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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 | Heparanase: a new metastasis-associated antigen recognized in breast cancer patients by spontaneously induced memory T lymphocytes显示文摘 | Sommerfeldt N Beckhove P Ge Y Sehutz F Choi C Bucur M Domsehke C Sohn C Sehneeweis A Rom J Poll- mann D Leneht D Vlodavsky I Sehirrmaeher V | 2006 | Cancer Res2006，66，15： | 1 |
| 3 | Power system static-state estimation:Part I,II&III显示文摘 | Schweppe F C Wildes J Rom D B | 1970 | IEEE Transactions on Power Apparatus and Systems1970，89，1： | 1 |
| 4 | Coagulation gene polymorphisms as risk factors for myocardial infarction in young Indian Asians显示文摘 | Pegoraro R J Ranjith N Rom L | 2005 | Cardiovasc J S Afr2005，16，3： | 1 |
| 5 | Cyclodextrin-Modified Gold Nanospheres显示文摘 | Liu J Ong W Román E Lynn M J Kaifer A E | 2000 | Langmuir2000，16，： | 1 |
| 6 | Power system static-state estimation, part Ⅰ~Ⅲ显示文摘 | Schweppe F C Wildes J Rom D B | 1970 | IEEE Transactions on Power Apparatus and Systems1970，89，1： | 1 |
| 7 | Power system stat- ic state estimation, parts 1, 2, 3显示文摘 | Schweppe F C Wildes J Rom D B | 1970 | IEEE Transactions on Power Apparatus and Systems1970，89，1： | 1 |
| 8 | Power system static-state estimation, part Ⅰ~Ⅲ显示文摘 | Schweppe F C Wildes J Rom D B | 1970 | IEEE Transactions on Power Apparatus and Systems1970，89，1： | 1 |
| 9 | Crucial role of interleukin-1 beta and nitric oxide synthase in silica-induced inflammation and apoptosis in mice显示文摘 | Srivastava KD Rom WN Jagirdar J | 2002 | Am J Respir Crit Care Med2002，165，4： | 1 |
| 10 | Causes and possible controls of sun- burn on apples显示文摘 | Simpson J Rom C R Patterson M | 1988 | Good Fruit Grower1988，39，2： | 1 |
| 11 | The competitiveness of on-line assignments显示文摘 | Naor J Rom R | 1995 | Journal of Algorithms1995，18，： | 1 |
| 12 | Comparison of phenolic content of ‘Liberty' apple(Malus×domestica) on various root stocks显示文摘 | Garcia E Rom C R Murphy J B | 2004 | Acta Horticulturae2004，，1： | 1 |
| 13 | Comparison of phenolic content ofLiberty'apple (Malus~domestica) on various root stocks显示文摘 | Garcia E Rom C R Murphy J B | 2004 | Acta Horticulturae2004，658，1： | 1 |
| 14 | Severe acute exacerbations and mortality in patients with chronic obstructive pulmonary disease 显示文摘 | Soler - Catalufia J J Martinez - Garca MA Rom(m S6nchez P | 2005 | Thorax2005，60，11： | 1 |
| 15 | MicroRNA expression profiling in Imatinib-resistant chronic myeloid leukemia patients without clinically significant ABL1-mutations显示文摘 | SAN JOS(E) EN(E)RIZ E ROM(A)N G(O)MEZ J JIM(E)NEZ VELASCO A | | 0，，： | 1 |
| 16 | Effect of potassium content in the activity of K-promoted Ni/Al2O3 catalysts for the dry reforming of methane显示文摘 | JUAN-JUAN J ROMN-MARTNEZ M C ILLN-GMEZ M J | 2006 | Appl Catal A:General2006，301，1： | 1 |
| 17 | MicroRNA expressionprofiling in imatinib-resistant chronic myeloid leukemia patients without clinically significant ABL1-mutations显示文摘 | San José-Enériz E Román-Gómez J Jiménez-Velasco A | | 0，，01： | 1 |
| 18 | CEA,CA242, CA19-9, CA72 4 and hCGbeta in the diagnosis of recurrent colorectal cancer显示文摘 | Carpelan- Holmst rom M Louhimo J Stenman U H | 2004 | Tumour Biol2004，25，56： | 1 |
| 19 | On the effect of montmorillonite in the curing reaction of epoxy nanocomposites显示文摘 | Román F Montserrat S Hutchinson J M | 2007 | Journal of Thermal Analysis and Calorimetry2007，87，1： | 1 |
| 20 | Quantitative robust uncertainty prin- ciples and optionally sparse decompositions显示文摘 | Cands E Rom B J | 2006 | Founda- tions of Compute Math2006，6，2： | 1 |
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