Geometric Mean Diameter
Mostrando 13-24 de 45 artigos, teses e dissertações.
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13. Corn texture and particle size in broiler diets
The objective of this study was to evaluate the effect of corn texture and the particle size on broiler performance, carcass yield, nutrient digestibility, and digestive organ morphometrics. In Experiment I, 720 male Cobb chicks were distributed in a completely randomized experimental design with a 2 x 3 factorial arrangement, consisting two corn textures (d
Revista Brasileira de Ciência Avícola. Publicado em: 2011-12
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14. Limestone and oyster shell for brown layers in their second egg production cycle
This study aimed at evaluating the effect of dietary calcium levels and the replacement of calcium sources with different particle size compositions on the performance and egg quality of brown layers in their second egg production cycle. A randomized block experimental design was applied with 12 treatments in a 3x4 factorial arrangement: three calcium levels
Revista Brasileira de Ciência Avícola. Publicado em: 2011-06
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15. Resíduo da colheita de eucalipto e fontes de cálcio na agregação do solo e na estabilização da matéria orgânica / Crop residue of eucalyptus and calcium sources on soil aggregation and stabilization of organic matter
The interaction of organic compounds with divalent cations such as calcium (Ca) may improve soil aggregation and polymerise the organic molecules, forming metal-organic complexes more stable. The effectiveness of Ca on the aggregation in forest soils, in field conditions, and the influence of different sources of Ca in decomposing residues of eucalyptus and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/07/2010
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16. Effects of corn particle size and physical form of the diet on the gastrointestinal structures of broiler chickens
The objective of this experiment was to investigate the effects of different particle sizes, expressed as Geometric Mean Diameter (GMD) of corn (0.336mm, 0.585mm, 0.856mm and 1.12mm) of mash and pelleted broiler chicken diets on the weight of the gizzard, duodenum and jejunum+ileum; on the pH of the gizzard and small intestine and on the characteristics of t
Publicado em: 2010
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17. Effect of chick weight, geometric mean diameter and sodium level in prestarter diets (1 to 7 days) on broiler performance up to 21 days of age
Seven hundred and twenty Ross 308 chicks were raised in a controlled environment room, distributed in a factorial design with 3 hatching chick weights (37, 40 and 44 g), 3 geometric mean diameter (GMD) (0.561; 0.783 and 0.997 mm) and 4 total sodium levels (Na) (0.12; 0.24; 0.36 and 0.48%) in the pre-starter diet (1 to 7 days). From 8 to 21 days (d) one singl
Publicado em: 2010
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18. Effects of calcium levels and limestone particle size on the egg quality of semi-heavy layers in their second production cycle
A 112-day trial was carried out to evaluate the effect of dietary calcium level and limestone particle size on the egg quality of 288 Hy-Line Brown semi-heavy layers, with 83 weeks of age at the beginning of the experiment. A completely randomized experimental design was applied in a 2x3 factorial arrangement, with two dietary calcium levels (3.5 and 4.0%) e
Revista Brasileira de Ciência Avícola. Publicado em: 2009-06
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19. Avaliação nutricional de farinhas de vísceras de aves e a utilização em rações de frangos de corte / Nutritional evaluation of poultry offal meal and the use in dietsof broilers
The experiments were conducted with the purpose of determining the values of energy and nutritional of poultry offal meal (POM) for broiler chickens. Initially was analyzed the composition of three POM and two trials were conducted, one for determining the rate of passage and another to determine the apparent and true metabolizable energy corrected (AMEn and
Publicado em: 2009
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20. Integrated crop-livestock and soil physical quality in Brazilian Cerrado / IntegraÃÃo Lavoura-PecuÃria e a Qualidade FÃsica do Solo na RegiÃo do Cerrado
Soil physics plays a fundamental role in conserving soil and water in agricultural landscapes and is also a key parameter for accessing the sustainability of agropastoral systems. Both pasture history and management can have a significant effect on soil physical attributes, but conclusive research on this subject remains fragmentary. This work aimed to quant
Publicado em: 2008
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21. Performance of japanese quails fed feeds containing different corn and limestone particle sizes
This study aimed at evaluating performance and egg quality of Japanese quails fed feeds containing different corn and limestone particle sizes. A total number of 648 birds in the peak of production was distributed in a random complete block experimental design, using a 2x3 factorial arrangement (2 corn particle sizes and 3 limestone particle sizes). Birds we
Revista Brasileira de Ciência Avícola. Publicado em: 2007-09
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22. Extração de oleo de Sacha inchi (Plukenetia volubilis L.) com dioxido de carbono supercritico. / Supercritical CO2 extraction of oil from seeds of Sacha inchi (Plukenetia volubilis L.).
The supercritical fluid extraction of oil from sacha inchi (plukenetia volubilis L.) seeds, using Co2 as a solvent, it is presented in this study. The objective was to investigate the main process parameters such as extraction pressure and temperature, mean particle size of (0,387, 0,595 and 0,842 mm) on the extraction yield. The extraction yield increased a
Publicado em: 2007
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23. Edaphic attributes in cultivated pasture areas in the northwest of the State of Rio de Janeiro / Atributos sedáficos em áreas de pastagem plantada em relevo movimentado no noroeste do Rio de Janeiro
One of the largest challenges of the world agriculture is to increase the productivity of several crops, to obtain larger return on the investments, with sustainability. For that, it is necessary to study how to minimize negative effects of agricultural handling and alterations in the soil functional and structural properties, and the behavior of the system
Publicado em: 2006
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24. MÃtodos de Controle de Plantas Daninhas na Cultura do Cafeeiro e seus Efeitos na AgregaÃÃo e em FraÃÃes da MatÃria OrgÃnica do Solo / Weed Control Methods in Coffee (Coffea arÃbica L.) And Yours Effects On Soil Aggregation and Soil Organic Matter Fractions.
The coffee crop expansion in Latosol occur with high invest in varieties, fertilization, irrigation and control of insects and plant diseases. The weeds in coffee crop should be control for to avoid production loss and make easier the crop management. This work aimed to study the effect of weed control methods in coffee on soil aggregation and also on soil o
Publicado em: 2005