ORCID Profile
0000-0003-0263-697X
Current Organisation
Universidade Federal de São Carlos
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Publisher: Elsevier BV
Date: 07-2010
Publisher: Informa UK Limited
Date: 04-10-2017
Publisher: Elsevier BV
Date: 09-2012
Abstract: A study was performed with 2 broiler genotypes (slow and medium growth) restricted in supplementary feed and foraging 2 different mixed vegetations (grass/clover or chicory) to identify possible benefits of herbage on nutrition during the finishing period (80 to 113 d of age). Three hundred birds were included in a 2 × 2 factorial design with groups of 25 birds replicated 3 times. The use of outdoor areas, performance, and forage intake were investigated. To identify possible differences in foraging activity, the use of the range was monitored one day per week at 4 different times of the day. Feed intake from foraging was estimated by killing 4 birds per plot (2 males and 2 females) in the morning and in the evening on 3 d during the experiment and measuring crop content. Vegetation type did not influence broiler use of the free-range area, feed intake, or performance. Differences in the use of the range area, activity level, and feed content in the crops were observed in relation to genotype, sex, age of broilers, and also the time of day. Foraging activity was positively correlated with age. Medium-growth broilers spent more time inside and closer to the broiler houses during the day with increased foraging activity during evenings, in contrast to the slow-growing broilers that showed a more uniform activity during the day. Based on the measurement of crop content it was estimated that the slow-growing genotype had a daily intake of 5 to 8 g of forage per day, whereas the medium-growing genotype had an intake of 9 g for females and 20 g for males. In conclusion, limitation of supplemented protein feed in the finishing period may be acceptable for broilers that have access to highly nutritious vegetation.
Publisher: Retratos de Assentamentos
Date: 08-2021
DOI: 10.25059/2527-2594/RETRATOSDEASSENTAMENTOS/2021.V24I2.500
Abstract: O objetivo geral deste trabalho foi avaliar a efetividade dos polos agroflorestais em assegurar a segurança alimentar dos agricultores familiares assentados, tratada de maneira la. O universo empírico deste estudo corresponde a três polos agroflorestais do município de Rio Branco-Acre, que foram selecionados em virtude de possuírem características distintas. A hipótese desta pesquisa foi que a renda agrícola seria a principal variável contributiva para a condição de segurança alimentar satisfatória dos agricultores. Foram entrevistadas 89 (oitenta e nove) famílias assentadas. O instrumento de pesquisa adotado foi um formulário semiestruturado composto por nove módulos incluindo as questões da metodologia da Escala Brasileira de Insegurança Alimentar – EBIA. Foram realizadas entrevistas abertas com gestores da administração pública municipal e estadual. Resultados da pesquisa de c o revelaram que o polo Custódio Freire apresentou melhores condições de segurança alimentar, seguido pelo polo Geraldo Fleming e Wilson Pinheiro.
Publisher: Revista Engenharia na Agricultura
Date: 11-10-2022
DOI: 10.13083/REVENG.V30I1.13864
Abstract: Mineral fertilizers are highly impactful in the agricultural sector, and animal manure can be an alternative to mitigate its impacts. The goal of this research was to estimate the potential environmental impacts on the production of soybean, maize, and wheat at the Lagoa do Sino Farm School from the Federal University of Sao Carlos, contemplating the 2016/2017 cropping season and testing the replacement of 100%, 50%, and 30% of chemical fertilization by composted cow manure. Life Cycle Assessment (LCA) was the methodology used. The functional unit was one ton of each crop produced on farm. Impacts were also assessed for one hectare of production for each agricultural product investigated and the system boundary was a cradle-to-farm gate. Impacts were assessed using the CML 2000 world+ method for abiotic depletion, global warming, acidification, and eutrophication. Chemical fertilization was the main hotspot for all crops produced. Soybean showed a potential impact of 1489 MJ, 125 kg CO2 eq., 0.6 kg SO2 eq., and 0.4 kg PO4 eq. the production of maize 1497 MJ, 197 kg CO2 eq., 1 kg SO2 eq., and 0.8 kg PO4 eq. and the production of wheat 5863 MJ, 632 kg CO2 eq., 3.3 kg SO2 eq., and 2.4 kg PO4 eq. The 30% substitution scenario was the most efficient observed since there is an increase in fuel consumption if distribution of larger amounts of manure are needed. Enriching the manure and investing in fossil fuel substitution will improve the environmental profile of the crops produced under intensive systems in the Southwest state of Sao Paulo, Brazil.
Publisher: Springer Science and Business Media LLC
Date: 20-12-2015
Publisher: Springer Science and Business Media LLC
Date: 02-02-2010
Publisher: Springer Science and Business Media LLC
Date: 04-08-2011
Publisher: Elsevier BV
Date: 05-2012
DOI: 10.1016/J.VETPAR.2011.11.058
Abstract: This work investigated the preventive effect of Artemisia annua L. dried leaves supplied as a botanical coccidiostat to two broiler genotypes reared in a Danish free-range system in a factorial experiment (two genotypes and ± supplement of dried A. annua leaves). The genotypes White Bresse L40, a pure slow-growing line, and Kosmos 8 Ross, a hybrid genotype with medium growing characteristics, were used. Broilers were raised indoor until 29-days-old and kept free of parasites. Twelve groups of 30 randomly selected broilers were placed in the range forming three replicates for each treatment combination. The paddocks were cultivated with a mix of grass and clover. A separate group of broilers was naturally infected with Eimeria spp. oocysts and five animals nominated as "seeders" were introduced to the above mentioned 12 groups, 10 days after its formation, with each group consisting of 35 animals per plot. This infection strategy was meant to imitate the transmission pathway observed at farm level. Ten in idual birds from each of the 12 groups, in total 120 animals of mixed sex, were monitored twice weekly for 30 days for oocysts excretion. PCR of pooled faecal s les, oocyst morphology and localization upon necropsy were used to identify the Eimeria species involved in the infection. In general, broilers from both genotypes in the range coped well with a coccidia infection caused by Eimeria acervulina and Eimeria maxima as no clinical symptoms, or deaths, were reported during the experiment. In general, broilers supplemented with A. annua dried leaves showed a significantly (p<0.05) reduced number of excreted oocysts during the infection with no interaction to genotype. Females generally had a significantly higher shedding of oocysts than males (p<0.05). The overall body weight gain and the daily weight gain when infection was subdued showed a three-way interaction among genotype, sex and treatment - accounted mainly for the fact that Kosmos females responded positively to the Artemisia treatment while Kosmos males responded negatively, and only minor differences were found between sexes for the White Bresse genotype. In conclusion, supply of A. annua dried leaves as a botanical coccidiostat significantly reduced oocyst output in free ranged broilers and thus may form part of a strategy to prevent commercial losses.
Publisher: FapUNIFESP (SciELO)
Date: 2022
DOI: 10.1590/1806-9479.2021.230363
Abstract: Resumo: O trabalho aborda efeitos do Programa de Aquisição de Alimentos e do Programa Nacional de Alimentação Escolar sobre aspectos da organização social e da comercialização no contexto de quatro cooperativas e de uma associação de produtores de bananas nos municípios de Miracatu, Sete Barras e de Registro, em São Paulo. Para tanto, os principais gestores e 38 produtores foram entrevistados. As entrevistas ocorreram entre agosto de 2017 e maio de 2018. A criação das cooperativas derivou do processo de organização dos produtores para acessar tais programas. Para a venda direta e permanente de alimentos, as organizações precisaram adquirir aprendizados e organizar os produtores para atender exigências de padronização das frutas e de frequência de abastecimento. Para a comercialização foram realizados investimentos em governança, estruturas físicas e processos de logística. O aluguel de um entreposto em Santo André - SP foi um avanço no controle do processo de comercialização. A expansão das vendas institucionais promoveu o fortalecimento dos laços organizativos regionais, culminando na criação de uma cooperativa de segundo grau. Assim, a produção agregada dos agricultores passou a chegar aos mercados via cooperativas, permitindo que maior proporção do valor gerado na produção ficasse nas mãos do trabalhador familiar.
Publisher: Springer Science and Business Media LLC
Date: 07-08-2022
Publisher: Springer Science and Business Media LLC
Date: 09-2011
Location: Brazil
No related grants have been discovered for Gustavo Fonseca de Almeida.