Nutritional evaluation and productivity of supplemented sheep grazing in semiarid rangeland of northeastern Brazil

Araújo, A. R.; Rodríguez, N. M.; Rogério, Marcos Cláudio Pinheiro; Borges, I.; Saliba, Eloísa de Oliveira Simões; Santos, S. A.; Pompeu, Roberto Cláudio Fernandes Franco; Fernandes, Francisco; Monteiro, J. P.; Muir, James P.

doi:10.1007/s11250-018-1781-6

Cited by 13 publications

(8 citation statements)

References 16 publications

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“…The IVDMD of the selected forage, composed mainly of leaves, stems and leaf litter, during the dry season, was less than 0.50 kg/kg forage DM, likely because of high C fraction content. This result is compatible with the one obtained in the Caatinga do Semi-arid area in the dry season by Araújo et al (2019), 0.43 kg/kg forage DM, which indicates high forage lignification and unavailability of N, with a negative impact on IVDMD. Thus, strategies for the maintenance and production of herds under these conditions can be recommended, with the adoption of supplementation alternatives with an emphasis on the potential availability of protein and energy for the rumen microbiota.…”

Section: Carbohydrate and Nitrogen Fractions Of Caatinga Plants Selected By Ewessupporting

confidence: 91%

“…Concentrate supplementation is an important driver of ruminant selection for CP and fiber in pasture herbage. In general, as supplement increases, ruminants select for less CP and more fiber while unsupplemented animals in the absence of concentrate supplement select pasture herbage diets with more CP and less fiber than is present on average in available herbage (Araújo et al, 2019).…”

Section: Chemical Composition Of Selected Dietmentioning

confidence: 99%

“…The fecal microhistological technique (Sparks and Malechek, 1968) is a viable methodology for determining the diet of animals in the Caatinga (Araújo et al, 2019), as it is less laborious and less invasive, although it presents some inaccuracies when sampling, due to the interaction of factors involved in grazing by animals in the Caatinga environment (Rogério et al, 2017). We hypothesize that the selectivity of Caatinga pasture species by sheep, as a function of the meteorological conditions of the environment, can be determined by the microhistological technique and reveal the impact of the animal-plant interaction on the nutritional value related to the chemical constituents of the forage and to provide information to Caatinga sheep producers, and comparable systems around the world, to be used for rangeland vegetation management.…”

Section: Introductionmentioning

confidence: 99%

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Effect of concentrate supplement to ewes on nutritive value of ingested Caatinga native forage nutritive value as affected by season

Carvalho

Alves

Pompeu

et al. 2021

Trop Anim Health Prod

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The objective of this study was to identify by microhistological technique the reference chemical components for use as indicators of the nutritive value of Caatinga plants forage grazed by sheep throughout the year. A flock of twenty mixed-race meat ewes, multiparous, in production, with an average 34.84 ± 1.75 kg live weight and 36 months of age was assigned to supplement treatment of 0, 200, 350, and 500 g concentrate/head/day for 3 years. The experiment was designed as a randomized complete design with repeated measures over time. Supplementation with concentrate did not influence chemical composition of selected forage. In contrast, season heavily influenced diet chemical composition. Canopy stratum, season, and plant botanical family of selected species affected forage chemical composition selected by ewes. The ewes selected forage with greater nutritive value during the rainy season. Based on principal component analysis of the nutritive value of the primary forage species selected, ewes preferentially grazed plants contained greater neutral detergent fiber, acid detergent fiber, crude protein (CP), C fraction of nitrogenous compounds, and carbohydrate fractions A + B1 and C compared to the average native Caatinga herbage. Rangeland botanical composition and ewe diet varied during the year, affecting forage nutrients on offer, with the best diet selected during the rainy season because of the presence of dicotyledonous herbaceous species rich in CP as well as soluble carbohydrates and nitrogenous compounds. Concentrate supplement strategies for ewes on rangelands, such as Caatinga, should be determined by herbaceous species nutritive value during the rainy season and deep-rooted perennial dicotyledons during the dry season. These include the need to monitor ewe selection of forage species and their nutritive value, which is effectively accomplished with fecal microhistological techniques.

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Section: Carbohydrate and Nitrogen Fractions Of Caatinga Plants Selected By Ewessupporting

confidence: 91%

Section: Chemical Composition Of Selected Dietmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of concentrate supplement to ewes on nutritive value of ingested Caatinga native forage nutritive value as affected by season

Carvalho

Alves

Pompeu

et al. 2021

Trop Anim Health Prod

Self Cite

View full text Add to dashboard Cite

show abstract

“…In general, this hypothesis is confirmed by the low stocking rate used by the farmers in response to the low forage production of native pasture, mainly in the dry period. The increase in the availability and nutritional value of the Caatinga pasture would be possible through practices such as replenishment of soil nutrients (Costa, Almeida, Pimenta Filho, Holanda, Santos 2008), manipulation of woody vegetation, rearing and thinning of trees and shrubs, and enrichment of the herbaceous stratum (Batista and de Souza, 2015;Araújo et al 2019).…”

Section: Livestock Indicatormentioning

confidence: 99%

Typification, characterization, and differentiation of sheep production systems in the Brazilian semiarid region

Silveira

Vasconcelos

Silva

et al. 2021

NJAS: Impact in Agricultural and Life Sciences

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The complexity of livestock production systems implies the interrelation of physical, technical, social, environmental, and animal factors. This study aimed (i) to classify and characterize farms in representative typologies and (ii) to point out the main factors responsible for the differences between the sheep farm typologies in Brazilian semiarid region. A structured questionnaire with 29 variables related to social, physical, livestock, technological, herd management, and productive indicators was applied to 65 sheep farmers. The farms typology was classified, characterized, and differentiated using several techniques of multivariate analysis. Three sheep production systems were identified: Emerging (16 farms): young adults farmers, medium farms and herds, intensive management, intermediate technological level, and high meat production; Conventional (40 farms): adult farmers, smallholder farms, small herds, low technological level, and low meat production; and traditional (09 farms): mature farmers, large farms and herds, extensive management, low technological level, and high meat production. Social, physical, livestock, herd management, technological, and productive factors showed discriminatory power (P < 0.05) to differentiate typologies. The family-based productive system still represents the primary sheep production system. Sheep farming in the Brazilian semiarid region is characterized as extensive, heavily dependent on natural resources, and susceptible to seasonal variations. Some common characteristics among the farms studied were the use of family labour and the predominance of extensive breeding with low stocking density. The emerging system is expanding and may represent the future of sheep farms. It is believed that the traditional system can intensify its management and migrate to the emerging system in the future. It is recommended to direct public policies that encourage the efficient succession of workers in sheep farming, adoption of technologies,

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“…Once these contents are achieved, sheep are considered Cu deprivation. Cu content in liver below 75 mg/kg is considered deprivation for the Tibetan sheep [15,16]. Therefore, the Tibetan sheep in current studies had been considered Cu deprivation when they initially entered the experiment, because initial Cu contents in liver in the tested sheep were 73.26±6.17 mg/kg.…”

Section: Influences Of S Fertilization On Mineral Contents In Animal Tissuesmentioning

confidence: 99%

Effects of Sulphur Fertilizer on Copper Metabolism in Grazing Tibetan Sheep in Fertilized Pasture

Zhai¹,

Zhao²,

Shen³

2021

Pol. J. Environ. Stud.

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To explore the impact of sulfur (S) fertilization on copper (Cu) metabolism in grazing Tibetan sheep, fertilizing and grazing experiments were conducted in the Southwest Grand Grassland, China. The tested pasture was randomly divided into four parts by the fencing device (2 hm 2 /part). The pasture received ammonium sulfate [(NH 4 ) 2 SO 4 ] treatment in summer in 2020 (0, 300, 400, and 500 kg/hm 2 for part I, part II, part III, and part IV, respectively). 24 Tibetan sheep (one year old) were randomly divided into four groups, and assigned to the selected pastures (part I, part II, part III, and part IV for group I, group II, group III, and group IV, respectively). The grazing experiments lasted for 90 days. The results showed that the contents of nitrogen (N) and S in fertilized forage were markedly higher than those in unfertilized grass (P<0.01), but there was no significant difference among fertilized forages. The contents of Cu in blood and liver in the Tibetan sheep from fertilized pasture were extremely lower than those in animals from unfertilized pasture (P<0.01). The contents of Hb and PCV in the tested sheep from fertilized pasture were extremely higher than those in sheep from unfertilized pasture. The activities of serum SOD, GSH-Px, T-AOC, Cp, and CAT in sheep from fertilized pasture were extremely lower than those in sheep from no fertilized pasture (P<0.01), but there were no obvious differences among the Tibetan sheep from fertilized pasture (P>0.05). The contents of MDA in the Tibetan sheep from fertilized pasture were significantly higher than those in animals from no fertilized pasture (P<0.01). There was no obvious difference among the Tibetan sheep from fertilized pasture (P>0.05). Therefore, (NH 4 ) 2 SO 4 fertilization not only greatly influenced the contents of S and N

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Nutritional evaluation and productivity of supplemented sheep grazing in semiarid rangeland of northeastern Brazil

Cited by 13 publications

References 16 publications

Effect of concentrate supplement to ewes on nutritive value of ingested Caatinga native forage nutritive value as affected by season

Effect of concentrate supplement to ewes on nutritive value of ingested Caatinga native forage nutritive value as affected by season

Typification, characterization, and differentiation of sheep production systems in the Brazilian semiarid region

Effects of Sulphur Fertilizer on Copper Metabolism in Grazing Tibetan Sheep in Fertilized Pasture

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