Carcass traits and meat quality of lambs fedwith cactus (Opuntia ficus indica Mill) silage and subjected to an intermittent water supply.

The present study aimed to evaluate the effect of cactus silage and an intermittent water supply for lambs on carcass traits and meat quality. Thirty-six crossbreed lambs with an initial average weight of 19.8 ± 2.1 kg and average age of 6 months were randomly assigned to a 3 × 3 factorial design comprising three addition ratios of cactus silage to the diet (0, 21, and 42% based on dry matter) and three water supply intervals (0, 24, and 48 h) with four replicates. There was no interaction (P > 0.05) between the cactus silage ratio and intermittent water supply for any of the evaluated variables, with the exception of the yield of the half carcass commercial cuts. There was no significant effect of intermittent water supply (P > 0.05) on the carcass characteristics or meat quality. The addition of forage cactus silage as a substitute for Tifton hay affected the morphometric measurements (P 0.05). The addition of forage cactus silage to the lambs? diet affected (P < 0.05) the composition of some saturated fatty acids in the meat. A water supply interval of up to 48 h does not influence carcass characteristics and meat quality. Therefore, the use of cactus silage can be recommended in situations of water scarcity without harming the production or meat quality of crossbreed lambs

Avaliação de cultivares de mandioca em ambientes de Tabuleiros e Agreste inseridos nos Estados da Bahia e Sergipe: safra 2010/2011.

O objetivo deste trabalho foi averiguar o desempenho de vinte e nove cultivares de mandioca, quanto às variáveis altura da planta, rendimentos da parte aérea, de raízes tuberosas e de amido e teores de matéria seca e de amido nos municípios de Cruz das Almas/BA e Umbaúba/SE, inseridos em áreas de Tabuleiros Costeiros desses estados e, São Domingos/SE, localizado no Agreste sergipano, para fins de recomendação. Foram plantados dois ensaios na safra 2010-2011, utilizando-se o delineamento experimental em blocos ao acaso com três repetições dos 29 tratamentos. Esses ensaios foram colhidos aos 12 e 15 meses após o plantio. Detectaram-se, nas análises de variância conjuntas, diferenças entre as cultivares e os ambientes e inconsistência no comportamento das cultivares perante as condições ambientais, para todas variáveis estudadas. As cultivares de mandioca BRS Caipira, Irará, Clone 9783/13, BRS Tapioqueira, Preta do Sul, Poti Branca, Mucuri, Sergipe e Lagoão apresentaram bom desempenho agronômico, justificando suas recomendações para exploração comercial visando a produção de amido em áreas dos Tabuleiros Costeiros e Agreste dos Estados da Bahia e Sergipe, por associarem produtividades elevadas de raízes tuberosas a elevados rendimentos de amido, permitindo a maximização do produto final por unidade de área cultivadabitstream/item/118386/1/Avaliacao-de-cultivares-de-mandioca-BP-85.pd

Desempenho de cultivares de mandioca no Nordeste brasileiro na safra 2009/2010.

O objetivo deste trabalho foi averiguar o comportamento de cultivares de mandioca em diferentes épocas de colheita e ambientes de produção visando atender as necessidades dos produtores de mandioca do Nordeste brasileiro., Os ensaios foram realizados no ano agrícola de 2009/2010, nos estados da Bahia, Sergipe, Pernambuco e Rio Grande do Norte. O delineamento experimental adotado nos experimentos foi o de blocos ao acaso, com três repetições, nos quais 16 cultivares de mandioca foram avaliadas. Os resultados permitem inferir que as cultivares BRS Caipira, BRS Tapioqueira, BRS Poti Branca, Irará, Kiriris e o Clone 9783/13 consubstanciam-se em alternativas promissoras para a mandiocultura regional, por apresentarem altas produtividades tanto de raízes tuberosas, quanto de amido e biomassa da parte aérea.bitstream/item/118385/1/Desempenho-de-Cultivares-BP-84.pd

Didactic Sequence for Teaching Exponential Function

This paper presents a methodological proposal for the teaching of exponential function, resulting from the application of a didactic sequence involving exponential function, where evidence of learning and the consolidation and application of mathematical concepts in problem solving were identified and analyzed. The Didactic Engineering of Michèle Artigue (1988) was used as a research methodology. As theoretical contributions that guided and enabled the development of the research, we chose the use of Mathematical Investigation in the classroom; Didactic Sequence in the conception of Zabala (1999); the Articulated Units of Conceptual Reconstruction proposed by Cabral (2017) and assumptions of Vygotsky\u27s theory. A didactic sequence composed of five UARC\u27s was elaborated to work the exponential function, with a view to minimizing the difficulties naturally imposed by the content to be explained. Microgenetic analysis of verbal interactions between teacher and students was used to analyze the results of the application. The results show that the students participating in the experiment showed evidence of learning, recorded during the process, and began to have a good understanding of the concepts and properties related to the topic, in addition to a good performance in carrying out the activities, facts that corroborate the potential of the didactic sequence proposed herein

Effect of inoculation with preactivated Lactobacillus Buchneri and urea on fermentative profile, aerobic stability and nutritive value in corn silage.

The current study aimed to evaluate the application effects of the preactivated Lactobacillus buchneri and urea on the fermentative characteristics, chemical composition and aerobic stability in corn silages. The design was completely randomized, in a 6 × 5 factorial arrangement, with six types of additiveand five opening times. The treatments consisted of corn silage; corn silage with freeze-dried inoculant; corn silage with freeze-dried inoculant +1.0% urea; corn silage with activated inoculant; corn silage with activated inoculant +1.0% urea, and corn silage with 1.0% urea. Populations of lactic acid bacteria stabilized at the 70th day, with average values of 8.91 and 9.15 log cfu/g for corn silage with freeze-dried inoculant +1.0% urea and corn silage with freeze-dried inoculant, respectively. In contrast, the silages without additives showed significantly lower values of 7.52 log cfu/g forage at the 70th day. The silages with urea (isolated or associated with the inoculant) increased the total nitrogen content. The maximum temperature values were highest in the corn silages without additives, indicating that these silages were more prone to deterioration. The use of Lactobacillus buchneri activated proved to be more efficient in improving the fermentative profile of corn silages than the freeze-dried inoculant. The use of urea as an additive reduced the losses and improved the nutritional value and aerobic stability of corn silages. Additionally, the combination of Lactobacillus buchneri activated and urea may be used as a technique to improve the fermentative profile, chemical composition and aerobic stability of corn silages

Isolation and identification of lactic acid bacteria in fresh plants and in silage from Opuntia and their effects on the fermentation and aerobic stability of silage.

The current study aimed to select the strains of lactic acid bacteria (LAB) isolated from forage cactus plants and silage and assess their effects on silage fermentation and aerobic stability. Forty wild isolates from plant and cactus silage, classified as LAB, were evaluated for metabolite production and identified by 16S ribosomal DNA sequencing. These wild isolates were identified as Lactobacillus plantarum, Weissella cibaria, Weissella confusa and Weissella paramesenteroides and the LAB populations differed among the silage. The use of microbial inoculants did not influence gas or effluent losses in forage cactus silage. The silage inoculated with the microbial strain GP15 showed the highest number of LAB populations. The amounts of water-soluble carbohydrates (WSC) and ammonia nitrogen differed among the silage. The silage inoculated with the GP1 strain presented the highest WSC. Populations of enterobacteria and yeasts and moulds were below the minimum detection limit (<2.0 log cfu/g silage) in all the silage studied. The predominant action of inoculants was to maximize dry matter recovery of the silage, which could be the criterion adopted to select the strains of LAB for use as inoculants in Opuntia silage

PCR identification of lactic acid bacteria populations in corn silage inoculated with lyophilised or activated Lactobacillus buchneri.

This study aimed to evaluate the effect of inoculation with lyophilised and/or activated Lactobacillus buchneri on lactic acid bacteria populations in corn silage. Experimental treatments consisted of corn silage without additives or silage with the inoculants of L. buchneri (1 x 105 cfu/g) applied according to the manufacturer’s recommendations (1 g/tonne fodder) in the forms of the lyophilised inoculant and pre-activated inoculant. Purified isolates from corn silage with and without the inoculant were identified, and 93% of the isolates corresponded to the lactic acid bacteria of the species Lactobacillus plantarum. Among the isolates, no bacteria of the species L. buchneri were detected. The application of lyophilised or activated L. buchneri improved the microbiological profile and reduced ethanol production in corn silage, even without being identified among the isolates captured 70 days after ensilage.On line