Morphological and structural characteristics of &lt;i&gt;Urochloa decumbens&lt;/i&gt; Stapf. deferred pasture grazed by heifers under two periods of protein-energy supplementation

Silva, Pedro Henrique Ferreira da; Carvalho, Carlos Augusto Brandão de; Malafaia, Pedro; Garcia, Felipe Z.; Barbero, Rondineli Pavezzi; Ferreira, Robson Leandro

doi:10.4025/actascianimsci.v41i1.44425

Cited by 4 publications

(4 citation statements)

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“…It is important to highlight that up to 33 days of fallowing, the final weight was not altered, most likely due to the high forage supply that exceeded the minimum of 3.5 times the necessary (33) , allowing the animals to express all their ability to select species more palatable and of better nutritional value (34) . Results similar to those observed in the study were reported by Santos et al (28) , who evaluated the effect of supplementation in Santa Inês lambs finished on native pasture, and found a final body weight of 23.63 kg in animals receiving 1% supplementation, and by Silva et al (29) , who studied Urochloa decumbens and reported a forage reduction in the dry season, with seasonality in animal production and animal weight in the last evaluation period. Santos et al (7) argued that the fallowing leads to the accumulation of mature stems and dead material and a decrease in the availability of leaves, with a consequent reduction in animal consumption and performance.…”

Section: Resultssupporting

confidence: 89%

Forage availability and weight gain of goats on caatinga enriched with Urochloa trichopus (Hochst.) Stapf subjected to fallowing and fertilized with phosphate

et al. 2022

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The objective of this study was to evaluate the forage availability and performance of goats in thinned Caatinga enriched with Urochloa trichopus subjected to grazing fallowing and levels of phosphorus fertilization. Twenty-four F1 crossbred goats (Boer x Non-descript breed), whole, 15.0 ± 2.6 kg body weight were distributed in four paddocks (n = 6) according to body weight, age and physiological status. Animals grazed on Caatinga, under continuous stocking, and were gathered and kept in individual pens overnight. The experiment to evaluate animal performance was a randomized block design with 4 treatments (0, 11, 33 and 60 days of fallowing) and six replications. To determine dry mass production and floristic composition, phosphate fertilization was used in the doses of x P2O5 in a randomized block design with five treatments, 0, 30, 60, 90 and 120 kg P2O5 with 4 replications. Phosphate fertilization had an effect on the floristic composition of dicots and U. trichopus (P<0.05). There was an effect of pasture fallowing on the final weight of goats, with the lowest weight (20.40 kg) observed after 60 days of fallowing (P<0.05). Fallowing is not suitable for an area of vegetation in the caatinga, because there was a decrease in forage availability and quality in the dry period, resulting in a lower performance of animals.

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Section: Resultssupporting

confidence: 89%

Forage availability and weight gain of goats on caatinga enriched with Urochloa trichopus (Hochst.) Stapf subjected to fallowing and fertilized with phosphate

et al. 2022

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“…There was no significant effect on CP content, which on average were lower than the critical level of the basal ruminant diet (Silva et al, 2019). Importantly, these results reflect the CP levels of elephant grass before ensiling (Table 1).…”

Section: Resultsmentioning

confidence: 66%

Nutritional value, fermentation losses and aerobic stability of elephant grass (Pennisetum purpureum Schum.) silage treated with exogenous fibrolytic enzymes

Lemos

Andrade²,

Silva

et al. 2020

Acta Sci. Anim. Sci.

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The aim of this study was to evaluate nutritional value, fermentation losses, and aerobic stability of elephant grass silage (Pennisetum purpureum Schum.) treated with exogenous fibrolytic enzymes. The experiment was conducted in a completely randomized design with four replicates (experimental silos) and five levels of fibrolytic enzymes (0, 1.5, 3.0, 4.5 and 6.0%). For this, the elephant grass was ensiled at 70 days of age in plastic buckets with 20L capacity. Silos were opened 60 days after sealing. Analyses were made for chemical composition, in vitro dry matter digestibility (IVDMD), effluent losses (EL), gas losses (GL) and dry matter recovery (DMR), as well as the aerobic stability of the silage. Data were analyzed with PROC REG of SAS® University, at 5% probability. There was an increase in IVDMD content (p < 0.0001) and reduction in NDF and ADF contents (p < 0.0001) according to enzyme levels. These results were related to the increase in the degradation of fiber fractions. There were higher EL (p = 0.0062) as a function of enzyme levels and aerobic deterioration after silo opening, at all levels tested. Thus, it can be concluded that the exogenous fibrolytic enzymes change the chemical composition of elephant grass silage, and increase its digestibility and nutritional value. Moreover, when used alone as an additive, fibrolytic enzymes are not able to recover all dry matter of this silage (with effluent and gas losses), and are not able to maintain aerobic stability in the first hours after opening the silos.

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“…The lack of this technique becomes a limiting factor, stagnating this index at 0.80. Stockpiling is efficient to mitigate the seasonality effect of forage production and is technically efficient when considering the regrowth period and the grazing intensity of forage species (Silva et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Feed technologies and efficiency in cow-calf systems

Rosa¹,

Zago²,

Oliveira³

et al. 2022

Revista Brasileira De Zootecnia

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Animal production systems and agribusinessFull-length research article Feed technologies and efficiency in cow-calf systemsABSTRACT -This study was performed to evaluate the efficiency index of cow-calf systems, based on different feed technologies commonly employed in the Rio Grande do Sul state, southern Brazil. Hence, the efficiency of 35 cow-calf herds was evaluated by Data Envelopment Analysis (DEA). Data was collected by online survey and in-depth interviews, as well as data registers from the cow-calf systems, located in 31 municipalities. The analyzed indicators included rates of mortality, pregnancy, birth, and productivity. The feed technologies evaluated were the use of cultivated pastures during winter and summer, supplementation during winter and summer, creep feeding, deferral of natural pasture, use of grazing systems, and employee's capacitation. Approximately 80% of the evaluated farms showed low-to-medium Efficiency Index (EI; up to 0.79 in a scale of 0 to 1), 13% presented high EI, and only 7% had very high EI (above 0.95). The use of cultivated pastures with the inclusion of protein supplementation and employees' capacitation were highlighted as the main practices to increase efficiency of cow-calf systems in Rio Grande do Sul. The technologies identified as most impactful raise the EI of production systems from low to medium. Our results assist in decision-making in the use of feed technologies, pointing out a direction for the use of technologies that make breeding systems more efficient from a productive point of view.

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Morphological and structural characteristics of <i>Urochloa decumbens</i> Stapf. deferred pasture grazed by heifers under two periods of protein-energy supplementation

Cited by 4 publications

References 2 publications

Forage availability and weight gain of goats on caatinga enriched with Urochloa trichopus (Hochst.) Stapf subjected to fallowing and fertilized with phosphate

Forage availability and weight gain of goats on caatinga enriched with Urochloa trichopus (Hochst.) Stapf subjected to fallowing and fertilized with phosphate

Nutritional value, fermentation losses and aerobic stability of elephant grass (Pennisetum purpureum Schum.) silage treated with exogenous fibrolytic enzymes

Feed technologies and efficiency in cow-calf systems

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