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Navegando PPGZoo por Autor "718.096.431-04"

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    Efeito do consórcio de gramíneas com feijão-caupi na entressafra sobre a produção de bovinos de corte
    (Universidade Federal de Mato Grosso, 2021-08-20) Mattos, Jenifer Santos de; Silva, Francine Damian da; 009.510.500-01; http://lattes.cnpq.br/9838212017844050; Cabral, Carlos Eduardo Avelino; 019.717.471-06; http://lattes.cnpq.br/6739111102181898; Cabral, Carlos Eduardo Avelino; 019.717.471-06; http://lattes.cnpq.br/6739111102181898; Cabral, Carla Heloisa Avelino; 718.096.431-04; http://lattes.cnpq.br/0254810575145100; Silva, Francine Damian da; 009.510.500-01; http://lattes.cnpq.br/9838212017844050
    Legumes use intercropped with grasses is advantageous mainly due to the assimilation of atmospheric nitrogen carried out by the legumes, which reduces the demand for nitrogen fertilizers, as well as increasing the nutritive value of pasture. Therefore, in intercropped cultivation, legumes that are not antagonistic to grasses must be selected, in order to compromise the system's productivity. One possibility for use in pastures is the use of cowpea (Vigna unguiculata) and, therefore this research aimed to identify whether cowpea offers an increase in animal performance when intercropped with grasses in the off season. Experiment was carried out in the municipality of Itiquira, Mato Grosso, in a randomized block design, in a 4x2 factorial scheme. The treatments consisted of four grasses cultivation (Urochloa ruziziensis cv. Kennedy, Urochloa brizantha cv. Paiaguás, Urochloa brizantha cv. Piatã and Panicum maximum cv. BRS Tamani) in two systems (monoculture and intercropping with cowpea cv. BRS Tumucumaque) in the off-season of 2016 and 2017. Systems were sown in succession to soybeans (March), and the animals entered the area in May. Samples were collected in May, June and July to measure forage mass, morphological, botany and chemical-bromatological composition. The intercropping of grasses with cowpea provided an increase in stocking rate for Tamani and Paiaguás grasses, compared to the monoculture system. Furthermore, the intercropping with cowpea provided an increase in weight gain per area in all grasses, except for Piatã grass. In addition, pastures with cowpea had higher crude protein content, with the exception of Paiaguás. Also, all the grasses tested can be used in the off-season in succession to soybean and the intercropping of grasses with cowpea, in general, increases the performance of beef cattle during the off-season.
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    Suplemento proteico e monensina para bovinos em pastejo no período das águas
    (Universidade Federal de Mato Grosso, 2021-02-24) Coutinho, Marina Pereira Souza; Cabral, Carlos Eduardo Avelino; 019.717.471-06; http://lattes.cnpq.br/6739111102181898; Cabral, Carla Heloisa Avelino; 718.096.431-04; http://lattes.cnpq.br/0254810575145100; Cabral, Carla Heloisa Avelino; 718.096.431-04; http://lattes.cnpq.br/0254810575145100; Souza, Alexandre Lima de; 816.861.706-10; http://lattes.cnpq.br/2182780077626286; Barros, Livia Vieira de; 073.193.606-08; http://lattes.cnpq.br/9490340357962289
    Two experiments with crossbred heifers (Nellore breed predominance) under grazing during the rainy season were carried out with the objective of evaluate the effect of monensin inclusion on protein and mineral supplements on productive performance, pasture consumption, dry matter intake and nutrient digestibility, as well as to identify changes in the ingestive behavior of heifers, thermal comfort and its relationship with ingestive behavior through the Index of thermal stress for cows (ITSC) in grazing. The experimental area consisted of 7 hectares of Brachiaria brizantha cv. Marandu under continuous stocking, located in Rondonópolis-MT. In both experiments, a 2x2 factorial scheme and a completely randomized design were adopted. The first experiment was carried out from December 2015 to March 2016. The treatments consisted of two protein supplements (high and low consumption) and the inclusion or not of monensin. Productive performance, nutrient consumption and digestibility were evaluated. Forty heifers with an average initial weight of 213.8 ± 4.5 kg were used. There was no difference (P>0.05) in the animals' performance among treatments, with an average daily gain of 0.588 kg animalday -1 . There was no interaction (P<0.05) between sodium monensin and supplements for consumption and digestibility variables, except for crude protein (CP) digestibility. There was equality in the dry matter (DM) intake among treatments (± 2% of the animals' body weight). However, there was a reduction (P<0.05) in pasture intake with the high consumption supplement, showing a substitutive effect. There was no treatments effect on the digestibility parameters (P> 0.05), but a greater CP digestibility (P<0.05) was observed when monensin was associated with low-consumption protein. It was concluded that monensin does not improve the performance of grazing heifers by consuming high and low consumption protein supplements, and its use is dispensable. The second experiment was carried out from December 2016 to March 2017. The treatments consisted of two supplements (mineral and protein) and the inclusion or not of monensin. Forty heifers with an average age and initial weight of 9 months and 159.2 ± 1.3 kg, respectively, were used. There was no interaction (P> 0.05) between the supplement type and monensin and there was no influence (P> 0.05) of the supplement type on the animals' performance. However, monensin promoted greater (P <0.05) weight gain of the animals (± 107 ganimal.day-1 ). There was an interaction (P <0.05) between supplementation and monensina inclusion on behavioral activities, except for idle time. There was equality in the average grazing time (455 minutes) of animals that received mineral supplement, regardless of the monensin inclusion. The monensin inclusion in the protein supplement reduced (P <0.05) the grazing time by 45 minutes. The ITSC value influenced (P <0.05) the ingestive behavior and the increase of this index reduced the grazing time in all treatments. Monensin improves the weight gain of animals grazing tropical forages under continuous stocking management.