Julio Cesar Damasceno
Universidade Estadual de Maringá
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Featured researches published by Julio Cesar Damasceno.
Revista Brasileira De Zootecnia | 2003
Geane Dias Gonçalves; Geraldo Tadeu dos Santos; Clóves Cabreira Jobim; Julio Cesar Damasceno; Ulysses Cecato; Antonio Ferriani Branco
The objectives of this experiment were to determine dry matter intake (DMI), apparent digestibility of dry matter (ADMD), organic matter (ADOM), neutral detergent fiber (ADNDF), in vitro DM digestibility (IVDMD) and protein and carbohydrate fractions of Bermuda grass hay harvested at 21, 42, 63 and 84 days. The experimental design used to estimate the feed intake and the apparent digestibility was a 4 x 4 Latin square and to evaluate age effect was used regression analysis. Dry matter intake (DMI) and apparent digestibility of DM, OM, CP and NDF showed a negative linear response for harvest age. Results for in vitro DM digestibility (IVDMD) were similar to apparent digestibility. Protein and the carbohydrate C fractions increased with harvest age and average values ranged from 17.4 to 22.8 and 10.9 to 14.3%, respectively. B3 protein fraction increased with harvest age and B2 fraction showed little variation with harvest age. A and B1 carbohydrate fractions decreased with harvest age. Results for DMI were 2.4, 2.2, 2.1 and 1.1% and for IVDMD were 60.5, 58.8, 56.3 and 53.8% for the 28, 42, 63 and 84 days of harvest age, respectively.
Animal Science | 2006
C. Cortes; Julio Cesar Damasceno; J. Jamot; S. Prache
In stall-feeding conditions, food diversity has been shown to increase an animals motivation to eat and its level of food intake. This effect has also been suggested, but not demonstrated, for free-grazing animals. In free-grazing conditions, however, animals may have to search for the preferred plant species and this may reduce their intake rate. Moreover, the management of diverse swards faces a risk of overgrazing the preferred species and undergrazing the less preferred species, leading to resource degradation. We investigated the effect of food diversity on foraging behaviour and intake in grazing sheep, in interaction with the type of diversity (conterminal monocultures v . mixtures) and management (two monocultures offered simultaneously v . successively over time). Five treatments were compared with five groups of five dry INRA 401 ewes for five periods, using a Latin-square design: LOL=grazing a monoculture of Lolium perenne cv. Herbie (L); FES=grazing a monoculture of Festuca arundinacea cv. Florine (F); STRIPS=grazing conterminal monocultures of L and F, 0·5:0·5 by ground area, with animals having a free choice between both species; TIME=grazing L from 16:00 to 09:00 h and F from 09:00 to 16:00 h; MIX=grazing an intermeshed mixture of L and F. Sward height was maintained at 9 cm. Each period comprised a 5-day adaptation subperiod followed by a 5-day measurement subperiod. Dietary choices and intake were measured using n -alkanes, and grazing time was assessed using the Ethosys ® recording system. Intake rate was calculated as the ratio of intake to grazing time. Intake in the monoculture treatments were higher than predictions made for housed animals given similar forages ad libitum , demonstrating that sward conditions were favourable for the expression of voluntary intake in all treatments. Intake was higher in LOL than in FES, this result being consistent with predictions for stall-feeding conditions. There was no difference in diet composition, foraging behaviour and intake between the bispecific treatments (STRIPS, TIME and MIX). Intake was higher in the bispecific treatments than in LOL (1666 v . 1492 g digestible organic matter per day, P v . 366 min, P
Brazilian Archives of Biology and Technology | 2004
Marcelo Shizuo Torii; Julio Cesar Damasceno; Luciano da Rocha Ribeiro; Eduardo Shiguero Sakaguti; Geraldo Tadeu dos Santos; Makoto Matsushita; Nelson Massaru Fukumoto
The objective of the present work was to evaluate the physical-chemical characteristics (density, pH, acidity, fat, protein, lactose and total of solids contents) and milk fatty acids composition (C: 4 to C: 20) in response to roughage sources (alfalfa hay T1; oat hay T2 and maize silage T3). Nine Saanen lactating goats were used, in a triple Youden square design (3 animals x 2 periods). There was no treatment effects in the physical-chemical variables in the univariate analyses; by multivariate analyses three distinct patterns of fatty acids could be defined: milk with greater quantity of short chain fatty acids and acids C17:1w7 e C18:2w6 (T1); milk with equivalent amounts of short, medium and long chain fatty acids (T2); and milk with greater amounts of acids C16:1w7, C17:0, C18:1w9 and C20:0 (T3). These results indicated that the roughage sources used in the diet of lactating dairy goats affected the fatty acids composition, without altering the milk physical-chemical characteristics. The acids more sensitive to the treatment effects were: C10:0, C12:0, C14:0, C16:0, C16:1w7, C18:0 and C18:3w6.
Revista Brasileira De Zootecnia | 1999
Lúcia Maria Zeoula; Ivanor Nunes do Prado; Ulysses Cecato; Antonio Ferriani Branco; Julio Cesar Damasceno; Marcio Munemori Watanabe; Daniele Fridrich; Conrado Luís Biliero
The objective of this study was to evaluate the intake, apparent digestibility coefficient (ADC), nitrogen balance, pH and nitrogen ammonia concentration (N-NH3) in the ruminal fluid of sheep. The animals were fed diets composed by concentrates with different ruminal degradability of the fractions starch and protein from the used sources: starch with high (triticale) and low (corn) ruminal degradability combined with nitrogen (N) sources of high (canola meal plus urea) and low (cottonseed meal plus meat and bone meal) ruminal degradability. Sixteen Suffolk sheep, castrated, weighing 37 kg LW were used to estimate the ADC by means of the total collection of feces and urine method. A completely randomized experimental design, with a 2 x 2 factorial arrangement, with four replicates per treatment, was used. In the evaluation of pH and N-NH3, a split plot design was used, being the treatment the whole plot and the time of sampling as the split plot. Higher intakes of dry matter (DM), crude protein (CP) and neutral detergent fiber (NDF) were observed in the animals fed N diets of low ruminal degradability. Higher DM, CP and gross energy ADC were observed for N diets with high ruminal degradability, and for starch, diets with high ruminal degradability of starch and N. The N diets with low ruminal degradability showed the highest values of pH and the lowest concentration of the ruminal ammonia.
Revista Brasileira De Zootecnia | 2010
Anselmo Bodenmüller Filho; Julio Cesar Damasceno; Isolde Terezinha Santos Previdelli; Rosangela Getirana Santana; Carlos Eduardo Crispim de Oliveira Ramos; Geraldo Tadeu dos Santos
The objective of the study was to propose a methodology of production systems analysis, considering intraannual quantitative flow and the qualitative characteristics of the milk delivered by the farmers to the industry. The data were collected from 1,196 milk producers from 2005 to 2006 using month production variables, fat content, protein, lactose and total solids, counting of somatic cells, and standardized counting in plates. The method of analysis used was the main component analyses and ascending hierarchical classification (typology). The most important variables in the construction of the first principal component (PC1) are fat content, protein and total milk solid contents, which explained 32.5% of the diversity of production systems, and they can be considered as the indicator of milk nutritional quality. In the construction of the second principal component (PC2), the most important variables are lactose content, counting of somatic cells and milk microbial counting, which explained 24.04% of the diversity and represent the hygienic quality of the milk. The intra-annual distribution of the milk production is not important to explain the diversity among milk production units. For the production system typology, it was considered the first three main components whose explanation of the total variability was of 70.52%. The 1,196 milk producing rural properties belong to the 17 groups of milk production systems with their own characteristics of milk quality.
Revista Brasileira De Zootecnia | 2010
Nelson Massaru Fukumoto; Julio Cesar Damasceno; F. Deresz; Carlos Eugênio Martins; Antônio Carlos Cóser; Geraldo Tadeu dos Santos
The objective of this study was to evaluate milk yield and composition, dry matter intake, and stocking rate in pastures with tanzania grass (Panicum maximum cv. Tanzânia), star grass (Cynodon nlemfuensis cv. Estrela-Africana), and marandu grass (Brachiaria brizantha cv. Marandu). The grasses were managed in a rotational grazing system with Holstein x Zebu crossbreed cows, with a 30-day resting period and three days of paddock occupation. The pastures were fertilized with 1,000 kg/ha/year using the 20:05:20 (NPK) formula, split in three applications during the rainy season. It was used a complete random block experimental design with three factors being studied and two replications. In the experiment, four cows/paddock were used and, when it was necessary, regulator animals were added in order to obtain a supply of 7% body weight green forage dry matter. The animals were individually fed concentrate at 2 kg/day during the experimental period. Milk yield did not differ among the three grasses, with values of 9.1; 9.1; and 8.7 kg/cow/day for pastures with tanzania grass, star grass and marandu grass, respectively. Similarly, grass did not affect milk chemical composition. Stocking rate was similar among the three grasses, with values of 4.6; 4.5 and 5.0 UA/ha for tanzania grass, star grass and marandu grass, respectively. The highest dry matter intake was observed for tanzania grass with 2.6% of the body weight while stargrass (2.3%) and marandu grass (2.4%) did not differ among each other. The highest dry matter intake on tanzania grass pasture was not reflected on milk yield per animal. Milk yield and composition and stocking rate are similar among the evaluated grasses.
Revista Brasileira De Zootecnia | 2003
Luiz Gonzaga Pego de Macedo; Julio Cesar Damasceno; Elias Nunes Martins; Vicente de Paulo Macedo; Geraldo Tadeu dos Santos; Alencariano José da Silva Falcão; Saul Ferreira Caldas Neto
It was carried out an experiment with goats Saanen, on the first lactation, with 50 kg of body weight, housed in individual stalls of 3 m², to evaluate the effect of substitution of soybean meal (SM) protein by the protein from the corn gluten flour (CGF), in the milk production, milk composition, voluntary intake and plasmatic urea. The experimental design was the triple Latin square 4x4, with four periods of 21 days, being 14 days of adaptation to the diet and seven days for samples collection. The goats were fed and milked in the morning and afternoon. The substitution levels studied were: 0, 10, 30 and 50% of CGF (based in the crude protein). The substitution of the soybean meal by CGM did not affect the intake (kg/day and %BW) of dry matter, crude protein and acid detergent fiber, but there was quadratic effect for neutral detergent fiber intake (kg/day and %BW). There was effect on the levels of plasmatic urea nitrogen (PUN), where the smallest values were in the intermediate levels of substitution, being the biggest values for the treatment with only SM. The milk production decreased lineally with the inclusion of CGM. The substitution levels resulted in lineal decrease in the fat production (kg/day), in the milk fat content (%) and milk total solids content (%). There was quadratic effect for lactose production, being the smallest value for 31.6% of substitution level. It was no effect on in crude protein in the milk, which average was .083 kg/day. The crude protein content, lactose and total solids did not suffer effect of the substitution levels, being the average values of 2.98, 4.35 and 11.51%, respectively.
Revista Brasileira De Zootecnia | 2011
Alexandre Menezes Dias; Luís Carlos Vinhas Ítavo; Julio Cesar Damasceno; Geraldo Tadeu dos Santos; Camila Celeste Brandão Ferreira Ítavo; Fabiano Ferreira da Silva; E. Nogueira; Cláudia Muniz Soares
The objective of this work was to evaluate, in bovines, the intake and apparent digestibility of nutrients, ingestive behaviour and content of total digestible nutrients (TDN) of diets based on sugar cane treated with calcium hydroxide. It was used four cows with average body weight of 412.06 kg ± 37.3 kg. The study included inclusion of calcium hydroxide at the doses 0, 8, 16 and 24 g/kg of sugar cane in natural matter basis fed in diets with 65% of roughage and 35% on concentrate, based on dry matter (DM). It was used a 4 × 4 Latin square experimental design with four treatments and four periods. Calcium hydroxide doses affected nutrient intake: DM intake was 7.88 kg/day at the dose of 14.99 g of calcium hydroxide, organic matter (OM) intake was 6.75 kg/day at 10.94 g; intake of neutral detergent fiber (NDF) of 3.33 kg/day with a dose of 13.93 g; and intake of acid detergent fiber (ADF) of 2.12 kg/day with a dose of 10.51 g. Digestibility coefficients showed a quadratic effect for doses of inclusion of calcium hydroxide. Dry matter digestibility was 72.88% with a dose of 11.65 g of calcium hydroxide, OM digestibility was 75.12% with 12.09 g; NDF digestibility was 58.67% with 12.11 g; ADF digestibility was 52.97% with 9.36 g and TDN digestibility was 71.42% with 10.92 g. There was no effect of the treatment for activities of rumination and total idle. Chewing time, number of bolus chewed and time for rumination of each bolli presented effect. Calcium hydroxide enabled greater intakes and digestibility of nutrients, especially from the cell wall, favoring the use of nutrients from the diet containing sugar cane, recommending a dose of 8-12 g.
Revista Brasileira De Zootecnia | 2008
Elisa Cristina Modesto; Geraldo Tadeu dos Santos; Maximiliane Alavarse Zambom; Julio Cesar Damasceno; Antonio Ferriani Branco; Duarte Vilela
The objective of this trial was to study the effects of substituting corn silage by cassava foliage silage in the diets of non lactating, pregnant dairy cows. The levels of substitution of corn silage by cassava foliage silage were 0, 20, 40 and 60%. Intake and apparent digestibilities of dry matter, organic matter, crude protein, neutral detergent fiber, total carbohydrates, no fiber carbohydrates were evaluated, and pH and ruminal ammonia nitrogen before and 2, 4, 6 and 8h after the morning feeding were also evaluated. Four non lactating pregnant cows (third trimester of gestation) rumen cannulated were allotted to a 4 × 4 Latin square design. The substitution of corn silage by different levels of cassava foliage silage did not affect the intake, digestibilities of nutrients and ruminal parameters, except for crude protein apparent digestibility and ruminal ammonia nitrogen. The crude protein apparent digestibility decreased as the corn silage was substituted by cassava foliage silage. Ruminal ammonia nitrogen also showed a linear negative effect eight hours after the morning feeding. The substitution of corn silage by cassava foliage silage, in all studied levels could be used for non lactating, pregnant dairy cows diets because did not change intake, ruminal parameters and digestibility of dry matter and nutrients, except for crude protein and ruminal ammonia nitrogen eight hours after morning feeding.
Revista Brasileira De Zootecnia | 2005
Cristiano Côrtes; Julio Cesar Damasceno; Nelson Massaru Fukumoto; Eduardo Shiguero Sakaguti; Geraldo Tadeu dos Santos; Claudete Regina Alcalde
ABSTRACT - The discriminatory potential of n -alkanes in tropical grasses ( Brachiaria brizantha Stapf. cv. Marandu, Cynodon dactylon Pers. cv. Coast-cross 1 and Panicum maximum Jacq. cv. Tanzânia 1) and legumes ( Arachis pintoi Koprov & Gregory. cv. Amarillo and Glycinewightii Verdc.) was evaluated. The forages were sampled in Spring, Summer and Winter, with four replications per species per season. T he n -alkanes C 24 to C 35, using C 32 and C 34 as internal markers, were considered in the analyses. Concentrations of n -alkanes in these species andtheir respective fractions (leaf blade, top and bottom portions of the stem and dead matter for grasses; leaves, top and bottom of stem and deadmatter for legumes) were evaluated by multivariate analysis. The discriminatory potential of n -alkanes was determined by the canonical variablesanalysis. The species and their respective fractions were divided into groups by cluster analysis. N- alkanes with the smallest potentialdiscriminatory potential were: C 26, C 29, C 25, C 27 and C 28 (spring), C 26, C 28, C 27, C 30 and C 29 (summer) and C 28, C 26, C 25, C 29 and C 27(winter). The