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Search Results: 1 - 10 of 235070 matches for " José Maurício de Souza;Valadares Filho "
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Desempenho produtivo de fêmeas leiteiras alimentadas com silagem de milho e concentrado à base de farelo de soja ou farelo de algod?o
Santos, Stefanie Alvarenga;Campos, José Maurício de Souza;Valadares Filho, Sebasti?o de Campos;Detmann, Edenio;Oliveira, André Soares de;Souza, Shirley Motta de;
Revista Brasileira de Zootecnia , 2010, DOI: 10.1590/S1516-35982010000300025
Abstract: diets for dairy heifers were assessed with corn silage and soybean or cotton seed based concentrate. four experimental diets consisting of the combination of two concentrate levels, 1 or 2 kg, and two protein sources, soybean meal or cotton seed meal. the effect of the interaction was observed for intake of dry matter (dm), neutral detergent fiber (ndf) in % live weight and total digestible nutrient intake (tdn). the quantity of concentrate influenced the intakes of crude protein (cp), ndf, ether extract (ee), non-fibrous carbohydrates (nfc), organic matter (om) and cp per kg tdn. there was no significant effect of the treatments for dm, ndf, om and ndt digestibility but the protein source influenced the cp, ee and nfc digestibility. there was an effect of concentrate quantity for weight gain (wg), and there was effect of the concentrate quantity × protein source interaction for weight gain per cm of height gain of the cernelha. the diet consisting of 1 kg cotton seed based concentrate was insufficient to reach 800 g/day weight gain and diets consisting of 2 kg concentrate resulted in greater weight gain. however, the diet consisting of 2 kg soybean meal based concentrate was more efficient because it gave greater linear growth to the heifers with an 820g mean gain per day. body weight prediction equations based on the thorax perimeter are more accurate in prediction compared to the other linear measurements.
Balan?o de nitrogênio em fêmeas leiteiras em confinamento alimentadas com concentrado à base de farelo de soja ou farelo de algod?o
Santos, Stefanie Alvarenga;Campos, José Maurício de Souza;Valadares Filho, Sebasti?o de Campos;Oliveira, André Soares de;Souza, Shirley Motta de;Santiago, Alberto Magno Ferreira;
Revista Brasileira de Zootecnia , 2010, DOI: 10.1590/S1516-35982010000500026
Abstract: the objective of this work was to evaluate effect of based-soybean or cottonseed meal concentrate rations in diets with corn silage on nitrogen balance (nb) and microbial protein production in growing dairy females. diets consisted of the combination of two levels of concentrate ration, 1 or 2 kg, and two protein sources, soybean meal or cottonseed meal. the animals that consumed 2 kg of concentrate ration showed greater total nitrogen intake, however, there was no significant effect on fecal-n, urine-n and nitrogen balance. the interaction among the concentrade levels and the protein source affected the urine uric n (n-urine) but did not change the levels of ureic nitrogen in the plasma. levels of concentrate and protein sources did not affect concentrations of total purine and allantoin in the urine, the percentage of allantoin regarded to total purine, the levels of uric acid in the urine, microbial nitrogen neither the microbial efficiency. the supply of 1 or 2 kg of concentrate ration for growing dairy heifers, using soybean meal or cottonseed meal as protein sources does not affect microbial efficiency, although the supply of 2 kg of concentrate ration causes n waste in feces.
Produ??o de leite, consumo e digestibilidade aparente dos nutrientes, pH e concentra??o de am?nia ruminal em vacas lactantes recebendo ra??es contendo silagem de milho e fenos de alfafa e de capim-coastcross
Moreira, Andréia Luciane;Pereira, Odilon Gomes;Garcia, Rasmo;Valadares Filho, Sebasti?o de Campos;Campos, José Maurício de Souza;Souza, Viviane Glaucia de;Zervoudakis, Joanis Tilemahos;
Revista Brasileira de Zootecnia , 2001, DOI: 10.1590/S1516-35982001000400025
Abstract: ten lactating cows (holtein and h*z crossbreed) after 55d calving, with average weigth of 540 kg alloted to a switch-back design, were used in order to evaluate the intake and apparent digestibilities of dry matter (dm), organic matter (om), neutral detergent fiber (ndf), crude protein (cp), total carbohydrates (tc) and ether extract (ee), the ph and ruminal ammonia concentration and milk yield and composition. the animals were fed ad libitum with diets containing alfalfa hay (ah), coastcross bermudagrass hay (cch), corn silage (cs), ? ah + ? cs and and ? cch + ? cs in 60% of the total diet (dry matter basis). the nutrients intake were not affected by the diets. the dry matter, crude protein and neutral detergent fiber apparent digestibilities were higher for diets with corn silage. the experimental diets did not affect ph and the ruminal ammonia concentration, however quadratic effect was observed for collection time. the highest milk productions were observed for the animals that received cs and ? ah + ? cs diets. the diets did not affect the crude protein and fat milk contents.
Cana-de-a?úcar em substitui??o à silagem de milho em dietas para vacas em lacta??o: desempenho e viabilidade econ?mica
Magalh?es, André Luiz Rodrigues;Campos, José Maurício de Souza;Valadares Filho, Sebasti?o de Campos;Torres, Robledo de Almeida;Mendes Neto, Josué;Assis, Anderson Jorge de;
Revista Brasileira de Zootecnia , 2004, DOI: 10.1590/S1516-35982004000500022
Abstract: the experiment was carried out to evaluate the effects of the replacement of corn silage by up to 100% sugar cane in diets for milking cows. studied characteristics were milk production and composition, body weight variation, intake of nutrients and economical viability of the diets. twelve pure and crossbred holstein milking cows, with potential yield of 5,000 to 7,000 kg of milk per lactation, were distributed in three 4x4 balanced latin square. the animals were maintained in individual stalls, where they were fed ad libitum diets with forage:concentrate ratio of 60:40 twice a day during the 84 experimental days. treatments consisted in four levels of corn silage substitution by sugar cane: 0; 33.3; 66.6 and 100%. milk productions were 24.17; 23.28; 22.10 and 20.36 kg/day and corrected 3.5% fat milk productions were 27.00; 24.98; 24.36 and 21.41 kg/day to the levels 0; 33.33; 66.66 and 100% of sugar cane in roughage, respectively. there was not difference in milk composition. diets intakes, based on dry matter, were 177.90; 169.42; 165.69 and 156.80g/kg0.75 when levels of sugar cane increased in the diets, so, there was a linear reduction. the feeding costs reduced, on r$/day: 4.79; 4.33; 4.00 and 3.58, as well as the incomes, on r$/day: 8.32; 7.60; 6.55 and 5.63, and profits, on r$/day: 3.53; 3.27; 2.55 and 2.05 to the levels 0; 33.3; 66.6 and 100% of sugar cane, respectively. in spite of this, the level of 33.3% of sugar cane in corn silage replacement was technical and economically viable while the levels 66.6 and 100% of substitution were not viable.
Estimate of the optimal level of concentrates for dairy cows on tropical pastures by using the concept of marginal analysis
Oliveira, André Soares de;Campos, José Maurício de Souza;Lana, Rogério de Paula;Detmann, Edenio;Valadares Filho, Sebasti?o de Campos;
Revista Brasileira de Zootecnia , 2010, DOI: 10.1590/S1516-35982010000900024
Abstract: it was adopted in this work a methodology to estimate the optimal level of concentrate food for dairy cows on tropical pastures based on the theory of marginal analysis. an empiric model was developed and validated for application of the methodology using a database composed of 62 means of treatments from 32 studies in which milk production was evaluated regarded to the levels of concentrate feeding. milk production (mp) showed quadratic behavior in response to concentrate intake (ci): mp (kg/cow/day) = 10.554 + 1.5855ci - 0.0552ci2. evaluation of the mp values observed over the predicted ones pointed the non-rejection of the null hypothesis, indicating that the model can be applied on the prediction of milk production, and consequently, on the optimal level of supplementation. however, evaluation of the partition of mean square error of prediction indicated the need for adjustments. the marginal production response (mpr) presented decreasing linear effect at ci level: mpr (kg milk/kg concentrate added) = 1.5855 - 0.1104ci. the intake of concentrate that maximizes profit per animal (cioptimum) is estimated by the following equation: cioptimum (kg/cow/day, as fed basis) = (1.5855 - (px/py))/0.1104; in which px and py are, respectively, the prices of concentrate feeds ($/kg, as fed basis) and of the milk at farmgate ($/kg). it is suggested the realization of new studies to include in the model, indicators of reproductive performance and other factors that affect the productive response to supplementation with concentrate feeds. recommendations on levels of concentrate feeding for bovines should be based on presuppotions of marginal response theory, in order to avoid irrational use of nutrients.
Comportamento ingestivo de novilhas leiteiras alimentadas com polpa cítrica em substitui??o ao feno de capim-tifton 85
Mendes Neto, Josué;Campos, José Maurício de Souza;Valadares Filho, Sebasti?o de Campos;Lana, Rogério de Paula;Queiroz, Augusto César de;Euclydes, Ricardo Frederico;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000300015
Abstract: the objective of this trial was to evaluate the chewing activity of dairy heifers fed diets in which tifton 85 hay (cynodon dactylon (l.) pear) was partially replaced by citrus pulp. twenty-eight holstein dairy heifers averaging 12 months of age and 184 kg of bw at the beginning of the trial were blocked by initial bw and, within each block (7 blocks), randomly assigned to one of the following four treatments: 0, 16.6, 33.3, or 50% of a concentrate based on citrus pulp that partially replaced tifton 85 hay in the diet. diets were formulated to be isonitrogenous. it was observed linear reductions at the time spent eating, ruminating, and total chewing time (min/day) when citrus pulp was increased in the diet. however, the number of chews during ruminating was not affected by partially replacing tifton 85 hay with citrus pulp. although eating and ruminating efficiencies increased linearly when expressed in g of dm/h, both variables did not differ when expressed in g ndf/h across treatments. replacing tifton 85 hay with citrus pulp decreased eating, ruminating, and total chewing times leading to significant changes in the overall chewing activity of dairy heifers.
Comportamento ingestivo, consumo e digestibilidade de nutrientes, produ??o e composi??o do leite de vacas alimentadas com silagem de milho ou cana-de-a?úcar com caro?o de algod?o
Sousa, Daniel de Paula;Campos, José Maurício de Souza;Valadares Filho, Sebasti?o de Campos;Lana, Rogério de Paula;Sediyama, Camilla Atsumi Zanuncio;Mendes Neto, Josué;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009001000028
Abstract: twelve cows were allotted to three 4 × 4 latin squares to evaluate intake and apparent digestibility of nutrients, milk composition and production and feeding behavior. the treatments consisted of maize silage or sugarcane with 0, 7 or 14% of whole cottonseed. in the established forage:concentrate ratio of 60:40, the corn silage treatment was superior for most of parameters evaluated including dry matter intake (20.8 kg/d), milk and fat corrected milk production (25.0 and 27.0 kg/d) and daily production of fat and protein (984 and 772 g/d). sugarcane with 7% of whole cottonseed treatment increased dm intake (17.1 vs. 15.5 kg/d) and sugarcane treatments with both 7% and 14% increased the intakes of ether extract (0.41 and 0.59 vs 0.24 kg/dia), non fibrous carbohydrate (7.4 and 7.3 vs 6.7 kg/d) and ndt (11.6 and 11.9 vs 10.4 kg/d) compared to sugarcane without whole cottonseed treatment. the higher intake of nutrients resulted in increases in milk production (19.7 and 20.6 vs 18.6 kg/d), fat corrected milk production (21.1 and 21.6 vs 18.9 kg/d) and daily fat (771 and 781 vs 664 g/d) and protein production (602 and 625 vs 565 g/d) by the two levels compared to sugarcane without whole cottonseed treatment, respectively. sugarcane with 14% whole cottonseed treatment presented negative weight variation (-0.22 kg/d), larger period in rumination activity than sugarcane without whole cottonseed, tendency of lower dry matter and nutrient intake than sugarcane with 7% whole cottonseed. by the data presented, the use and recommendation of larger whole cottonseed content diets should be analyzed with care.
Consumo, digestibilidade, desempenho, desenvolvimento ponderal e economicidade de dietas com polpa cítrica em substitui??o ao feno de capim-tifton 85 para novilhas leiteiras
Mendes Neto, Josué;Campos, José Maurício de Souza;Valadares Filho, Sebasti?o de Campos;Lana, Rogério de Paula;Queiroz, Augusto César de;Euclydes, Ricardo Frederico;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000300016
Abstract: the objective of this trial was to evaluate intake, digestibility, performance, development, feed efficiency and feeding costs in dairy heifers fed increasing levels of citrus pulp that partially replaced tifton-85 hay (cynodon dactylon (l.) pear) in the diet. twenty-eight holstein dairy heifers averaging 12 months of age and 184 kg of bw at the beginning of the trial were blocked by initial bw and, within each block (7 blocks), randomly assigned to one of the following four treatments: 0, 16.6, 33.3, or 50% of a concentrate based on citrus pulp that partially replaced tifton 85 hay in the diet. intakes of dm, om, cp,tcho, tdn, ca, and p all increased linearly while that of ndf was the opposite by partially replacing tifton 85 hay with citrus pulp. a significant quadratic effect was observed for ether extract intake (ee) with quadratic minimum at 2.27% of hay replaced by citrus pulp. apparent total tract digestibilities of dm, om, cp, and ndf decreased linearly whereas that of ee and tcho was not affected by replacing hay with citrus pulp in the diet. although the average daily weight gain and heart girth increased linearly, the opposite was observed for wither height while hip height was not affected by replacing hay with citrus pulp. it was observed a linear increase in gross revenue and gross margin and a linear reduction in the cost per kg of weight gain on dairy heifers fed increasing levels of dietary citrus pulp. it can be concluded that up to 35% of citrus pulp can be included in the total diet dm of dairy heifers with significant reduction in the feeding costs.
Desempenho produtivo de vacas leiteiras alimentadas com diferentes propor??es de cana-de-a?úcar e concentrado ou silagem de milho na dieta
Costa, Marcone Geraldo;Campos, José Maurício de Souza;Valadares Filho, Sebasti?o de Campos;Valadares, Rilene Ferreira Diniz;Mendon?a, Sandro de Souza;Souza, Daniel de Paula;Teixeira, Michella da Paschoa;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000700032
Abstract: twelve lactating holstein dairy cows were assigned to three 4x4 latin squares to evaluate the effects of feeding corn silage or different dietary ratios of sugarcane and concentrate on nutrient intake, apparent digestibility, milk composition and yield, and body weight change. the diets contained 60% corn silage or 60, 50, and 40% of sugarcane supplemented with 1% of urea + ammonium sulphate (9:1). no significant differences were observed between the diet with 60% of corn silage and that with 40% of sugarcane on milk yield (20.81 and 19.78 kg/day), intake of dry matter and almost all remaining nutrients, apparent digestibility of most nutrients, and body weight change. among sugarcane-based diets, cows fed the diet containing 60% sugarcane had the lowest milk yield (16.90 kg/day), dry matter intake, and body weight change, those fed 50% sugarcane were intermediate, and cows fed the diet with the smallest proportion of sugarcane (40%) had the highest values for these variables. intake of ndf of cows receiving 50% sugarcane was similar to that of cows fed 40% sugarcane while for apparent digestibilities of ndf and nonfiber carbohydrates similar values were observed for cows fed 60 and 50% sugarcane-based diets. milk composition did not differ significantly across treatments in the present trial.
Consumo, digestibilidade e desempenho de novilhas alimentadas com casca de café em substitui??o à silagem de milho
Teixeira, Rafael Monteiro Araújo;Campos, José Maurício de Souza;Valadares Filho, Sebasti?o de Campos;Oliveira, André Soares de;Assis, Anderson Jorge;Pina, Douglas dos Santos;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000400029
Abstract: the objective was to evaluate the replacement corn silage by coffee hulls in the diet on performance, total apparent digestibility of dairy heifers. twenty-four dairy holstein heifers, purebred and crossbred, were assigned, according to animal initial weight, to a randomized block design with four treatments (coffee hulls levels: 0.0, 7.0, 14.0, and 21.0% dm basis) and six replicates. all heifers were daily fed 2.0 kg concentrate. dm intake linearly increased, while fresh matter (fm) intake was not affected by the inclusion of coffee hulls in the diets. the increment of dm intake was approximately 20 g per unit of coffee hulls added to the diet (% dm) and the average intake of fm was 13.84 kg/d. digestibilities of dm, om, cp, cho, ndf and the concentration of ndt in the diet linearly decreased with the replacement of corn silage by coffee hulls, observing a reduction of 0.158 percent units in the digestibility of the dm per unit of coffee hulls added to the diet (% dm). the inclusion of coffee hulls negatively affected the weight gain that linearly decrease (5.51g bw) per unit of coffee hulls added to the diet), as the coffee hulls levels increased, in replacement of corn silage. coffee hulls could replace corn silage up to 14% level, dm basis, in diets for dairy heifers.
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