Revista Brasileira De Zoologia最新文献_第3页

Crescimento dos tecidos muscular e adiposo de fêmeas bovinas de diferentes grupos genéticos no modelo biológico superprecoce 超早期生物模型中不同遗传群体母牛肌肉和脂肪组织的生长

Revista Brasileira De Zoologia Pub Date : 2010-03-01 DOI: 10.1590/S1516-35982010000300023

É. Rodrigues, M. B. Arrigoni, André Mendes Jorge, W. Bianchini, C. L. Martins, C. Andrighetto

{"title":"Crescimento dos tecidos muscular e adiposo de fêmeas bovinas de diferentes grupos genéticos no modelo biológico superprecoce","authors":"É. Rodrigues, M. B. Arrigoni, André Mendes Jorge, W. Bianchini, C. L. Martins, C. Andrighetto","doi":"10.1590/S1516-35982010000300023","DOIUrl":"https://doi.org/10.1590/S1516-35982010000300023","url":null,"abstract":"The objective of this study was to evaluate the growth of young heifers from different genetic groups in an intensive meat production system. One hundred and thirty two heifers from four different genetics groups were used: 18 - ¾ Canchim × ¼ Nellore (¾ CN), 18 - ½ Canchim × ½ Nellore (½ CN), 24 Simbrasil - ⅝ Simmental × ⅜ Nellore (SIMB) and 72 - Three way cross ¼ Simmental × ¼ Nellore × ½ Angus. The heifers were weaned at 210 days of age with 247.4 ± 16.5 kg live weight (LW), from creep-feeding during the rearing phase and 132 ± 14 days in feedlot system. The animals were slaughtered when they reached 350 kg LW and 5 mm backfat thickness (BFT). There was no difference among the genetic groups for average daily weight gain but the three way cross heifers presented the highest values (1.07 kg/day). There were no differences for initial ribeye area (REA), but the three cross animals obtained larger values of initial backfat thickness (BFT) and initial rump fat thickness (RFT). In the animals in the three cross group, the final ribeye area and adjusted to 100 kg live weight (LW) was lower than that observed in the other groups, but the final body weight was superior to the Simbrasil group, with intermediate feedlot time. When the REA and RFT values are fitted to the smallest number of days in feedlot (114 days), the Simbrasil animals present greater REA and the three-cross and Simbrasil higher RFT.","PeriodicalId":300681,"journal":{"name":"Revista Brasileira De Zoologia","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133537039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Effect of breed type and ionophore supplementation on growth and carcass characteristic in feedlot hair lambs 品种类型和添加离子离子对饲养场毛羊生长和胴体特性的影响

Revista Brasileira De Zoologia Pub Date : 2010-03-01 DOI: 10.1590/S1516-35982010000300024

J. Salinas-Chavira, Alfredo Lara-Juarez, Abraham Gil-González, J. Jiménez-Castro, R. García-Castillo, E. Ramírez-Bribiesca

{"title":"Effect of breed type and ionophore supplementation on growth and carcass characteristic in feedlot hair lambs","authors":"J. Salinas-Chavira, Alfredo Lara-Juarez, Abraham Gil-González, J. Jiménez-Castro, R. García-Castillo, E. Ramírez-Bribiesca","doi":"10.1590/S1516-35982010000300024","DOIUrl":"https://doi.org/10.1590/S1516-35982010000300024","url":null,"abstract":"The effects of supplementing feedlot diets with ionophores and breed type were assessed on growth rate and carcass characteristics in hair lambs. Twenty four intact males, 12 Pelibuey × Dorper (PDo) and 12 Pelibuey × Damara (PDa) lambs, 17.9 ± 3.7 kg initial weight, were housed in individual pens for a 60-d feeding trial. The lambs were assigned randomly into four diets: control without additives (C); 25 µg/g monensin (M); 28 µg/g salinomycin (S); 28 µg/g S for 20 d, and 25 µg/g M for the next 40 d (SM). Each diet was supplied to six lambs. Data were analyzed as a randomized complete block design in a 4 × 2 factorial arrangement, with four diets and two breed types of hair lambs (PDo and PDa). All diets were formulated to contain 14% CP and 2.6 Mcal ME/kg dry matter. At the end of the feeding trial carcass images were recorded in the last intercostal space (12th and 13th ribs) using ultrasound equipment to measure the Longissimus dorsi muscle area and subcutaneous fat (SF). The average daily gain (ADG), daily dry matter intake, feed:gain ratio, subcutaneous fat and Longissimus dorsi area were not affected by ionophore supplementation.. The Pelibuey × Dorper group tended to show better average daily gain than Pelibuey × Damara (262 g/d and 235 g/d, respectively). Daily dry matter intake, feed:gain ratio and subcutaneous fat were not affected by breed type. The Pelibuey × Dorper lambs had greater Longissimus dorsi area (16.74 cm2) than the Pelibuey × Damara (14.29 cm2) lambs. The growth rate was not influenced by the inclusion of ionophores. Pelibuey × Dorper lambs showed better average daily gain and carcass characteristics than Pelibuey × Damara lambs.","PeriodicalId":300681,"journal":{"name":"Revista Brasileira De Zoologia","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133556587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Grãos de girassol ou gordura protegida em dietas com alto concentrado e ganho compensatório de cordeiros em confinamento 饲喂高精料和补偿性增重饲粮中的葵花籽或保护脂肪

Revista Brasileira De Zoologia Pub Date : 2010-03-01 DOI: 10.1590/S1516-35982010000300016

A. C. Junior, J. Ezequiel, R. L. Galati, J. Gonçalves, V. C. Santos, R. Sato

{"title":"Grãos de girassol ou gordura protegida em dietas com alto concentrado e ganho compensatório de cordeiros em confinamento","authors":"A. C. Junior, J. Ezequiel, R. L. Galati, J. Gonçalves, V. C. Santos, R. Sato","doi":"10.1590/S1516-35982010000300016","DOIUrl":"https://doi.org/10.1590/S1516-35982010000300016","url":null,"abstract":"The effects of three diets and two feeding managements were assessed on feedlot lamb performance and carcass. Thirty six lambs with initial 18.7 ± 2.4 kg weight were distributed in a randomized complete block design in a 3 × 2 factorial arrangement and were fed a free-lipid diet, and a sunflower grains-added diet or a protected fat-added diet. Six lambs on each diet were submitted to feeding restriction management and later compensatory gain, while the other half was fed ad libitum throughout the feedlot period. Dry matter intake, weight gain and feed conversion ratio, urea and blood cholesterol, carcass characteristics and slaughter by-products were evaluated. During realimentation period the intake of lambs that underwent feeding restriction did not differ from the freely-fed animals. It was not affected by the diet but at the end of this period, the accumulated intake was 11.8% smaller for those lambs previously submitted to feeding restriction. Feed intake to slaughter weight was not influenced by the feeding management. In the restriction period, the blood cholesterol levels were 24% higher than those without restriction, but there was no difference during the realimentation period. The lipids in the diets increased the cholesterol blood levels in both the restriction and realimentation periods and reduced urea blood levels during the realimentation period. The performance, evaluated at slaughter weight, was damaged by the restriction management. There were no effects of feeding management or diet on the carcass parameters. Lipid sources increased the total fat proportion and decreased the gastrointestinal tract content. The feeding management with restriction damages weight gain and feed conversion ratio in lambs up to slaughter.","PeriodicalId":300681,"journal":{"name":"Revista Brasileira De Zoologia","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128241828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 23

Effects of dietary energy and nitrogen supplements on rumen fermentation and protozoa population in buffalo and zebu cattle 饲粮添加能量和氮对水牛和瘤胃发酵及原生动物种群的影响

Revista Brasileira De Zoologia Pub Date : 2010-03-01 DOI: 10.1590/S1516-35982010000300014

R. Franzolin, F. Rosales, W. V. Soares

{"title":"Effects of dietary energy and nitrogen supplements on rumen fermentation and protozoa population in buffalo and zebu cattle","authors":"R. Franzolin, F. Rosales, W. V. Soares","doi":"10.1590/S1516-35982010000300014","DOIUrl":"https://doi.org/10.1590/S1516-35982010000300014","url":null,"abstract":"The effects were assessed of two energy sources in concentrate (ground grain corn vs. citrus pulp) and two nitrogen sources (soybean meal vs. urea) on rumen metabolism in four buffaloes and four zebu cattle (Nellore) with rumen cannula and fed in a 4 × 4 Latin square design with feeds containing 60% sugar cane. Energy supplements had no effect on the rumen ammonia concentration in cattle, but ground grain corn promoted higher ammonia level than citrus pulp in buffalo. Urea produced higher ammonia level than soybean meal in both animal species. On average, the buffaloes maintained a lower rumen ammonia concentration (11.7 mg/dL) than the cattle (14.5 mg/dL). Buffaloes had lower production of acetic acid than cattle (58.7 vs. 61.6 mol/100 mol) and higher of propionic acid (27.4 vs. 23.6 mol/100 mol). There was no difference in the butyric acid production between the buffaloes (13.6 mol/100 mol) and cattle (14.8 mol/100 mol) and neither in the total volatile fatty acids concentration (82.5 vs. 83.6 mM, respectively). The energy or nitrogen sources had no effect on rumen protozoa count in either animal species. The zebu cattle had higher rumen protozoa population (8.8 × 105/mL) than the buffaloes (6.1 × 105/mL). The rumen protozoa population differed between the animal species, except for Dasytricha and Charonina. The buffaloes had a lower Entodinium population than the cattle (61.0 vs 84.9%, respectively) and a greater percentage of species belonging to the Diplodiniinae subfamily than the cattle (28.6 vs. 1.4%, respectively). In cattle, ground corn is a better energy source than citrus pulp for use by Entodinium and Diplodiniinae. In the buffaloes, the Entodinium are favored by urea and Diplodiniinae species by soybean meal.","PeriodicalId":300681,"journal":{"name":"Revista Brasileira De Zoologia","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129476696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 35

Grupo genético, sistema de acasalamento e efeitos genéticos aditivos e não-aditivos nas características de musculosidade da carcaça de novilhos oriundos do cruzamento rotativo Charolês × Nelore 遗传群、交配系统及加性和非加性遗传对夏洛来×内洛尔旋转杂交阉牛胴体肌肉特性的影响

Revista Brasileira De Zoologia Pub Date : 2010-03-01 DOI: 10.1590/S1516-35982010000300007

Paulo Santana Pacheco, J. Restle, I. L. Brondani, D. C. A. Filho, J. Pádua, F. R. C. Miotto

{"title":"Grupo genético, sistema de acasalamento e efeitos genéticos aditivos e não-aditivos nas características de musculosidade da carcaça de novilhos oriundos do cruzamento rotativo Charolês × Nelore","authors":"Paulo Santana Pacheco, J. Restle, I. L. Brondani, D. C. A. Filho, J. Pádua, F. R. C. Miotto","doi":"10.1590/S1516-35982010000300007","DOIUrl":"https://doi.org/10.1590/S1516-35982010000300007","url":null,"abstract":"The carcasses of 800 steers derived from rotational crossbreeding between Charolais and Nellore breeds, slaughtered at two years of age, were evaluated. The evaluated characteristics were the following: conformation, cushion thickness, arm perimeter, Longissimus dorsi area, Longissimus dorsi area divided by 100 kg of cold carcass weight (AOL100). Two models were used for the data analyses: Model 1 included the genetic effects of the breeding system and steer genetic group nested within the breeding system and Model 2 corresponded to Model 1, but the breeding and genetic group were substituted by the covariables corresponding to the percentage of Charolais breed of the individual and its mother and the percentage of heterozygosis of the individual and its mother. From the analysis in Model 1, Charolais steers were superior to the Nelores in all assessed traits. The retained heterosis was significant for conformation (4.2%), cushion thickness (3.2%), arm perimeter (4.2%), Longissimus dorsi area (7.3%) and AOL100 (-6.7%). The individual additive genetic effect of Charolais breed regarded to Nelore was 1.89 points for conformation, 1.37 cm for cushion thickness, 2.55 cm for arm perimeter, 12.70 cm² for Longissimus dorsi area and 3.13 cm² for AOL100. The individual heterotic genetic effect (regarded to the straightbred mean) was 3.9% for conformation, 3.8% for cushion thickness, 3.1% for arm perimeter and 9.8% for Longissimus dorsi area. Maternal heterosis is significant only for arm perimeter (1.6%) and AOL100 (-5.4%). The nonadditive genetic effects, represented by epistasis and linkage, do not influence the evaluated characteristics.","PeriodicalId":300681,"journal":{"name":"Revista Brasileira De Zoologia","volume":" 48","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113950541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Maturao sexual e parmetros reprodutivos em touros da raa Nelore criados em sistema extensivo 粗放饲养的内洛尔牛的性成熟和生殖参数

Revista Brasileira De Zoologia Pub Date : 2010-03-01 DOI: 10.1590/S1516-35982010000300008

T. D. Silveira, J. B. Siqueira, S. Guimarães, T. A. R. Paula, T. M. Neto, J. D. Guimarães

{"title":"Maturao sexual e parmetros reprodutivos em touros da raa Nelore criados em sistema extensivo","authors":"T. D. Silveira, J. B. Siqueira, S. Guimarães, T. A. R. Paula, T. M. Neto, J. D. Guimarães","doi":"10.1590/S1516-35982010000300008","DOIUrl":"https://doi.org/10.1590/S1516-35982010000300008","url":null,"abstract":"The objective of this study was to verify the stage of sexual maturity, occurrence of the testicular format and the relationship among reproductive characteristics. Data were used from 5903 Nellore bulls averaging 21 months submitted to the soundness evaluation from 1999 to 2003. At the time of the evaluation, the following characteristics were recorded: scrotal circumference at soundness evaluation (31.99 ± 2.23 cm), left testicular length (11.21 ± 0.98 cm) and right testicular length (11.26 ± 0.97 cm), left testicular width (5.92 ± 0.44 cm) and right testicular width (5.97 ± 0.46 cm), testicular format (1.72 ± 0.46), testicular volume (632.21 ± 132.72 cm3), individual motility (69.56 ± 12.31%), vigor (2.87 ± 0.61), as well as total defects (22.19 ± 11.13%) and major defects (15.86 ± 10.45%) of the spermatozoa. The frequencies of the testicular formats were long (30.80%), long-moderate (66.19%), long-oval (2.49%), oval-spherical (0.02%) and spherical (0.04%). Correlations between the scrotal circumference and the reproductive traits were positive. Scrotal circumference is a good trait for selection of young Nellore bulls. More than 70% of the animals studied are sexually mature at 21 months old.","PeriodicalId":300681,"journal":{"name":"Revista Brasileira De Zoologia","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129132403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 27

Bionutritional efficiency of crossbred beef cattle finished on feedlot andslaughtered at different body weights 不同体重育成和屠宰的杂交肉牛的生物营养效率

Revista Brasileira De Zoologia Pub Date : 2010-03-01 DOI: 10.1590/S1516-35982010000300018

R. Mello, A. Queiroz, M. H. Faria, D. S. Henrique, F. Maldonado

{"title":"Bionutritional efficiency of crossbred beef cattle finished on feedlot andslaughtered at different body weights","authors":"R. Mello, A. Queiroz, M. H. Faria, D. S. Henrique, F. Maldonado","doi":"10.1590/S1516-35982010000300018","DOIUrl":"https://doi.org/10.1590/S1516-35982010000300018","url":null,"abstract":"The objective of this study was to assess the bionutritional efficiency of crossbred F1 Red Angus × Nellore (½ RA ½ N) and F1 Blonde D'Aquitaine × Nellore (½ BA ½ N) young bulls finished on feedlot and slaughtered at 480, 520 and 560 kg body weight. A completely randomized experimental design in a 2 × 3 (genetic group × slaughter weight) factorial arrangement with six replicates was used. The ½ BA ½ N young bulls showed higher kidney, pelvic and inguinal fat (KPIF, kg and % BW) and lower multivariate biological nutritional index (MBNI) and residual feed intake than ½ RA ½ N young bulls. The young bulls slaughtered at heavier weight had larger ribeye area (cm2), fat thickness over the 12-13th rib, fat thickness over the rump, KPIF (kg and % BW), dry matter intake (DMI, kg/d), net energy intake (MJ/d) and metabolizable protein intake (g/d), and MBNI compared to young bulls slaughtered at lighter weight. Furthermore, the ½ BA ½ N young bulls slaughtered at 480 kg had lower feed conversion than the others. On the other hand, the average daily weight gain (kg/d), DMI (% BW and g/BW0.75), feed efficiency and Kleiber ratio did not differ between genetic group, slaughter weight and genetic group versus slaughter weight interaction. Therefore, crossbred F1 Blonde D'Aquitaine × Nellore young bulls and animals slaughtered at lighter weights are more bionutritionally efficient in the finishing phase on feedlot.","PeriodicalId":300681,"journal":{"name":"Revista Brasileira De Zoologia","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114806005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Avaliação nutricional de estratégias de suplementação para bovinos de corte durante a estação da seca 肉牛旱季补充策略的营养评价

Revista Brasileira De Zoologia Pub Date : 2010-03-01 DOI: 10.1590/S1516-35982010000300021

Eduardo Henrique Bevitori Kling de Moraes, M. F. Paulino, S. C. V. Filho, Kamila Andreatta Kling de Moraes, E. Detmann, Marcos Gonçalves de Souza

{"title":"Avaliação nutricional de estratégias de suplementação para bovinos de corte durante a estação da seca","authors":"Eduardo Henrique Bevitori Kling de Moraes, M. F. Paulino, S. C. V. Filho, Kamila Andreatta Kling de Moraes, E. Detmann, Marcos Gonçalves de Souza","doi":"10.1590/S1516-35982010000300021","DOIUrl":"https://doi.org/10.1590/S1516-35982010000300021","url":null,"abstract":"ABSTRACT - The objective of this study was to evaluate the effect of the frequency of protein supplementation on thenutritional characteristics of beef cattle during the dry season. Five Nellore crossbred steer were used 290.0 kg LW, fistulatedin the rumen and esophagus, distributed in a 5 × 5 Latin square design. The experimental area consisted of five 0.40 ha Brachiariadecumbens paddocks. The experiment consisted of five 15-day experimental periods, with the first seven days for the animalsto adapt. The strategies studied were: self-feed supplementation and supplementation (1.0 kg/animal/day) offered at threefrequencies: three times/week (Monday, Wednesday and Friday), five times/week (Monday to Friday) and six times/week(Monday to Saturday) and daily. There were no effects of the different strategies on the intake expressed in kg/day or LWpercentage. The supplementation frequency affected the total DM apparent digestibility and ruminal crude protein apparentdigestibility that were higher in the self-feed supplementation group. The mean pH values, observed on the day when the animalswere not supplemented were: 6.54 ± 0.13; 6.48 ± 0.15 and 6.61 ± 0.07, respectively for, the frequencies 3 times/week, 5 times/week and 6 times/week. The NH","PeriodicalId":300681,"journal":{"name":"Revista Brasileira De Zoologia","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130501431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 28

Fermentação ruminal e produção de metano em bovinos alimentados com feno de capim-tifton 85 e concentrado com aditivos 用添加剂浓缩的tifton 85干草饲喂牛瘤胃发酵及产甲烷

Revista Brasileira De Zoologia Pub Date : 2010-03-01 DOI: 10.1590/S1516-35982010000300022

A. R. Rivera, T. T. Berchielli, Juliana Duarte Messana, P. Velásquez, Ana Vera Martins Franco, L. B. Fernandes

{"title":"Fermentação ruminal e produção de metano em bovinos alimentados com feno de capim-tifton 85 e concentrado com aditivos","authors":"A. R. Rivera, T. T. Berchielli, Juliana Duarte Messana, P. Velásquez, Ana Vera Martins Franco, L. B. Fernandes","doi":"10.1590/S1516-35982010000300022","DOIUrl":"https://doi.org/10.1590/S1516-35982010000300022","url":null,"abstract":"The objective of this study was to evaluate the effect of monensin, yeast complex, unsaturated fatty acids and amino acids on dry matter and nutrient intake, total and partial digestibility and ruminal parameters of ruminal fermentation (pH, ammonia nitrogen concentration and short chain fatty acids), the protozoa population and methane production. Six castrated steers, body weight 530 ± 15 kg were used, receiving yeast complex, polyunsaturated fatty acids and amino acids (5 g/dia), monensin (5 g/dia), caulim (5g/dia, used as control), added to a diet consisting of Tifton 85 (Cynodon spp.) hay and concentrate at 80:20. A randomized complete block design was used to analyze and a split-plot design was used to analyze ruminal fermentation and methane production. The intakes were influenced by monensin in the diet, and no difference was observed among the additives. The dry matter and nutrients digestibilities, were not influenced by supplementing with additives. The acetate:propionate ratio in the animals fed the diet with monensin was smaller than in those that received the yeast complex and polyunsaturated fatty acids and amino acids, decreasing the energy loss in the form of methane. The pH and ammonia nitrogen concentration were adequate to microbial growth. The methane concentration was not altered with the use of the amino acids tested.","PeriodicalId":300681,"journal":{"name":"Revista Brasileira De Zoologia","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126930316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 24

Desempenho produtivo de fêmeas leiteiras alimentadas com silagem de milho e concentrado à base de farelo de soja ou farelo de algodão 饲喂玉米青贮和以豆粕或棉粕为基础的精料的奶牛生产性能

Revista Brasileira De Zoologia Pub Date : 2010-03-01 DOI: 10.1590/S1516-35982010000300025

S. A. Santos, José Maurício de Souza Campos, S. C. V. Filho, E. Detmann, A. Oliveira, S. Souza

{"title":"Desempenho produtivo de fêmeas leiteiras alimentadas com silagem de milho e concentrado à base de farelo de soja ou farelo de algodão","authors":"S. A. Santos, José Maurício de Souza Campos, S. C. V. Filho, E. Detmann, A. Oliveira, S. Souza","doi":"10.1590/S1516-35982010000300025","DOIUrl":"https://doi.org/10.1590/S1516-35982010000300025","url":null,"abstract":"ABSTRACT - Diets for dairy heifers were assessed with corn silage and soybean or cotton seed based concentrate. Fourexperimental diets consisting of the combination of two concentrate levels, 1 or 2 kg, and two protein sources, soybean mealor 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 nosignificant effect of the treatments for DM, NDF, OM and NDT digestibility but the protein source influenced the CP, EEand NFC digestibility. There was an effect of concentrate quantity for weight gain (WG), and there was effect of the concentratequantity × protein source interaction for weight gain per cm of height gain of the cernelha. The diet consisting of 1 kg cottonseed based concentrate was insufficient to reach 800 g/day weight gain and diets consisting of 2 kg concentrate resulted in greaterweight gain. However, the diet consisting of 2 kg soybean meal based concentrate was more efficient because it gave greaterlinear growth to the heifers with an 820g mean gain per day. Body weight prediction equations based on the thorax perimeterare more accurate in prediction compared to the other linear measurements.Key Words: intake, energy, dairy heifers, protein","PeriodicalId":300681,"journal":{"name":"Revista Brasileira De Zoologia","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130186942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2