Selective Grazing by Sheep as Shown by a Comparison of the Chemical Composition of Range and Pasture Forage Obtained by Hand Clipping and that Collected by Esophageal-Fistulated Sheep

Weir, W. C.; Torell, D. T.

doi:10.2527/jas1959.182641x

Cited by 66 publications

(19 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Grazing animals, however, select forages of higher nutrient quality than the average of that on offer [3,23,35,40]. A more accurate measure, therefore, of nutritional quality of forage on cleared and uncleared caatinga is the quality of the diet selected by the animal.…”

Section: Diet Qualitymentioning

confidence: 99%

Clearcutting Brazilian caatinga: assessment of a traditional forest grazing management practice

Kirmse¹,

Provenza

Malechek

1987

Agroforest Syst

View full text Add to dashboard Cite

Clearcutting is a common practice for removing woody vegetation in the semiarid tropics of northeast Brazil. The prevalent belief is that clearing increases carrying capacity for livestock by increasing herbaceous vegetation, yet iittle empirical evidence exists to support or refute the contention. We investigated the implications to small ruminant nutrition of clearcutting in the semiarid tropics of northeast Brazil. We found that biomass of herbaceous species increased sixfold following cutting of trees, but much of this increase was in the form of poorly palatable stem. The large supply of leaf litter from woody species that was typical of uncleared areas during the dry season was replaced by persistent green foliage on coppicing trees the year following clearing. This green foliage may enhance the nutritional quality of the diets of sheep and goats foraging on cleared areas during the dry season.

show abstract

Section: Diet Qualitymentioning

confidence: 99%

Clearcutting Brazilian caatinga: assessment of a traditional forest grazing management practice

Kirmse¹,

Provenza

Malechek

1987

Agroforest Syst

View full text Add to dashboard Cite

show abstract

“…As well, the large supply of available forage could have allowed the steers to increase their energy intake through selective grazing thus maintaining the observed level of performance, particularly during the early phase of the trial. Such selective grazing has been demonstrated using grazing ruminants with esophageal cannulas (Weir and Torell 1959;Ellis 1978).…”

Section: Animal Performancementioning

confidence: 99%

Effect of rumen degradable energy supplementation on forage utilization and performance of steers grazing stockpiled cool season perennial grass pastures

Añez-OsunaFederico

PennerGregory

LarsonKathy³

et al. 2015

Can. J. Anim. Sci.

View full text Add to dashboard Cite

. 2015. Effect of rumen degradable energy supplementation on forage utilization and performance of steers grazing stockpiled cool season perennial grass pastures. Can. J. Anim. Sci. 95: 255Á265. The objective of this study was to evaluate the effects of supplementing rumen degradable energy using blended by-product pellets that differed in starch and degradable fiber content on forage utilization and performance of steers grazing stockpiled cool-season perennial grass (CSPG) pastures. Forty-five yearling crossbred steers (334923.5 kg) stratified by body weight (BW) were randomly assigned to one of nine pastures (five steers/ pasture) of mature cool-season perennial grasses. Each pasture was randomly assigned (n 03) to one of three treatments: no supplement (CON); low-starch/high degradable-fibre (LSHF; 40.3% starch; 29.5% NDF) pellet and high-starch/lowdegradable fibre (HSLF; 48.6% starch; 22.8% NDF) pellet, both fed daily at 0.6% of BW (DM basis). The grazing period lasted 70 d (from early-August to mid-October). Over the 70-d study, forage CP decreased from 9.990.82 to 6.990.59% of DM and digestible energy content decreased from 2.690.04 to 2.290.04 Mcal kg(1 of DM. Treatment did not affect forage utilization (P00.50; 73.493.15%) or forage DM intake (P00.90; 9.091.54 kg d(1 ). Final BW and average daily gain (ADG) were not different (P0.05) between LSHF (43596.4 kg and 1.490.10 kg d(1 ) and HSLF (439910.4 kg and 1.590.14 kg d(1 ) treatments. However, supplemented steers had higher (PB0.05) final BW and ADG than the control steers (40295.6 kg and 1.090.09 kg d(1 ). These results show that unsupplemented beef steers grazing stockpiled CSPG pastures were limited in both energy and protein intake and that supplementation with by-product feed pellets formulated to supply protein and energy either as starch or degradable fibre equally improved animal performance.Key words: Stockpiled cool-season grass, by-products, starch, degradable fibre, grazing steers An˜ez-Osuna, F., Penner, G. B., Larson, K., Jefferson, P. G., Lardner, H. A. et McKinnon, J. J. 2015. Les effets des supple´ments d'e´nergie de´gradable dans le rumen sur l'utilisation des fourrages et la performance des baeufs broutant les paˆturages d'herbes vivaces de saison fraıˆche laisse´es sur pied. Can. J. Anim. Sci. 95: 255Á265. L'objectif de cette e´tude e´tait d'e´valuer les effets de supple´ments d'e´nergie de´gradable dans le rumen au moyen de granule´s de produits de´rive´s me´lange´s qui diffe´raient en teneur d'amidon et en fibres de´gradables sur l'utilisation des fourrages et la performance des baeufs broutant dans les paˆturages d'herbes vivaces de saison fraıˆche (CSPG -« cool-season perennial grass ») laisse´es sur pied. Quarante-cinq bovins croise´s d'un an (334923,5 kg) stratifie´s selon le poids corporel (BW Á « body weight ») ont e´te´assigne´s ale´atoirement a`1 de 9 paˆturages (5 bovins/paˆturage) de CSPG matures. Chaque paˆturage a e´te´assigne´ale´atoirement (n03) a`l'un de 3 traitements : sans supple´ment (CON) ; granule´s a`faible ten...

show abstract

“…This could be attributed to one or all of three mechanisms: (i) legumes and weeds were grazed selectively (Weir & TorreIl 1959,;Hunter 1962;Brougham 1966) so that few plants matured and Iittle senescent material formed; (ii) within each regrowth period much less senescent material was naturally produced by legumes and weeds than by grasses; (iii) legumes (D. F. Charlton, pers. comm.…”

Section: Discussionmentioning

confidence: 99%

Phosphorus uptake and return in grazed, steep hill pastures

Gillingham

1980

New Zealand Journal of Agricultural Research

View full text Add to dashboard Cite

Ministry 01' Agriculture and Fisheries, P.ß., Hamilton, New Zealand Pasture production and dung and Iitter accumulation weremeasured on a range 01' slopes on both a north-facing and a south-facing steep hili paddock for I year. All parameters decreased in the following order: campsites, 2SO slopes, 4SO slopes. Pasture production and dung accumulation declined sharply with increase in surface slope. In particular dung accumulation ranged from very high on campsites to negligible on 45°slopes. The accumulation of pasture litter was more uniform although greater on north-aspect than on south-aspect slopes. There was no significant difference between aspects in the mean annuallevel 01' other parameters measured on similar slopes. Pasture species and litter composition varied between campsites and slopes and also with season and aspect. Although legurnes and weeds together at times comprised an appreciable proportion 01' total pasture production on slopes, these species made a negligible contribution to pasture litter. Uprooted grass plants forrned a significant portion 01' pasture litter, particularly on slopes.

show abstract

Selective Grazing by Sheep as Shown by a Comparison of the Chemical Composition of Range and Pasture Forage Obtained by Hand Clipping and that Collected by Esophageal-Fistulated Sheep

Cited by 66 publications

References 0 publications

Clearcutting Brazilian caatinga: assessment of a traditional forest grazing management practice

Clearcutting Brazilian caatinga: assessment of a traditional forest grazing management practice

Effect of rumen degradable energy supplementation on forage utilization and performance of steers grazing stockpiled cool season perennial grass pastures

Phosphorus uptake and return in grazed, steep hill pastures

Contact Info

Product

Resources

About