Forage Intake by Grazing Livestock: A Review

Cordova, F. J.; Wallace, Joe D.; Pieper, Rex D.

doi:10.2307/3897201

Cited by 151 publications

(100 citation statements)

References 69 publications

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“…The dry matter intake estimated through an external indicator technique using purified and enriched lignin capsule was similar under the different grazing systems (Table 2). Cordova et al (1978) noted that evaluation of dry matter intake, when expressed as an absolute number, is not appropriate because of the difficulty in comparing experiments with variation in live weight among animals. Generally, an increase in consumption leads to an increase in live weight, suggesting that it is more convenient to express consumption as a function of live weight.…”

Section: Resultsmentioning

confidence: 99%

Dry matter intake, performance and carcass characteristics of hair sheep reared under different grazing systems

Santos

McManus

Peripolli

et al. 2017

Sci. agric. (Piracicaba, Braz.)

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The aim of this study was to evaluate the effect of three different grazing systems: isolated, alternate and simultaneous, on feed intake, performance and carcass characteristics of sheep. About 5.2 ha area of Tanzania grass (Panicum maximun Jacq cultivate Tanzania) was divided into 13 paddocks. This area was used as a stocking rate of two animal units (AU) per ha for 7 days' occupation and 21 days rest. A total number of 58 animals were used consisting of 12 heifers and 30 Santa Ines lambs with the addition of 16 adult ewes that were used to stabilize grazing pressure in the isolated system. The sheep were fed on 200 g per head per day of concentrate and cattle 2 kg per head per day. The parameters determined were the following:weekly weight (WW), total live weight gain (LWG) and mean daily weight gain (MDW). Also dry matter intake was estimated 84 days after the start of the experiment using external indicators (Purified and Enriched Lignin) in addition to carcass traits and composition which were also estimated. The result obtained for carcass composition revealed that the muscle:bone ratio and bone percentage were better in the alternate system. Moreover, the simultaneous and isolated systems showed higher lamb performance than the alternate system, while there was no effect on dry matter intake. Furthermore, there was no difference of the different systems on carcass traits and feed intake of sheep. Nevertheless, the simultaneous grazing system showed better sheep performance than the alternate grazing system.

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Section: Resultsmentioning

confidence: 99%

Dry matter intake, performance and carcass characteristics of hair sheep reared under different grazing systems

Santos

McManus

Peripolli

et al. 2017

Sci. agric. (Piracicaba, Braz.)

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show abstract

“…Cordova et al (1978) propose to estimate daily intake corresponding to the metabolic body weight (MBW is live weight 0.75 ); in this case, a MBW of 129 (650 0.75 ) was used for the chosen LSU. The daily intake varies between 18 and 41 g C day −1 MBW −1 (40 to 90 g DM day −1 MBW −1 ) which gives a range of the daily intake as 2300 to 5200 g C day −1 LSU −1 .…”

Section: Daily Grazing Without Mowing -Option G Dmentioning

confidence: 99%

Modeling vegetation and carbon dynamics of managed grasslands at the global scale with LPJmL 3.6

et al. 2018

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Abstract. Grassland management affects the carbon fluxes of one-third of the global land area and is thus an important factor for the global carbon budget. Nonetheless, this aspect has been largely neglected or underrepresented in global carbon cycle models. We investigate four harvesting schemes for the managed grassland implementation of the dynamic global vegetation model (DGVM) Lund-PotsdamJena managed Land (LPJmL) that facilitate a better representation of actual management systems globally. We describe the model implementation and analyze simulation results with respect to harvest, net primary productivity and soil carbon content and by evaluating them against reported grass yields in Europe. We demonstrate the importance of accounting for differences in grassland management by assessing potential livestock grazing densities as well as the impacts of grazing, grazing intensities and mowing systems on soil carbon stocks. Grazing leads to soil carbon losses in polar or arid regions even at moderate livestock densities ( < 0.4 livestock units per hectare -LSU ha −1 ) but not in temperate regions even at much higher densities (0.4 to 1.2 LSU ha −1 ). Applying LPJmL with the new grassland management options enables assessments of the global grassland production and its impact on the terrestrial biogeochemical cycles but requires a global data set on current grassland management.

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“…Método de indicadores: con este método se estimó la producción de heces (indicador externo) y la digestibilidad del alimento (indicador interno) (Cordova et al, 1978). Para estimar la producción de heces se utilizó el óxido de cromo, el cual fue suministrado a cada animal experimental.…”

Section: Consumo De Materia Seca De Forraje (Cmsf)unclassified

Consumo de materia seca en un sistema silvopastoril de Tithonia diversifolia en trópico alto

2017

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The aim of this study was to estimate the intake of dry matter forage (CMSf) by grazing holstein cows. The research was conducted in northern Antioquia highlands; a silvopastoral system with Tithonia diversifolia and Cenchrsus clandestinum (SSP) and a monoculture C. clandestinum were used. Were estimated the CMSf by different methodologies and kikuyu:wild sunflower consumption relation, also the interchangeability of two methodologies was determined. There were two conducted trials, in the first trail SSP was used without browsing of wild sun ower and monoculture; in the second trial the same system was applied, with the difference that for the SSP animals browsed the shrubby by themselves. Twelve random infant holstein cows were used in the two systems. CMSf was estimated by indicators (I), agronomic (A) and grazing behavior (C) methods, method I was the reference. In trial I more CMSf was observed in the SSP, with an average of 14.7 kg/day (p<0.05); trial II showed no difference in the CMSf, with an average of 13.3 kg/day (p>0.005). The kikuyu:wild sunflower consumption relation was 95:5. The correlation coefficient of concordance between the methods I and C near to 0 shown that they are not interchangeable. The results suggest that the SSP evaluated supplied sufficient forage to ensure optimal CMSf.

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Forage Intake by Grazing Livestock: A Review

Abstract: Pre\ent address for Dr. Cordova is Boulevard Jacarandas No. 33, lxtapan de la Sal, Xlex.. Mexico.Thi\ report is journal Unlk.. La5 Cruces.

Cited by 151 publications

References 69 publications

Dry matter intake, performance and carcass characteristics of hair sheep reared under different grazing systems

Dry matter intake, performance and carcass characteristics of hair sheep reared under different grazing systems

Modeling vegetation and carbon dynamics of managed grasslands at the global scale with LPJmL 3.6

Consumo de materia seca en un sistema silvopastoril de Tithonia diversifolia en trópico alto

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