Oberson, A.. Nitrogen (N) utilisation by crops has to be improved to minimize losses to the environment. We investigated N use efficiency of animal manure and mineral fertiliser and fate of fertiliser N not taken up by crops in a conventional (CONMIN) and a bioorganic (BIOORG) cropping system of a long-term field experiment over three vegetation periods (winter wheat–soybean–maize). Microplots planted with wheat received a single application of 15N-labelled slurries (either urine or faeces labelled) or mineral fertiliser. At the end of each vegetation period we tested whether higher microbial activity and larger microbial biomass in BIOORG than CONMIN soils, and lower long-term N input level in BIOORG, affected use efficiency and fate of fertiliser N not taken up by... Tipo: Journal paper Palavras-chave: Soil. Ano: 2009 URL: http://orgprints.org/26369/1/Bosshard_etal_2009_NCA83.pdf Symbiotic N2 fixation by soybean in organic and conventional cropping systems estimated by 15N dilution and 15N natural abundance 21 Oberson, A.; Nanzer, S.; Bosshard, C.; Dubois, D.; Mäder, P.; Frossard, E.. Nitrogen (N) is often the most limiting nutrient in organic cropping systems. N2 fixing crops present an important option to improve N supply and to maintain soil fertility. In a field experiment, we investigated whether the lower N fertilization level and higher soil microbial activity in organic than conventional systems affected symbiotic N2 fixation by soybean (Glycine max, var. Maple Arrow) growing in 2004 in plots that were since 1978 under the following systems: bio-dynamic (DYN); bio-organic (ORG); conventional with organic and mineral fertilizers (CON); CON with exclusively mineral fertilizers (MIN); non-fertilized control (NON). We estimated the percentage of legume N derived from the atmosphere (%Ndfa) by the natural abundance (NA) method. For... Tipo: Journal paper Palavras-chave: Nutrient turnover Cereals; Pulses and oilseeds. Ano: 2007 URL: http://orgprints.org/13460/1/oberson-etal-2007-plant-and-soil_290_69-83.pdf Water soluble phosphate fertilizers for crops grown in calcareous soils - an outdated paradigm for recycled phosphorus fertilizers 21 Meyer, G.; Frossard, E.; Mäder, P.; Nanzer, S.; Randall, D.G.; Udert, K.M.; Oberson, A.. Background and aims The current paradigm for phosphorus (P) fertilizers applied to calcareous soil is that almost entirely water soluble P fertilizers are efficient and sparingly soluble P fertilizers are not efficient P sources for crops. We hypothesize that this paradigm does not apply to recycled P fertilizers and that other P pools can explain the plant use of recycled P fertilizers on calcareous soil. Methods We applied 33P isotopic dilution method to evaluate recycled P fertilizers based on plant P uptake from fertilizer relative to plant uptake from a water soluble P reference fertilizer. The predictability of fertilizer effectiveness based on sequentially extracted P forms and X-ray diffraction pattern of recycled fertilizers derived from sewage... Tipo: Journal paper Palavras-chave: Composting and manuring; Nutrient turnover. Ano: 2018 URL: http://orgprints.org/32919/1/Meyer2018-Water%20soluble%20phosphate%20fertilizers%20for%20crops%20grown%20in%20calcareous%20soils%20%E2%80%93%20an%20outdated%20paradigm%20for%20recycled%20phosphorus%20fertilizers.pdf Registros recuperados: 3 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco