15n Natural Abundance
Mostrando 1-12 de 36 artigos, teses e dissertações.
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1. Natural abundance of 15N of N derived from the atmosphere by different strains of Bradyrhizobium in symbiosis with soybean plants
RESUMO: Para quantificar a FBN em leguminosas, através da técnica de abundância natural de 15N, é importante conhecer a abundância de 15N da planta leguminosa crescida inteiramente dependente da FBN (valor ‘B’). O objetivo deste estudo foi determinar a abundância natural de 15N do N2 fixado por diferentes estirpes de Bradyrhizobium em simbiose com
Cienc. Rural. Publicado em: 25/11/2019
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2. Sugarcane inoculated with endophytic diazotrophic bacteria: effects on yield, biological nitrogen fixation and industrial characteristics
Abstract: The growing need for the use of clean energy has led society to seek alternatives to fossil fuels in order to less pollute the environment. Sugarcane has been known to produce enough biomass and to have associative microorganisms, such as plant growth-promoting bacteria (PGPB), which have the potential to improve the yield of crops. The objective
An. Acad. Bras. Ciênc.. Publicado em: 25/11/2019
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3. Biological Nitrogen Fixation by Legumes and N Uptake by Coffee Plants
ABSTRACT Green manures are an alternative for substituting or supplementing mineral nitrogen fertilizers. The aim of this study was to quantify biological N fixation (BNF) and the N contribution derived from BNF (N-BNF) to N levels in leaves of coffee intercropped with legumes grown on four family farms located in the mountainous region of the Atlantic Fores
Rev. Bras. Ciênc. Solo. Publicado em: 16/01/2017
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4. Species of Drosophila (Diptera: Drosophilidae) attracted to dung and carrion baited pitfall traps in the Uruguayan Eastern Serranías
This study investigates the species richness and abundance of Drosophila Fallén, 1823 attracted to dung and carrion baited pitfall traps in natural areas with heterogeneous habitats at the Sierra de Minas, Eastern Serranías, southeastern Uruguay. Collecting was carried out on a monthly basis (May 2002 through April 2003). Drosophilids accounted for 0.84% (
Zoologia (Curitiba). Publicado em: 2012-08
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5. Nitrogen fixation by groundnut and velvet bean and residual benefit to a subsequent maize crop.
Chemical fertilisers are rarely avaiable to poor farmers, for whom the nitrogen (N) is often the most limiting element for cereal grain production. The objective of this study was to quantify the contribution of biological nitrogen fixation (BNF) to groundnut (Arachis hypogaea) and velvet bean (Mucuna pruriens) crops using the 15N natural abundance (d15N) te
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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6. Balanço de N em rotação de culturas sob plantio direto em Dourados, MS.
Matéria seca e N total. Quantificação da FBN eficiência do uso de N fertilizante. Balanço de N para as culturas. Resultados e discussão. Quantificação da FBN para a cultura da soja. Eficiência da fertilização. Balança de N para as culturas. O objetivo do presente estudo foi avaliar o impacto da fixação biológica de nitrogênio (FBN) na cultura
Seropédica: Embrapa Agrobiologia. Publicado em: 2011
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7. Nitrogen cycling in a chronosequence formed by restored forests and a natural forest / Ciclagem do nitrogênio em uma cronosequência formada por florestas restauradas e floresta natural
A recuperação de funções e processos ecossistêmicos, entre outros atributos, é um dos indicadores mais importantes no processo de retorno de um ecossistema à sua trajetória histórica. A ciclagem de nutrientes é um atributo fundamental do ecossistema, e relaciona-se diretamente à regulação do funcionamento e do desenvolvimento dos ecossistemas e
Publicado em: 2010
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8. Soil fauna, arbuscular mycorrhizal fungi and diazotrophic bacteria in Areas of Mining of Bauxite in the Northwest Pará revegetated with palm oil. / Fauna do Solo, Fungos Micorrízicos Arbusculares e Bactérias Diazotróficas em Áreas de Mineração de Bauxita no Noroeste do Pará Revegetadas com Dendê.
The Mining is considered the activity can cause a great impact in the environment, involving the vegetation and subsoil layers remove. After the finish of mineral sources, mandatorily these areas require recovery measures. This study aimed to evaluate the initial establishment of three genotypes of palm oil: C2501, C2301 and C2528, indicated by Embrapa Amaz�
Publicado em: 2009
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9. Efeito do manejo de fogo sobre comunidades de aves em campos sujos no Parque Nacional das Emas, GO/MS, Cerrado Central / Effects of fire management on birds in Emas National Park, Brazil, Central Cerrado
Several studies have investigated the effects of natural fires on Cerrado birds. However, avian responses to fire management have not been examined. We compared birds found in firebreaks (fire managed areas) and in fire unmanaged grasslands, in Parque Nacional das Emas, Central Brazil. This is the first study to evaluate the effects of prescribed fire on the
Publicado em: 2009
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10. 15N natural abundance and biological nitrogen fixation in Caatinga tree species / AbundÃncia natural do 15N e fixaÃÃo biolÃgica do N2 em espÃcies arbÃreas da Caatinga
Pouco se sabe sobre a fixaÃÃo biolÃgica do nitrogÃnio (FBN) em Ãreas da caatinga nordestina, apesar de sua grande riqueza em leguminosas. Para ecossistemas naturais, a metodologia mais indicada em estudos da FBN Ã a da abundÃncia natural do 15N (δ15N), que permite a identificaÃÃo de plantas diazotrÃficas e estimativas das quantidades de N fixa
Publicado em: 2008
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11. Crescimento, acúmulo de nutrientes e fixação biológica de nitrogênio em Flemingia macrophylla [(Willd.) Merril]. / Growth, nutrient accumulation and biological nitrogen fixation in Flemingia macrophyla [(Willd.) Merril].
Flemingia macrophylla is an underexploited Asian legume shrub in Brazil. International literature emphasizes its high potential as component in agroforestry systems in various regions of the tropics. The objective of this dissertation is to evaluate the potential of Flemingia macrophylla as an alternative green manure to be included in agroecological based s
Publicado em: 2008
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12. Transferência do carbono de resíduos da colheita de eucalipto para frações da matéria orgânica do solo / Carbon transference from eucalypt harvest residues to soil organic matter fractions
Eucalypt plantation areas in Brazil have increased continuously over the years. The practice of removing more lignified material, such as bark and branches, from the ground after wood harvesting in eucalypt forests may prevent the stabilization of carbon (C) in recalcitrant fractions of soil organic matter (SOM). The recalcitrance of such organic fractions i
Publicado em: 2008