No abstract

No abstract

No abstract

No abstract

The aim was to evaluate how the fodder pre-dehydration time and its phenological stages influence on ruminal degradability and digestibility of ryegrass silage. The evaluated samples consisted of treatments: Vegetative: Cut and ensiled; cut + 4 hours pre-drying and ensiled and; cut + 7 hours pre-drying and ensiled; Pre-flowering: Silage cutting and ensiled and 4 hours pre-drying and ensiled; Flowering: cut and ensiled, no pre-drying, with four replications each treatment. Silage was storage for four months. It was carried out three in situ digestibility assays to determine the curve of ruminal degradability at different times (3, 6, 9, 12, 24, 48 and 72 hours), like in situ digestibility and other three assays of 24 hours and 48 hours to determinate in vitro digestibility of silage. The digestibility of ryegrass silage was influenced by both the pre-dehydration times and phenological stage, and the dehydration time of cut and silage had a high proportion of degradable components, with higher degradation rate by 24 hours of incubation. The in vitro digestibility of the ryegrass silage was greater than that in situ for up to 48 hours. The digestibility of the ensiled ryegrass biomass was influenced by the dehydration times, as well as the plant growth stage, regardless of the methodology used, being higher values for the treatment without previous drying of the vegetative stage.

Penelitian ini bertujuan untuk menentukan dosis pupuk cair yang optimal terhadap produksi rumput gajah taiwan (Pennisetum purpureum Schumach). Penelitian ini dilaksanakan di Kebun Percobaan Program Studi Peternakan Fakultas Pertanian Universitas Sriwijaya Indralaya Ogan Ilir, Sumatera Selatan. Penelitian dilaksanakan selama 4 bulan, dimulai dari bulan Juli sampai dengan Oktober 2011. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) dengan 4 perlakuan dan setiap perlakuan terdiri dari 3 kelompok sebagai ulangan. Perlakuan yang digunakan adalah pemberian pupuk cair, dengan dosis yaitu C0 (0 Liter pupuk cair ha-1), C1 (1 Liter pupuk cair ha-1), C2 (2 Liter pupuk cair ha-1), dan C3 (3 Liter pupuk cair ha-1). Parameter yang diamati adalah produksi segar dan produksi berat kering rumput gajah taiwan. Hasil penelitian menunjukkan bahwa pemberian pupuk cair berpengaruh sangat nyata (P<0,01) terhadap produksi segar dan produksi berat kering rumput gajah taiwan. Produksi berat segar rumput gajah taiwan tertinggi sebesar 648,93 gram dan produksi berat kering nya sebesar 208,8 gram. Kesimpulan dari penelitian ini adalah pemberian pupuk cair 2 Liter ha-1 dapat meningkatkan produksi segar dan produksi berat kering yang optimal pada rumput gajah taiwan. Kata kunci: Pemberian, pupuk cair, produksi, rumput gajah taiwan

Fatores que afetam a comercialização de bezerros em leilões na região Sul do Estado do RioGrande do Sul, Brasil [Factors affecting the commercialization of calves in auctions in the southern region of the Rio Grande do Sul State, Brazil] "Artigo Científico/Scientific Article" Resumo A rentabilidade dos sistemas de cria bovina é dependente de um conjunto de fatores que atuam em sinergismo. No entanto, ao analisarmos esses elementos isoladamente, o preço de comercialização adquire maior impacto sobre as receitas da atividade. Neste contexto, objetivou-se verificar a influência de características fenotípicas e do período de comercialização (outono e primavera), no preço de bezerros comercializados na região Sul do Rio Grande do Sul. Foram coletados dados de 50 lotes de bezerros, perfazendo um total de 586 animais, previamente e durante o processo de comercialização em leilões realizados no ano de 2017. A uniformidade de estrutura corporal do lote não influenciou o número de lances, a liquidez e o preço final obtido por quilograma dos bezerros (p>0,05). A uniformidade de padrão racial influenciou o número de lances recebidos pelos lotes de bezerros machos (p<0,05). Fêmeas foram mais valorizadas no período do outono (p<0,05). Fêmeas Brangus foram mais valorizadas em relação às Braford e Devon (p<0,05). Fêmeas leves (≤150 kg) receberam maior preço comparadas às mais pesadas (>180kg). Machos de pesos intermediários (150 a 180 kg) foram mais valorizados que os pesados (>180 kg). O preço praticado pelos machos foi 8,61% superior ao das fêmeas.Conclui-se que lotes de animais mais uniformes quanto às características raciais recebem maior valorização durante a comercialização. As faixas de peso interferem no preço de venda, sendo os animais mais pesados os menos valorizados. O período de comercialização e a raça dos animais interferem no preço por unidade de peso das fêmeas.Palavras-chave: bovinos de corte; sistema de cria; venda; características fenotípicas. AbstractProfitability of cow-calf systems is dependent on a set of factors that act in synergism. However, when we analyze these elements in isolation, the commercialization price acquires greater impact on the activity revenue. In this context, the aim of this study was to verify the effect of phenotypic characteristics and commercialization period (autumn and spring) on the price of commercialized calves in the southern region of the state of Rio Grande do Sul. Data were collected from 50 calf lots, totaling 586 animals, previously and during the commercialization process in auctions performed in the year 2017. Body structure uniformity within a lot did not influence the number of bids, the liquidity and the final price obtained per kilogram of the calves (p>0.05). Females had a higher price in the autumn period (p<0.05). Brangus females had a higher price than Braford and Devon females (p<0.05). Lightweight females (≤150 kg) had a higher price than the heavier females (>180 kg). Intermediate weight males (150 to 180 kg) had a higher price than heavy males (>180). The...

The dairy industry requires good quality milk with an adequate yield that does not affect the industrial process. Therefore, to produce safe food for consumers aiming to increase the shelf life of the product, the before mentioned industry makes use of heat treatment (pasteurization or UHT – Ultra-high Temperature processing). Milk must have adequate quality and high-temperature resistance; otherwise, thermal stability problems may occur. The alcohol or alizarin test is used in dairy farms to identify milk samples that present over the normal acidity and to measure their stability before being transported to the consumer market. Thus, the objective of this review was to search, in the literature, for evidence regarding the factors that interfere in the heat stability of milk and the use of the alcohol test. False-positive results are usual in samples that make use of that test, showing cases of unstable non-acid milk and putting in jeopardy the reliability of the results.