Desempenho de novilhos alimentados com dieta suplementar em pastos de capim-mombaça

The objective of this work was to evaluate the effect of supplements feeding on growth of calves grazing a Panicum maximum cv. Mombaça pasture during the dry season. The experimental design was a randomized blocks with three treatments and three replications. The treatments were: mineral salt ad libidum; multiple mixture (MM) fed at 0.2% of live weight (PV); and, concentrate feed (SC) fed at 0.7% of PV. Thirty six weaned calves averaging eight months and 192 kg of initial live weight were utilized. The masses and pasture components, nutritive value and rate of forage growth were evaluated. Animal performance was measured as average daily gain (ADG) and live weight gain (LWG). The supplemental feeding was adjusted after weighing. There was no difference between periods for forage mass and leaf: stem ratio. The highest values for forage green mass, leaf blades mass and stem percentage were observed in the first trial period. The canopy height and the available forage on offer did not differ among treatments. The percentage of dead was higher for the last periods of evaluation. The leaf: stem ratio and the leaf percentage were greater in the second period. There was significant difference (p<0,05) among treatments for the ADG and were 250, 460 and 770 g/day for salt, MM and SC, respectively. The biggest LWG was observed in the treatment SC. contents of PB, DIVMO, NDF and LDA on leaf blades, thatched roofs and dead material dead not differ among treatments. The highest GPV was observed in the SC treatment. The contents of PB, DIVMO, NDF and LDA for leaf blades stem and dead material did not differ among treatments. Independent of the use supplements , it is possible to keep steers gaining weight, during dry season, since the stocking rate is appropriately adjusted

Correlações entre características morfogênicas e estruturais em pastos de capim-braquiária

The analysis of both morphogenetic and structural characteristics of pasture allows us to understand the response patterns of the plant to the environment. Thus, this study was conducted to evaluate the associations between the morphogenetic and structural characteristics of Brachiaria decumbens under continuous grazing by cattle. The development of individual tillers in pastures was evaluated under two grazing management strategies during three seasons (winter, spring and summer). Pearson correlations between variables were estimated. The lengths of leaf and stem, number of tillers and leaves per tiller, rates of leaf appearance and elongation of leaf and stem of B. decumbens were positively correlated. There was a negative relationship between appearance and lifespan of leaves (r = -0.89). However, positive correlations between leaf appearance rate and number of tillers (r = 0.64) and between length of stem and leaf senescence rate (r = 0.63) were determined. The B. decumbens modifies its morphogenesis to better adapt to climate and grazing management.

Control de la chinche de los pastos Collaria scenica (Hemiptera: Miridae) con nematodos entomopatógenos en invernadero

We studied the efficacy of infective juveniles (IJ) of Steinernema sp. strain JCL024 and Heterorhabditis sp. strain SL0708 on adults and nymphs of Collaria scenica under greenhouse conditions. Five doses were evaluated (2, 16, 78, 160 IJ) cm-2 leaf) for each nematode. The experiment was evaluated for 21 days every 24 hours, making mortality counts and assessment of damage on Kikuyo grass. The bugs showed 100% mortality after 15 days. Each bug produced an average of 13,000 IJ/6 days. As for the damage did not reach level 2 within 21 days prior to treatment without nematodes that damage introduced 3 with necrosis and apical leaf curl. Thus, Steinernema sp. strain JCL024 and Heterorhabditis sp. strain SL0708 exercised control bug on the grass and kept under the level of damage to the foliage.

Morforgênese e estrutura de pastos de capim-tanzânia manejados com diferentes índices de área foliar residual, mantido sob lotação intermitente por caprinos

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Uso de fontes lipídicas na recria de bovinos mantidos em pastos de Brachiaria brizantha cv. Xaraés

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Dinâmica de carbono e nitrogênio em pastos de capim-xaraés submetidos a diferentes resíduos pós-pastejo

Pós-graduação em Zootecnia - FCAV

Morfogênese, características estruturais e acúmulo de forragem em pastos de capim-Tifton-85 manejados com diferentes IAF residual

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Influência da estrutura dos pastos de capim tanzânia (Panicum maximum Jacq.) sobre o comportamento ingestivo de cabras F1 Boer x Saanen

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Carcaterísticas do dossel forrageiro e comportamento ingestivo de fêmeas da raça Holandesa em lotação rotacionada de pastos de capim-Marandu sob intensidades de pastejo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Compostos de reserva das plantas e atividade enzimática do solo em pastos de Brachiaria manejados sob ofertas de forragem e lotação rotacionada

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Características morfogênicas e estruturais de pastos de capim-xaraés submetidos a intensidades de pastejo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Desempenho de novilhos de corte em pastos de capim-tanzânia sob quatro alturas de desfolha

This study was carried out to evaluate the effects of four grazing heights under continuous stocking of Tanzânia grass (Panicum maximum Jacq. Cv. Tanzânia) on the stocking rate, performance and beef production per hectare. The experimental area was 12 hectares, divided into paddocks with one hectare each, with three replicates each (20, 40, 60 and 80 cm). There were three male Nellore bovines per paddock, adding animals as needed to adjust the desired heights in a completely randomized design. The stocking rate had a negative linear function of grazing heights in all seasons regarding yield per hectare, while the average daily gain showed opposite behavior. Apparently, Tanzânia grass heights between 40 and 60cm under continuous stocking enable good average daily weight gain in beef cattle, and high yield per hectare.

Emissão de CO2, características do dossel e acúmulo de forragem em pastos de capim-pensacola sob frequências de desfolhação

The aim of this study was to evaluate CO2 emission, canopy characteristics and herbage accumulation in pastures of pensacola bahiagrass under frequencies of defoliation. The experiment was conducted at the Universidade Estadual Paulista Julio de Mesquita Filho, Faculty of Agrarian Sciences and Veterinary of UNESP, Jaboticabal, São Paulo, Brasil. The experimental period was from May 3rd to July 26th 2012. The experimental area comprised 28 m² of pensacola bahiagrass (Paspalum notatum Flügge), divided into 10 plots for allocation of treatment (frequencies of defoliation = 2 or 4 weeks). The following variables were studied: canopy height, light interception, leaf area index, herbage accumulation, tiller density, CO2 emissions, soil temperature and moisture. The frequencies of defoliation in the months of May, June and July slightly affect pensacola bahiagrass characteristics. CO2, soil temperature and moisture are more associated to environmental conditions (months of evaluation) than to the frequencies of defoliation imposed to the canopies.

Alturas de pastos de capim-marandu na interface solo-planta

Pós-graduação em Zootecnia - FCAV

Características estruturais do dossel, produção de forragem e desempenho de cordeiros em pastos de tifton 85 sob lotação intermitente

Pós-graduação em Zootecnia - FCAV