Cristiane Guiselini

Uso da lógica fuzzy na caracterização do ambiente produtivo para matrizes gestantes

O objetivo desta pesquisa consistiu na avaliacao do ambiente de alojamento, estimando as condicoes favoraveis ao melhor desempenho de matrizes gestantes. O experimento foi realizado no periodo compreendido entre 4-1 e 11-3-2005, em propriedade de producao industrial de suinos, localizada no municipio de Elias Fausto - SP. A pesquisa foi desenvolvida no setor de gestacao, com 24 matrizes primiparas, 12 femeas alojadas em baias individuais (T1) e 12 em baias coletivas (T2). O trabalho foi dividido em duas etapas, em funcao da forma de avaliacao dos dados: analise bioclimatica e da qualidade do ar, e estimativa dos padroes de conforto termico ambiental. As variaveis bioclimaticas T (oC), UR (%), Tgn (oC) e fisiologicas, taxa respiratoria (mov min-1) e temperatura retal (oC) apontam o sistema de confinamento em baias coletivas como o que possibilitou melhor condicionamento termico natural as matrizes em gestacao. O uso da teoria dos conjuntos fuzzy permitiu que se fizesse inferencia entre os dados resultantes do trabalho experimental com os estabelecidos pela literatura, por intermedio de base de regras, para a determinacao do conforto ambiental aplicado a matrizes na fase de gestacao.

Avaliação do conforto térmico e desempenho de frangos de corte sob regime de criação diferenciado

Esta pesquisa foi conduzida com o objetivo de avaliar tres sistemas de criacao para frangos de corte industrial, visando caracterizar o ambiente termico e o desempenho animal. O experimento foi realizado no decorrer de 42 dias, desenvolvido em modulos de producao, divididos em 15 boxes com 10 aves por box, submetidas a tres sistemas de criacao: semi-confinado com 3 m2 por ave de area de piquete (SC 3), semi-confinado com 6 m2 por ave de area de piquete (SC 6) e confinamento total (CONF). O delineamento experimental foi inteiramente casualizado (DIC) em parcelas subdivididas e medias comparadas pelo teste Tukey (P < 0,05). As variaveis meteorologicas e os indices de conforto apontam o sistema de criacao SC 3 como o que permitiu melhor condicionamento termico natural as aves, apresentando valores medios da ordem de 25,4 °C, 69,9 kJ kg-1 e 75,7 para temperatura de bulbo seco (Tbs), entalpia (h) e indice de temperatura de globo e umidade (ITGU), respectivamente. Os parâmetros fisiologicos frequencia respiratoria (mov min-1) e temperatura cloacal (°C) indicaram valores medios mais adequados nas aves submetidas ao sistema de criacao SC 3. Os sistemas de criacao promoveram alteracoes no desempenho das aves para consumo de racao (CR) e peso corporal (PC) nos sistemas SC 3 e CONF, comparativamente ao SC 6, que apresentou prejuizo no desempenho.

Bem-estar na produção de frango de corte em diferentes sistemas de criação

This research was carried out to evaluate different housing systems for broiler chickens production, characterizing the thermal environment, physiological parameters and animal behavior. The experiment was conducted in a production cycle of 42 days, in the city of Carpina, state of Pernambuco, Brazil, at the Experimental Station for Small Animals of the Federal Rural University of Pernambuco (UFRPE). The survey was developed in production module divided into 15 boxes with 10 birds per box and density of the 10 birds per m2, totaling 150 birds, submitted to the three housing systems: semi-confined with 3m2 per broiler of paddock area (SC 3), semi-confined with 6m2 per broiler of paddock area (SC 6) and total confinement (CONF). The experimental design for data general analysis was completely randomized (CRD), in split plots, being the weeks allocated in the plots and the accommodation systems (SC 3, SC 6, CONF and EXT) in the sub-plots with the averages compared through the Tukey test. The meteorological variables, comfort indexes and physiological parameters indicated the semi-confined system of accommodation SC 3 as one that allowed better natural conditioning heat to the birds, presenting the average values of 25.4oC, 69.9 kJ kg-1, 75.7, 65.12 movements min-1 and 41.92oC for dry bulb temperature, enthalpy, black globe humidity index, respiratory rate and cloacal temperature, respectively. The birds subjected to the semi-confined system SC 3 were those that had better opportunity to express their natural behavior and explore the external environment to the module of production, leveraging the animal welfare.

Climate variations in greenhouse cultivated with gerbera and relationship with external conditions

Black meshes used in greenhouses provide shade to plants, affecting photosynthesis and presenting certain properties that change the microclimatic conditions in these environments. The objective of this study was to evaluate the variation in climate elements in greenhouse cultivated with gerbera (Gerbera jamesonii, Vr. Rambo) in relation to external conditions and the reference evapotranspiration (ETo) at Teresina, State of Piaui, Brazil. The measurements were obtained from July to October 2007 by an automatic data acquisition system installed inside and outside the greenhouse. The global solar radiation, evapotranspiration, precipitation, temperature, relative humidity, and wind speed were estimated. The results showed that major effect of the shading occurred on the mean air temperature during the 120 days, making it higher than the external environment. Inside the greenhouse, mean values of relative air humidity, reference evapotranspiracao, global solar radiation and wind speed were lower compared to those outside the greenhouse.

Uso de redes neurais artificiais para predição de índices zootécnicos nas fases de gestação e maternidade na suinocultura

The objective of this work was to evaluate the precision of Artificial Neural Networks (ANNs) to estimate zootechnical indexes, based on thermal and physiological variables of pregnant sows. This study was carried out from January to April 2005, in a swine industrial production farm in the gestation section with 27 primiparous gilts, allocated in individual pens and after on farrowing pens where it was quantified animal production indexes of piglets from the study. Therefore, an ANN backpropagation was implemented, with one input layer, one hidden layer, and one output layer with tangent sigmoidal transference functions. Air temperature and respiratory frequency were considered as input variables and weight of piglet at birth and the number of mummified piglets as output variables. The trained ANN presented a great generalization power, which enabled the prediction of the answer-variables. Characterization of the environment of gestation and maternity was appropriated if compared to the real data, with few under or overestimated tendencies of some values. The use of this specialist system to predict zootechnical indexes is viable because the system shows a good performance for this use.

Greenhouse cover management: solar radiation effects on production and quality of a gerbera crop

The objective of this study was to evaluate the influence of low density polyethylene (PEBD) as a greenhouse cover in association with thermal shading screen installed in two different positions (outside and inside), cultivated with gerbera, on solar radiation (Qg), as well as on the growth and quality of gerbera plants. The experiment was carried out during two crop cycles in 2004, at ESALQ/USP, in Piracicaba, State of Sao Paulo, Brasil. A greenhouse was sub-divided into two parts and covered with PEBD differing from each other by the position of the thermal shading screen (50%), witch was installed inside (at 3 m height) and outside (covering the plastic cover). The environment with the thermal screen outside was named A1 and the other one with the thermal screen inside was named A2. The results from the two crop cycles showed that the microclimate was changed by the covers of the greenhouses. Qg inside for A1 and A2 were respectively 33.6 and 21.7 (first cycle), and 27.2 and 17.9% (second cycle) of the values measured outside. Considering the two crop cycles, the results showed that there were no differences in plant quality in both environments. However, A1 was the most favorable environment for plant quality when considering the two crop cycles, separately the results separately. Also, only gerberas from A1 showed themselves to have marketable characteristics.

Investimento em climatização na pré-ordenha de vacas girolando e seus efeitos na produção de leite

The objective of this study was to evaluate the effects of cooling of pre-milking cows on production, physiology, thermal conditioning and the cost-benefit of the Adiabatic Evaporative Cooling System (AECS). Sixteen cows were used with an average daily milk production of 18 kg, distributed in 4 x 4 Latin square design. The Tukey test (P<0.05) was utilized for comparison of means. The treatments (0, 10, 20 and 30 min.) consisted of exposure of pre-milking cows to the AECS. The dry bulb temperature (DBT, oC) and relative humidity (RH, %) were recorded every minute, which allowed the determination of the efficiency of the AECS through the temperature and humidity Index (THI) and enthalpy (h). The respiratory rate (RR), rectal temperature (RT) and temperature of the coat (TC) were measured before and after cooling. The 30 min. treatment kept the environmental variables and the comfort indexes within recommended limits. The physiological variables (RR, RT and TC) were lower in the 30 min treatment and reflected positively on milk production, which increased 4.35% compared to the control treatment (0 min). The investment was profitable having a 58 day return on investment and a monthly revenue increase of R

Bioclimatic behavior of free-range rustic broilers in enriched paddocks

1,266.84.

Zootecnia de precisão: princípios básicos e atualidades na suinocultura

Conduziu-se esta pesquisa com o objetivo de avaliar o efeito do enriquecimento ambiental em sistema de producao para frangos de corte caipira, determinando a influencia dos elementos meteorologicos e seu reflexo nos aspectos comportamentais das aves. O experimento foi realizado em 87 dias, na Estacao Experimental de Pequenos Animais da Universidade Federal Rural de Pernambuco, desenvolvido em quatro modulos de producao e cada modulo dividido em quatro boxes com 10 aves por box, totalizando 160 aves, submetidas aos modulos de producao com acesso a piquete, acesso a piquete com poleiro, acesso a piquete com sombreamento artificial e acesso a piquete com poleiro e sombreamento artificial. O delineamento experimental foi inteiramente casualizado em parcelas subdivididas e medias comparadas pelo teste Tukey. O modulo de producao com acesso a piquete com poleiro e sombreamento artificial foi aquele que permitiu melhor condicionamento termico as aves, apresentando valor medio para entalpia de 75,95 kJ kg-1, alem de promover melhor oportunidade de expressar seus comportamentos naturais e de explorar o ambiente externo ao modulo de producao, potencializando o bem-estar animal.

Análise espacial das condições térmicas do ambiente pré-ordenha de bovinos leiteiros sob regimes de climatização 1

This study was conducted with the objective of identifying the insertion of Precision Animal Production in the current pig production model and its potential to the improvement of the production system, based on engineering principles processes, as well as animals physiological, physical and biological parameters in the text the technological principles that serve as basis for precision technology and the key challenges facing the development as well as presenting several concrete examples of its international practice and in the country were addressed. It is expected, through the dissemination of interactive and dynamic systems, to cite some applications, such as animal identification, behavioral aspects, physical environment animal facilities and emissions of gases, with emphasis on improvement in performance indexes within the rules of animal welfare.