Query : ""

Center Filter :

  • Brazil (Universidad Federal Rural de Pernambuco)

Results 1 - 10 of 50

Order By

Search records from all Data providers
Loading...

In Brazil, as in other sugar cane (Saccharum spp.) producing countries, varieties and clones have been continuously developed and tested in order to obtain varieties better adapted to changes in climate, soils and management, seeking a better performance in soils and climates of low agricultural suitability for the culture. In this study, the initial vegetative growth and performance of five ...

SUBJECT: ambiente supressivo; suppressive environment; saccharum spp; leaf area index; índice de área foliar

POSTED TO: Revista Brasileira de Ciências Agrárias [1981-0997]

FULL TEXT AVAILABLE

A field experiment was carried out during the period from March/2005 to February/2007, in the municipality of Remígio, Paraíba State, Brazil, in order to evaluate the action of the “supermagro” biofertilizer (fresh bovine manure + water + macro and micronutrients) applied on the soil in liquid form, on the contents of soil micronutrients and sodium. The treatments were distributed in randomiz ...

SUBJECT: plant nutrition; mineral-organic fertilization; passiflora edulis; adubação organo-mineral; flavicarpa deg

POSTED TO: Revista Brasileira de Ciências Agrárias [1981-0997]

FULL TEXT AVAILABLE

The ornamental pineapple plant Ananas comosus (L.) Merr. var. ananassoides (Baker) Coppens F. Leal., belongs to the Bromeliaceae family, standing out for its ornamental potential, which is little explored economically. In vitro propagation allows a high production of pathogens-free plants. The objective of this work was to evaluate the different concentrations of 6-benzilaminopurine (BAP) and ...

SUBJECT: in vitro cropping; bap; ana; ananas comosus; bromeliaceae

POSTED TO: Revista Brasileira de Ciências Agrárias [1981-0997]

FULL TEXT AVAILABLE

The objective of this research was to evaluate the response of “camu-camu” plants (Myrciaria dubia (H.B.K.) McVaugh) through the analysis of macro (Ca, Mg, P, K and N) and micronutrients (Fe, Mn e Zn) leaf contents. The experiment was carried out in the Brasileirinho Agricultural Community, Manaus, Amazonas, Brazil. The experimental design was made in randomized blocks with a 3 x 10 split plo ...

SUBJECT: frutífera nativa; região amazônica; fertilização foliar; native fruit; foliar fertilization

POSTED TO: Revista Brasileira de Ciências Agrárias [1981-0997]

FULL TEXT AVAILABLE

The organic carbon is a major component of the soil organic matter, and its stock is influenced by the type of management system used. This study aimed to evaluate the effect of two cropping systems, with and without cover crop rotation, associated to three fertilization sources (mineral, organic and mineral+organic) in the organic and residual carbon contents of an Oxisol, in no-tillage syst ...

SUBJECT: soil management; manejo do solo; plantas de cobertura; organic matter; soil carbon stocks

POSTED TO: Revista Brasileira de Ciências Agrárias [1981-0997]

FULL TEXT AVAILABLE

The work aimed at evaluating the photosynthates allocation using the stable carbon 13 isotope as marker, as well as evaluating the source-sink dynamics in the different organs in Ficus carica L. plants in the reproductive stage. A fig tree leaf considered adult by the photosynthetic characterization with a portable photosynthesis meter IRGA-6400 was put inside an acrylic chamber, built specif ...

SUBJECT: carbohydrates reserve; ficus carica l.; 13c translocation; translocação de 13c; reservas de carboidratos

POSTED TO: Revista Brasileira de Ciências Agrárias [1981-0997]

FULL TEXT AVAILABLE

The work evaluated the translocation and allocation period of the photosynthates, using the carbon-13 stable marker, in Ficus carica L. cv. Roxo de Valinhos plants in the reproductive stage. A fig tree leaf considered adult was enriched with 13CO2 for 30 minutes in a controlled atmosphere and the respective plants were collected after 6, 24, 48, 72, 120, 168 and 360 hours of enrichment. After ...

SUBJECT: carbohydrates reserve; ficus carica l.; 13c translocation; translocação de 13c; reservas de carboidratos

POSTED TO: Revista Brasileira de Ciências Agrárias [1981-0997]

FULL TEXT AVAILABLE

Understanding basic information on weed biology contributes to the implementation of appropriate management and control strategies. Thus, this work was developed to evaluate the germination of Spermacoce latifolia Aubl. seeds, an important weed in reforestation areas. The seeds were subjected to dormancy break treatments, in which the mechanical scarification, chemical treatment (H2SO4 and KN ...

SUBJECT: scarification; light quality; qualidade de luz; estresse hídrico; temperature

POSTED TO: Revista Brasileira de Ciências Agrárias [1981-0997]

FULL TEXT AVAILABLE

This study aimed to select progenies of sugarcane based on agroindustrial performance and to correlate agroindustrial characters. The experiment was carried out at the Usina São José, Igarassu, Pernambuco, Brazil, during the 2008/2009 crop year. The experiment was conducted in a completely randomized block design, with five replications. The analyzed variables were: tons of cane per hectare ( ...

SUBJECT: combination of characters; saccharum spp; melhoramento genético; genetic improvement; associação de caracteres

POSTED TO: Revista Brasileira de Ciências Agrárias [1981-0997]

FULL TEXT AVAILABLE

Soil vegetation cover promoted by Brachiaria brizantha can reduce the incidence of weeds in the cropping area. Thus, the objective of the present study was to evaluate the effects of corn intercrop with Brachiaria brizantha in different sowing rates on the incidence of weeds. The experiment was carried out in a field experiment in a soil classified as an Oxisol. The experimental design was ma ...

SUBJECT: cobertura do solo; braquiária; brachiaria; zea mays; soil cover

POSTED TO: Revista Brasileira de Ciências Agrárias [1981-0997]

FULL TEXT AVAILABLE