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| 1 | Energetic-protein supplementation in the last 60 days of gestation improves performance of beef cows grazing tropical pastures显示文摘Background: Nutrition is one of the most important factors that affect animal performance, and it therefore also impacts on financial results in beef systems. In this way, finding the best strategy for feeding supplements is of paramount importance. Aiming to evaluate the effect of supplement feeding strategies for beef cows in the last third of gestation, two experiments were conducted. In Experiment 1, 35 pregnant Nellore cows were assigned to a completely randomized design with four treatments: control, which received no supplement; supplementation for the last 30 d of gestation(30-d; 3.0 kg/d); supplementation for the last 60 d of gestation(60-d; 1.5 kg/d); or supplementation for the last 90 d of gestation(90-d; 1.0 kg/d). All supplemented treatments received the same total amount of supplement throughout the experiment: 90 kg(20% of crude protein). A second experiment(Experiment 2) was delineated to evaluate the effects of the amounts offered in Experiment 1 on intake and metabolism. Four multiparous pregnant Nellore cows were assigned to a 4 × 4 Latin square design, with periods of15 d each.Results: There was a linear effect of the number of days of supplementation on calving body weight(BW; P < 0.05)and a quadratic effect on BW change from parturition to d 31 post-calving(P < 0.05), with cows on the 60-d strategy losing less BW post-calving. No difference was found in offspring birth BW(P > 0.10). A significant linear effect on interval from parturition to conception(P < 0.05) was observed, with the highest calving to conception interval being observed in the 90-d strategy. The level of supplementation did not affect forage intake or neutral detergent fiber digestibility(P > 0.10). Nitrogen excreted through urine tended to increase linearly with the level of supplementation(P < 0.10).Conclusion: Providing 1.5 kg of supplement during the last 60 d of gestation improves cow performance after calving, reducing the magnitude of BW lost, and reduces the number of days from calving to re-conception in the following breeding season compared to the usually recommended period of supplementation of 90 d pre-partum. | Aline Gomes da Silva Mário Fonseca Paulino Edenio Detmann Henrique Jorge Fernandes Lincoln da Silva Amorim Román Enrique Maza Ortega Victor Valério de Carvalho Josilaine Aparecida da Costa Lima Felipe Henrique de Moura Mariana Benevides Monteiro Jéssika Almeida Bitencourt | 2018 | Journal of Animal Science and Biotechnology2018，9，1： | 2 |
| 2 | Inhibition of adherence of Candida albicans and Candida dubliniensis to a resin composite restorative dental material by salivary secretory IgA and monoclonal antibodies显示文摘 | Maza JL Ponton J | 2004 | Oral Dis2004，10，2： | 1 |
| 3 | Lipid bilayers including cholesterol as vehicles for acid dyes in wool dyeing显示文摘 | De la Maza A Parra J L Manich A | 1993 | Textile Research Journal1993，63，11： | 1 |
| 4 | Original research papersTLC-FID analysis of the ceramide content of internal wool lipids显示文摘 | Fonollosa J MartíM Maza A | 2000 | Journal of Planar Chromatography-Modern TLC2000，13，2： | 1 |
| 5 | Dyeing wool at low temperatures:new method using liposomes显示文摘 | Marti M De La Maza A Parra J L | 2001 | Textile Research Journal2001，71，8： | 1 |
| 6 | Anticryptosporidial activity of furan derivative G1 and its inclusion complexwith beta-cyclodextrin 显示文摘 | CASTRO HERMIDA J A GOMEZ COUSO H ARES MAZAS M E | 2004 | J Pharm Sci2004，93，1： | 1 |
| 7 | Microwave-assisted sulfonation of heparin oligosaccharides 显示文摘 | Maza S de Paz J L Nieto P M | 2011 | Tetrahedron Lett2011，52，： | 1 |
| 8 | Using liposomes in wool chlorination:stability of chlorine liposomes and their application on wool fibers显示文摘 | Maza A D L A Parra J L Bosch P | 1991 | Textile Research Journal1991，61，6： | 1 |
| 9 | Weight increase is associated with skeletal muscle immunostaining for advanced glycation end products, receptor for advanced glycation end products, and oxidation injury 显示文摘 | de la Maza MP Uribarri J Olivares D | 2008 | Rejuvenation Res2008，11，： | 1 |
| 10 | Surfactants in wool chlorination显示文摘 | De La Maza A Leal J S Parra J L | 1991 | Textile Research Journal1991，61，2： | 1 |
| 11 | Tsunami wave interaction with mangrove forests: A 3-D numerical approach显示文摘 | MAZA M LARA J L LOSADA I J | 2015 | Coastal Engineering2015，98，： | 1 |
| 12 | Use of a fluorescence spectroscopy technique to study the adsorption of sodium dodecylsulfonate on liposomes显示文摘 | M Cócera O López J Estelrich J.L Parra A de la Maza | 2001 | Chemistry and Physics of Lipids2001，，1： | 1 |
| 13 | An analysis of therapeutic decision making regarding immunosuppressive chemotherapy for peripheral ulcerative keratitis 显示文摘 | Tauber J de la Maza SM Hoang-Xuan T | 1990 | Cornea1990，9，1： | 1 |
| 14 | Large unilamellar vesicle liposomes for wool dyeing:stability of dye-liposome systems and their application on untreated wool显示文摘 | De La Maza A Parra J L Bosch P | 1992 | Textile Research Journal1992，62，7： | 1 |
| 15 | Effects of virtual reality-enhanced exercise equipment on adherence and exercise-induced feeling states 显示文摘 | ANNESI J J MAZAS J | 1997 | Perceptual and Motor Skills1997，85，3： | 1 |
| 16 | The value of open ocean ecosystems: A case study for the spanish exclusive economic zone显示文摘 | Murillas- Maza A Virto J Gallastegui M C | 2011 | Natural Resources Forum2011，35，2： | 1 |
| 17 | Vesicle-micelle structural transition of phosphatidylcholine bilayers and Triton X-100显示文摘 | De la Maza A Parra J L | 1994 | Biochem J1994，303，： | 1 |
| 18 | Foreign direct investment in Spain: Re- gional distribution and determinants 显示文摘 | Villaverde J Maza A | 2012 | International Business Review2012，21，4： | 1 |
| 19 | Comparison of oocyst shedding and the serum immune response to Cryptosporidium parvum in cattle and pigs显示文摘 | Quilez J Ares Mazas E Sanchez Acedo C | | 0，，： | 1 |
| 20 | An apparatus based on a spherical resonator for measuring the speed of sound in gases and for determining the boltz- mann constant显示文摘 | SEGOVIA J J MAZA D V MARTIN M C | 2010 | International Journal of Thermophys- ics2010，，31： | 1 |
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