Forage Intake and Ingestive Behavior of Cattle Grazing Old World Bluestems

Forbes, T. D. A.; Coleman, S. W.

doi:10.2134/agronj1993.00021962008500040006x

Cited by 40 publications

(31 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Because these bounds can alter ingestive the constraints and bounds within pastures again form. behavior across short time periods, they may be of suffi-In continuous stocking, or when animals regraze new cient scope to nullify the use of ingestive behavior compastures, carryover bounds can continue to operate at ponents to satisfactorily estimate daily forage intake some level along with the emerging bounds associated (Forbes and Coleman, 1993). To this extent, they warwith present grazing of new regrowth.…”

Section: Boundary Business and Ingestive Behaviormentioning

confidence: 99%

“…The elementary components of ingestive behavior op-ute and may be of sufficient size to prevent accurate prediction of daily DM intake based on ingestive behav-erate in all grazing situations. The quantitative relationships, both among animal species and among plant spe-ior measurement (Forbes and Coleman, 1993). For example, this type of variation may be the major contribu-cies and their interactions, however, are not universal, and many external factors influence short-term intake tor to the large overestimation in daily DM intake of steers grazing guineagrass reported by Brancio et al…”

Section: Boundary Business and Ingestive Behaviormentioning

confidence: 99%

See 1 more Smart Citation

Grazing Behavior of Ruminants and Daily Performance from Warm-Season Grasses

Burns

Sollenberger

2002

Crop Science

View full text Add to dashboard Cite

The various ingestive behavioral measurements have seldom been used to estimate long-term DM intake or to An estimate of the animal-production potential of pastures can be explain differences in intake on daily animal responses assessed by knowing the daily dry matter (DM) intake of the grazing animal and the digestibility of the DM consumed. The objective of among grazing management strategies in a production this paper is to examine the relationships between pasture canopy setting. This is also true relative to predicting daily anicharacteristics, ingestive behavior, and daily animal response from mal response. This need has been previously noted warm-season pastures. Of daily DM intake and digestibility of the (Hodgson, 1982a;Hodgson et al., 1994) and attributed, DM consumed, the former is the most variable and the most difficult in part, to a failure to see the role of ingestive behavior to determine. One approach to estimating daily DM intake has been measurements in production systems (Cosgrove, 1997). to use the components of ingestive behavior to determine a short-Several examples of the usefulness of grazing behavioral term intake rate (g min Ϫ1 ), which can be scaled using grazing time data were provided by Cosgrove (1997). One is the (min d Ϫ1 ) to give a 24-h DM intake (kg d Ϫ1 ). This approach has been importance of canopy height of ryegrass-based (Lolium used experimentally with some success, but has not found application perenne L.) pastures in maximizing daily forage intake in production settings. While aspects of ingestive behavior, including ingestive mastication, are common to all grazing ruminants, literature of the grazing animal and an understanding of why it indicates that differences occur among ruminant species and that is important. Another is the importance of leaf area animals ingest different pasture species differently. This results in index, green leaf mass, and associated stem height of plant-animal interactions. Frequently these dynamics are not clearly the canopy in understanding daily forage intake among addressed for cool-season and warm-season pastures in literature regrazing systems. views, which adds undue confusion to the general area. IngestiveThe general lack of application of grazing behavior behavior is discussed relative to animal-and pasture-generated bounds measurements to production systems is neither a critiwhich operate within paddocks and can greatly alter ingestive behavior cism of previous research nor of this general area of estimates. Also presented are relationships between diet particle size, research. It does beg, however, for the incorporation of associated with ingestive mastication, and steer daily gains.

show abstract

Section: Boundary Business and Ingestive Behaviormentioning

confidence: 99%

Section: Boundary Business and Ingestive Behaviormentioning

confidence: 99%

Grazing Behavior of Ruminants and Daily Performance from Warm-Season Grasses

Burns

Sollenberger

2002

Crop Science

View full text Add to dashboard Cite

show abstract

“…Green leakstem ratio was the single most important component determining forage intake of old world bluestems (Bothriochloa spp.) (Forbes and Coleman 1993 Resumen La relaci6n hoja:tallo en poblaciones de plantas forrajeras es un factor importante que afecta la selecci6n de la dieta calidad y consume del forraje. La determinacibn de la relaci6n hoja:tallo estP basada comirnmente en un proceso que demanda mucho trabajo manual para separar las fracciones de hojas y tallos.…”

Section: Introductionunclassified

Prediction of Leaf:Stem Ratio in Grasses Using near Infrared Reflectance Spectroscopy

Smart¹,

Schacht²,

Pedersen³

et al. 1998

Journal of Range Management

View full text Add to dashboard Cite

“…Caution should be exercised when extrapolating the observed differences in grazing resistance between pasture species to ruminant grazing behaviour in tropical pastures. First, although in this study, the grazing resistance concept incorporates species characteristics (of defined cultivars of a number of pasture grass species grown under a specific set of growing conditions and measured at a specific age) for plant part fracture force and plant part density, it does not incorporate plant characteristics associated with the availability and accessibility of forage, such as plant habit, the proportion of leaves, green herbage mass, leaf cluster size and the dimensions of plant parts, which have been shown to affect intake in tropical swards (Stobbs, ; Chacon et al ., ; Hacker, ; Burns et al ., ; Forbes and Coleman, ; Euclides et al ., ; Drescher, ). Nevertheless, the grazing resistance of a sward provides information about the mechanical resistance of a sward against defoliation and has been shown to affect bite dimensions in reproductive tropical swards (Benvenutti et al ., ).…”

Section: Discussionmentioning

confidence: 99%

Gradients in fracture force and grazing resistance across canopy layers in seven tropical grass species

Jacobs

Scheper

Benvenutti

et al. 2012

Grass and Forage Science

View full text Add to dashboard Cite

In reproductive swards, stems can act as a barrier that affects the grazing behaviour of ruminant livestock. The barrier effect of stems is closely associated with both the force required to fracture the stems and the density of these stems (in combination, these make up grazing resistance), and these factors need to be considered when making predictions about the forage intake of ruminants grazing reproductive pastures. Differences in grazing resistance between sward canopy layers of different grass species are thought to affect bite dimensions, but data are scarce. In this study, we assessed the grazing resistance for three canopy layers of seven tropical grass species. Species differed significantly in grazing resistance for every canopy layer, with a general ranking order for grazing resistance, in ascending order: Cenchrus ciliaris (‘American' buffel), Digitaria milanjiana (‘Jarra’ finger grass), Setaria surgens (annual pigeon grass), Setaria sphacelata (‘Narok’ setaria), Dichanthium sericeum (Queensland bluegrass), Chloris gayana (‘Callide’ Rhodes grass). In the top canopy layer, grazing resistance did not appear to create a barrier for any of the species, but in the bottom canopy layer, it did for all species. Species also differed in the relative contribution of fracture force and density to grazing resistance. The results highlight the importance of managing the grazing systems to minimize the barrier effect of the stems, which can be done by controlling the phenological stage of the pasture and the grass species and animal size used in the system.

show abstract

Forage Intake and Ingestive Behavior of Cattle Grazing Old World Bluestems

Cited by 40 publications

References 20 publications

Grazing Behavior of Ruminants and Daily Performance from Warm-Season Grasses

Grazing Behavior of Ruminants and Daily Performance from Warm-Season Grasses

Prediction of Leaf:Stem Ratio in Grasses Using near Infrared Reflectance Spectroscopy

Gradients in fracture force and grazing resistance across canopy layers in seven tropical grass species

Contact Info

Product

Resources

About