Valor nutritivo de gramíneas nativas do Rio Grande do Sul/Brasil, classificadas segundo uma tipologia funcional, sob queima e pastejo

Santos, André Bezerra dos; Quadros, Fernando Luíz Ferreira de; Rossi, Guilherme Ebling; Pereira, L. P. de; Kuinchtner, Bruno Castro; Carvalho, R. M. R. de

doi:10.1590/s0103-84782013000200025

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…The CP had a linear increase of 0.323 g/kg of DM, with 4.7% of DM in May and 7.4% of DM in the last month of the experiment, i.e., August. These values were within the range found by Santos et al (2013), which varied between 4.5% and 10.7% of DM among the studied species. Their study was carried out from September 2007 to May 2008, a period in which the native grassland had excellent yields.…”

Section: Resultssupporting

confidence: 89%

Mineral, Protein, and Energy Supplementation in Heifers in a Native Pampa Biome Pasture During Winter

Malaguez

Gonçalves

Giudice

et al. 2020

Rev. Agric. Neotrop.

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This study evaluated the effect of different supplements during winter on the performance of heifers in a native Pampa biome field using deferred grazing and evaluated the economic viability of each treatment. A total of 124 heifers from Brangus and Angus breeds, 18 months old, and with an average weight of 301.6 kg were included in this experiment. The treatments applied were: control with only native grassland, native grassland + 80P mineral salt treatment (MS), native grassland + protein salt treatment (PS), and native grassland + protein/energy salt treatment (PES). Besides the productive, botanical, and bromatological characteristics of the pasture, the average daily gain and the live weight gain per hectare were evaluated. The economic viability of the treatments was evaluated through partial budgeting. Weight loss was observed in all treatments. However, only the PES treatment differed from the others, with an average daily gain of -0.046 kg dia-1 (p value 0.005). The MS treatment was the best regarding economic viability. Despite that, the smallest weight loss was observed in the PES treatment, which may be a determinant in the development and future performance of heifers. Despite the small net margin, this treatment did not incur additional costs to the system.

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Section: Resultssupporting

confidence: 89%

Mineral, Protein, and Energy Supplementation in Heifers in a Native Pampa Biome Pasture During Winter

Malaguez

Gonçalves

Giudice

et al. 2020

Rev. Agric. Neotrop.

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show abstract

“…The CP contents (% dM) of A. lateralis (7.5%) were closed to those reported by Santos et al, (2013), 6.4%, in a study that assessed the nutritional value of the grasses of the pampa biome under grazing. Peripolli et al, (2011), who analyzed data compiled from digestibility experiments with different herbages, including natural grasslands, and found them a value of 7.8% CP.…”

Section: Effect Of the Chemical Composition Of The Pasture On Herbage Intakesupporting

confidence: 55%

Herbage intake by steers grazing in a natural grassland with predominance of Andropogon lateralis Nees managed under different canopy heights

et al. 2021

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The animal performance on pasture is directly correlated to canopy structure since this influences the herbage consumption. This study was evaluated the effects of four pre-grazing canopy heights (12, 20, 28 and 36 cm) of Andropogon lateralis Ness on herbage intake and feeding behavior of steers in a natural grassland under intermittent stocking management, using the same proportion of defoliation (40% reduction in pre-grazing height, i.e., post-grazing heights of 7.2, 12.0, 16.8 and 21.6 cm). The experiment was conducted on a total area of 14,000 m2, divided into sixteen paddocks of 875 m2. Thirty-two steers were used, divided into uniform pairs according to the live weight (LW) at the start of the experiment (244 ± 23.0 kg). Each paddock was subdivided into three plots of identical area; the first two plots were used for the adaptation period and the third for the assessment period. A randomized block design was used with four replicates and two assessment periods. Herbage mass and neutral detergent fiber content increased linearly (P < 0,001) with the increase of pre-grazing canopy heights. In contrast, was not affected by treatments, with mean values of 75 g/kg of dry matter (DM) in the upper stratum and 83 g/kg of DM in lower stratum. The herbage intake was similar between treatments (P = 0.255), averaging 1.78% LW. Grazing time increased linearly in the upper stratum and decreased linearly in the lower stratum with increasing pre-grazing canopy heights. Total time spent grazing, ruminating, and idling did not differ between treatments, with means of 52.6%, 23.0%, and 24.2%, respectively. Pre-grazing canopy heights treatments, based on the predominant species A. lateralis, did not affect the daily herbage intake of steers.

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“…The control of native species to introduce exotic species is generally done with fire or herbicide use, causing environmental damage [16]. Santos et al [17] argue that the reasons for using fire in rangelands are diverse. Fire is one of the practices that causes environmental damage to the soil and is rarely carried out in pastures with exotic cultures, showing that not even the crop treatment applies.…”

Section: Biodiversity In Ecosystems -Linking Structure and Functionmentioning

confidence: 99%

Shortage of Biodiversity in Grassland

Edvan¹,

Bezerra²,

Marques³

2015

Biodiversity in Ecosystems - Linking Structure and Function

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Valor nutritivo de gramíneas nativas do Rio Grande do Sul/Brasil, classificadas segundo uma tipologia funcional, sob queima e pastejo

Cited by 4 publications

References 13 publications

Mineral, Protein, and Energy Supplementation in Heifers in a Native Pampa Biome Pasture During Winter

Mineral, Protein, and Energy Supplementation in Heifers in a Native Pampa Biome Pasture During Winter

Herbage intake by steers grazing in a natural grassland with predominance of Andropogon lateralis Nees managed under different canopy heights

Shortage of Biodiversity in Grassland

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