Recovered energy and efficiency of digestion in sheep and goats fed Atriplex nummularia compared to alfalfa hay

Askar, Ahmed; Nassar, M. S.; Badawy, H.S.; Eid, E.; Guada, J.A.; Farid, M. F. A.

doi:10.1016/j.livsci.2016.10.009

Cited by 18 publications

(16 citation statements)

References 22 publications

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“…However, Attia-Ismail (2016a) compiled a Table 1 to show that halophytes and traditional forages have similar energy contents. Also, Askar et al (2016) found that alfalfa hay and Atriplex nummularia had similar gross energy content (15.9 and 16.3 MJ/kg DM intake).…”

Section: Energy Intakementioning

confidence: 82%

“…Drinking fresh water caused higher feed conversion efficiencies (Table 3) than did salty water of 12494 TDS (Attia-Ismail 2003). Askar et al (2016) found that the efficiency of energy utilization (Table 4) was low for A. nummularia compared to alfalfa (digestibility coefficients were 46.0 and 66.3, respectively). These authors found that energy expenditures (EE) of these animals were 679 and 238 kJ/kg BW 0.75 /day when fed alfalfa hay and Atriplex, respectively.…”

Section: Feasibility Of Energy Utilization Of Halophytesmentioning

confidence: 97%

“…Type of animals is an important factor that causes variations in EE of halophytes. Goats showed higher efficiency of energy utilization expressed as energy expenditure when fed A. nummularia (Askar et al 2016) or A. saligna (El-Meccawi et al 2008). The later author showed that retained energy values for goats and sheep that consumed alfalfa hay were almost similar, but when A. saligna was the sole diet, goats utilized energy with higher efficiently than sheep (À128 vs. À243 kJ/kg BW 0.75 /day for retained energy, respectively).…”

Section: Feasibility Of Energy Utilization Of Halophytesmentioning

confidence: 97%

“…Recovered energy by animals fed alfalfa hay or Atriplex nummularia (ad libitum ) as a sole diet(Askar et al 2016) …”

mentioning

confidence: 99%

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Nutrient Feasibility of Halophytic Feed Plants

Attia-Ismail¹

2020

Handbook of Halophytes

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This chapter reviews the feasibility of feeding halophytic main nutrients, i.e., energy and proteins. Halophytes may contain amounts of energy comparable to those of traditional forages. Yet, the efficiency by which the energy contents of halophytes are utilized is very much low. Therefore, halophyte-included diets of animals require energy supplementation. The high salt in halophytes causes the energy elements not to be utilized efficiently. The determination of energy contents of halophytes is complicated by the presence of high percentage of salt.

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Section: Energy Intakementioning

confidence: 82%

Section: Feasibility Of Energy Utilization Of Halophytesmentioning

confidence: 97%

Section: Feasibility Of Energy Utilization Of Halophytesmentioning

confidence: 97%

“…Recovered energy by animals fed alfalfa hay or Atriplex nummularia (ad libitum ) as a sole diet(Askar et al 2016) …”

mentioning

confidence: 99%

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Nutrient Feasibility of Halophytic Feed Plants

Attia-Ismail¹

2020

Handbook of Halophytes

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“…It has been recognized that digestion of nutrients differs between ruminant species depending on forage quality (Soto-Navarro et al, 2014). Several studies have reported that sheep and goats fed with high quality forage present an apparently similar digestibility of nutrients (Carro et al, 2012;Askar et al, 2016). Other studies have shown that goats vs. sheep are more efficient at digesting nutrients when fed forage composed of a low CP and high fiber content, which is typical of tropical conditions (Domingue et al, 1991b;Askar et al, 2016).…”

Section: Digestibility Performance Carcass Characteristics and Micmentioning

confidence: 99%

A comparative study on the excretion of urinary metabolites in goats and sheep to evaluate spot sampling applied to protein nutrition trials

Santos

Carvalho

et al. 2018

Journal of Animal Science

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The main objective of this study was to establish a protocol to validate urine spot samples to estimate N excretion and microbial synthesis in goat and sheep; and to study factors that affect daily creatinine and purine derivatives (PD) urinary excretion. Also a performance trial was carried out to compare goat and sheep slaughtered after different feedlot periods. Twelve Boer goats (20.6 kg ± 3.4 initial BW) and 12 Dorper sheep (18.4 kg ± 2.3 initial BW), all 4-mo-old, males, were used. Eight animals (4 goats and 4 sheep) were randomly allocated to be slaughtered at 28, 56, and 84 d in feedlot. The experiment was conducted in a completely randomized design in a 2 × 3 factorial scheme, in which the factors were both species and the 3 feedlot periods. Diet consisted of 50% sorghum silage and 50% concentrate on a DM basis. Nutrient intake was higher (P < 0.01) for sheep than goats. Apparent digestibility of nutrients was similar (P > 0.05) in both species. Sheep had greater (P < 0.01) ADG and final BW than goats. Fat deposition and fat:muscle ratio was higher (P < 0.01) in sheep carcasses. Sheep had higher N urinary (P = 0.02) excretion and N retention (g/d; P < 0.01) than goats. Urinary N excretion increased linearly (P < 0.01) in response to feedlot period. However, feedlot did not affect (P = 0.20) N retention, but linearly reduced the relationship between N retained and ingested (P = 0.04) or apparently digested (P < 0.01). Microbial efficiency (P > 0.05) did not differ between species. Creatinine excretion (C mg/d; P < 0.01) was higher in sheep than goats. Purine derivatives (Ŷ) were related closely with OM intake (Ŷ = 0.013±0.0007X; r2 = 94). A difference (P < 0.01) was found between the allometric model for creatinine excretion (Ŷ) and muscle weight (X) for both species, and the following equations were obtained: Ŷ = 89.04(±31.44)X0.9797(±0.16) for goats and Ŷ = 109.8(±47.50)X0.8002(±0.20) for sheep. Creatinine concentration was greater during nocturnal than diurnal periods, with lower diurnal fluctuations. Sampling time did not affect (P = 0.27) the PD:C ratio. The urea (U):C ratio was higher (P < 0.01) in sheep than goats, and was also higher (P < 0.01) during diurnal than nocturnal sampling periods. Our results suggest that it is necessary to take 2 and 3 spot urine samples after feeding to estimate N compounds excretions in goats and sheep, respectively.

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Nutrient Feasibility of Halophytic Feed Plants

Attia-Ismail¹

2021

Handbook of Halophytes

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Recovered energy and efficiency of digestion in sheep and goats fed Atriplex nummularia compared to alfalfa hay

Cited by 18 publications

References 22 publications

Nutrient Feasibility of Halophytic Feed Plants

Nutrient Feasibility of Halophytic Feed Plants

A comparative study on the excretion of urinary metabolites in goats and sheep to evaluate spot sampling applied to protein nutrition trials

Nutrient Feasibility of Halophytic Feed Plants

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