Efeitos de diferentes densidades populacionais nas estações fria e quente do ano sobre o desempenho de frangos de corte

The objective of this study was to evaluate the performance of broilers reared under different population densities in the cold and hot seasons of the year. Two identical experiments were conducted, one during the winter for 49 days, and the other during the summer where the chicks were slaughtered at 42 days of age. Commercial Hubbard broiler-type chicks were distributed in a randomized block design in a 4 × 2 factorial arrangement with population densities of 10, 14, 18, and 22 birds/m 2, by sex, and with four replications. Feed intake was reduced with a progressive decrease of available space for the chicks, and it resulted in a linear decrease in weight gain. However, there was a linear increase in the live weight of broilers in kilograms per area of floor space, proportional to the increase of population density, without effect on the viability. The progressive increment in the population density reduced the observed feed/gain ratio during the total winter rearing period for both sexes. There was no effect of population density on this characteristic during the hot season of the year. Population density did not affect the carcass yield of chicks during the summer. However, there was a linear increase on carcass yield with an increase in population density in the winter. The males, at the age slaughtered, had higher weights, feed intakes, and better feed/gain ratios, and lower abdominal fat and higher live weight production in kilograms per floor area than females. However, the viable index for the males was lower. From the results obtained, there was a linear increase in the liveweight of broilers in kilograms per floor area, making it possible to rear broilers under higher population densities, independent of the season of the year, as well as the occurrence of a decrease in feed intake and weight gain of the chicks with a decrease of available space.

Reguladores vegetais na produção de biomassa e teor de óleos essenciais em Cymbopogon citratus (DC.) Stapf, em diferentes épocas do ano

The purpose of the present research was to evaluate the effect of plant growth regulators in biomass production and essential oil yield content in lemongrass (Cymbopogon citratus (DC.) Stapf), in different seasons. The experiment was conducted on São Manuel Experimental Farm, Faculdade de Ciências Agronômicas, UNESP - Botucatu. Which plants were randomly assigned into blocks to treatments with three repetitions. The treatments consisted of GA3 (50 and 100 mg L-1); Ethrel (100 and 200 mg L-1); CCC (500 and 1000 mg L-1); Alar 85 (1000 and 2000 mg L-1); Accel (20 and 40 mg 0L-1) and control. Four applications of plant growth regulators were realized every three months. After 40 days of each foliar spray, the plants were cut to determine the fresh weight and essential oil yield. The application of plant growth regulators did not increase the biomass production, showing difference among collect periods when the major production was detected at the fourth collect (summer). The greatest essential oil yield was found at the second collect (winter). In the present study, the used concentrations of plant growth regulators did not increase biomass neither essential oil yield.

Características fotossintéticas de genótipos de capim-elefante anão (Pennisetum purpureum Schum.), em estresse hídrico

The experiment was carried out aiming to evaluate the gas exchange of dwarf elephant grass genotypes under different hydric conditions, in a randomized design with three replications. Genotypes of dwarf elephant grass (Mott, CNPGL 94-34-3 and CNPGL 92-198-7) were analyzed under two hydric conditions: irrigated (I) and non-irrigated (NI). Differences between treatments I and NI were observed for all genotypes for photosynthesis, stomatal conductance, transpiration and water vapor pressure deficit. Genotype CNPGL 94-34-3 presented highest tolerance to hydric stress, followed by Mott and CNPGL 92-198-7 genotypes. All genotypes presented high photosynthetic rate, under ideal conditions of soil humidity, thus characterizing the analyzed dwarf elephant grass genotypes as plants with high photosynthetic efficiency.

Correlação linear e espacial entre a produtividade e o teor de proteína bruta do guandu anão e os atributos de um Latossolo

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Análise das prevalências de doenças detectadas pelo programa nacional de triagem neonatal no município de Araraquara no ano de 2009

The National Neonatal Screening Program (NNSP) set up in all Brazil, aims, through planned phases of local implementation, to detect diseases such as phenylketonuria, congenital hypothyroidism, hemoglobinopathies and cystic fibrosis. The aim of this study was to assess, through a cross-sectional observational study, the prevalence of the diseases detected by the NNSP in the city of Araraquara, in records issued by the São Paulo APAE laboratory in the period between April and December 2009.The results show that Araraquara had a prevalence of phenylketonuria and congenital hypothyroidism 0.06% above the national averages of 0.01% and 0.03% respectively. With respect to hemoglobinopathies, the prevalence of sickle cell trait was 2.15% below the national average of 2.6%. The prevalence of Hb C in the city was 0.57%, similar to national values reported in the literature. Confirmed Hb Bart's had a prevalence of 0.13% in Araraquara, below the average of 0.38% for the surrounding region. The neonatal screening by heel-prick test and counseling for caregivers are important factors in reducing morbidity related to the evolution of these diseases.

Fontes e doses de giberelina no desempenho de arroz anão em biotestes

Mutant of dwarf rice (Oryza sativa L.) were treated with three different concentrations of gibberellic acid originated from two sources (Gibberellin and Pro-Gibb) and submitted to the determination of bigger height, in relation to the soil leveI. Mensurations were realized in each seven days at greenhouse conditions under mean temperature of 25°C. lt was concluded that concentrations of 10 mg L-1 of gibberellin originated from Pro-Gibb or Gibberellin was enough to promote a differentiated performance of the test plant. For the study of leaf anatomy Pro-Gibb presented, under all tested concentration, increase of mesophyll thickness in relation to Gibberellin. In this analysis, source and interaction between source and concentration applied promoted significant variations between the mean data.

A interação professor-aluno nas atividades de escrita: um estudo em salas de primeiro ano do ensino fundamental

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Criminalidade urbana e condições de vida na região administrativa de Campinas (SP) no ano de 2000: uma análise espacial

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Usos não-convencionais da vírgula em textos de alunos de quinta série/sexto ano do ensino fundamental

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Marcas de singularidade em textos escolares de alunos do 2º ano do ensino fundamental

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

A produção e a reescrita de textos: o trabalho docente e discente no quarto ano do ensino fundamental

Pós-graduação em Educação - IBRC

Ler e escrever na contemporaneidade: o que dizem estudantes do 1º ano do ensino médio de uma escola pública?

Pós-graduação em Educação - IBRC

Um retrato do primeiro ano do ensino fundamental: o que revelam crianças, pais e professoras

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Desempenho de escolares do segundo ano do ensino fundamental em provas de compreensão de leitura: elaboração de procedimento avaliativo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

O ensino do cálculo diferencial e integral na Escola Politécnica de São Paulo, no ano de 1904: uma análise documental

Pós-graduação em Educação Matemática - IGCE