Parâmetros nutricionais da pastagem natural em diferentes tipos de solos na APA do Ibirapuitã, Rio Grande do Sul - Brasil

Silveira, Vicente Celestino Pires; Velho, João Pedro; Vargas, Adriana; Genro, T. C. M.; Haygert-Velho, Ione Maria Pereira

doi:10.1590/s0103-84782006000600036

Cited by 4 publications

(4 citation statements)

References 12 publications

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“…The NDF is an important parameter to be measured due to its high levels in plants, which limit forage intake due to rumen fill (Silveira, Velho, Vargas, Genro, & Velho, 2006). This result, along with that of CP, helps in decision making about the ideal regrowth interval of forage plants based on grass quality instead of biomass accumulation.…”

Section: Resultsmentioning

confidence: 99%

Production and quality of tropical grasses at different regrowth intervals in the Brazilian semiarid

Pereira

Neto

Difante

et al. 2021

Acta Sci. Anim. Sci.

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The objective of this study was to evaluate the production and chemical composition of three forage species at different regrowth intervals. A 3 x 4 randomized-block factorial design with three forage species (Andropogon, Buffel, and Massai) and four regrowth intervals (21, 35, 49, and 63 days) was used. There was no interaction (p > 0.05) between forage species and regrowth interval on any of the chemical components evaluated. The crude protein content decreased but the contents of neutral detergent fiber, acid detergent fiber and hemicellulose increased with increasing regrowth interval (p > 0.05). Only the contents of crude protein and ether extract were similar (p > 0.05) among grasses. A significant interaction was observed (p < 0.05) between forage species and regrowth interval on forage mass. Andropogon grass had the highest forage mass at 63 days (3,270.1 kg ha-1 DM cut-1) and the highest productivity regardless of the regrowth interval (19.1 t ha-1 DM year-1). Therefore, Andropogon grass was the most productive forage among the tested species. Pastures should be managed with shorter growth intervals due to the highest crude protein level and the lowest contents of neutral detergent fiber and acid detergent fiber.

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Section: Resultsmentioning

confidence: 99%

Production and quality of tropical grasses at different regrowth intervals in the Brazilian semiarid

Pereira

Neto

Difante

et al. 2021

Acta Sci. Anim. Sci.

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“…Promoting the sustainability of economic activities in protected areas should be a fundamental principle for decisionmakers at local and regional levels for farmers (Viana et al, 2021a;Miguel et al, 2017). Thus, developing representative public policies (Viana et al, 2021b;Silveira et al, 2006) for the EPA territory is the main primaryer native for promoting economic growth together with environmental preservation (Viana et al, 2021b;Silveira et al, 2006;Nascimento et al, 2020). These policies should provide incentives that stimulate the sustainable use of natural resources, encourage social awareness, and guide the conservation of ecosystem services in agricultural exploitation.…”

Section: Soymentioning

confidence: 99%

Change in land use and economic dynamics of the Ibirapuitã River Environmental Protection Area of the Brazilian Pampa biome

Rhoden

Viana

Silveira

2022

Semina: Ciênc. Agrár.

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This study analyzed the change in land use in the Environmental Protection Area (EPA) of the Ibirapuitã River in the Pampa biome, Brazil, and its impact on the economic dynamics of the region. The analysis had a descriptive character with a quantitative approach. Methodologically, we constructed a database with macroeconomic and agricultural production variables of the four municipalities that compose the EPA Territory, including remote sensing images to assess the change in land use between 2000 and 2020. Moreover, regression models were used to determine the growth trends in agricultural production and analyze the impact of land-use change on the economic dynamics of the territory. The results indicated a shift in land use in the EPA territorry, resulting from transforming natural pastures into grain cropping systems. Profitability-based production is one of the main factors for change in land use. The expansion of soybean production positively impacted the economic variables of the territory. However, this EPA of the Ibirapuitã was essential to ensure conservation use of the region during this period, maintaining the areas of natural pasture in the biome. Therefore, it is necessary to develop a representative public policy for the Pampa biome that offers incentives and encourages the conservation of ecosystem services in agricultural exploitation.

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“…Heifers at the end of 24 months entered the cowherd. The native and sown pasture produces 4,100 kg per hectare and 6,770 kg per hectare of dry matter and 11.4% and 20.1% of crude protein, respectively, per season (Conterato, David, Trindade, Maldaner, & Bremm, 2016;Ferreira et al, 2011;Marchesan et al, 2015;Silveira, Velho, Vargas, Genro, & Velho, 2006). The calves and the bulls were provided supplemental feed at 1.16% of their live weight (LW) per day.…”

Section: Revenue and Costs Componentsmentioning

confidence: 99%

Breeding objectives of Brangus cattle in Brazil

Simões

Leal

Minho

et al. 2019

J Animal Breeding Genetics

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Our goal was to define a breeding objective for Brangus beef cattle in Brazil. Bioeconomic models were produced and used to estimate economic values (EVs). The scenarios simulated were typical full‐cycle beef production systems that are used in tropical and subtropical regions. The breeding objective contained pregnancy rate (PR), warm carcass weight (WCW), mature cow weight (MCW), number of nematode eggs per gram of faeces (EPG) and tick count (TICK). Two models were used in series to estimate the EV. A deterministic model was used to simulate effects of PR, WCW and MCW on profitability with a constant parasite load. Subsequently, stochastic models were used to estimate economic values for TICK and EPG as consequences of their environmental effects on weight gains, mortality and health costs. The EV of PR, WCW, MCW, EPG and TICK, was US$1.59, US$2.11, −US$0.24, −US$5.35 and −US$20.88, respectively. Results indicate positive emphasis should be placed on PR (12.49%) and WCW (65.07%) with negative emphasis on MCW (13.92%), EPG (2.77%) and TICK (5.75%). In comparison with the indexes usually used, these results suggest a reformulation in the selection indexes of the beef production system in tropical and subtropical regions in order to obtain greater profitability.

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Parâmetros nutricionais da pastagem natural em diferentes tipos de solos na APA do Ibirapuitã, Rio Grande do Sul - Brasil

Cited by 4 publications

References 12 publications

Production and quality of tropical grasses at different regrowth intervals in the Brazilian semiarid

Production and quality of tropical grasses at different regrowth intervals in the Brazilian semiarid

Change in land use and economic dynamics of the Ibirapuitã River Environmental Protection Area of the Brazilian Pampa biome

Breeding objectives of Brangus cattle in Brazil

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