A simulation model of forage yield, quality and intake and growth of growing cattle grazing cornstalks.

@article{FernndezRivera1989ASM,
  title={A simulation model of forage yield, quality and intake and growth of growing cattle grazing cornstalks.},
  author={Salvador Fern{\'a}ndez-Rivera and M. Lewis and Terry James Klopfenstein and Thomas L. Thompson},
  journal={Journal of animal science},
  year={1989},
  volume={67 2},
  pages={
          581-9
        }
}
A simulation model was developed to predict corn crop residue yield and quality and intake and performance of growing cattle grazing cornstalks. The model is wholly deterministic and integrates the effects of weather, residue supply and animal components. Low temperatures increase animal energy requirements, whereas snow cover decreases residue available. Residual grain and leaf are calculated from grain yield. Residue quantity and quality are reduced daily by environmental losses and animal… 

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References

SHOWING 1-10 OF 10 REFERENCES
Growth response to escape protein and forage intake by growing cattle grazing cornstalks.
TLDR
Growing cattle grazing cornstalks responded to protein supplementation at levels above current National Research Council recommendations for 250-kg calves gaining .3 kg/d.
Changes in the rate of heat production of calves during grazing and eating
Abstract The rates of oxygen consumption by young Friesian cattle were measured before, during, and after consumption of cut or standing pasture; the animals were restrained in a paddock during these
The physiology of eating and the energy expenditure of the r uminant at pasture.
TLDR
It is suggested that this increased requirement might be due to the energy cost of eating, walking to graze, and the "work of digestion" done by the gut in handling bulky pasture materials.
Composition of corn and grain sorghum residues
The use of maize and sorghum residues for beef cattle forage is reviewed. DM yields of maize residues tended to be higher than those of sorghum but yields were affected by agronomic practices,
Energetics of body tissue mobilization.
TLDR
It appears unrealistic to relate tissue energy changes to live weight change without some consideration being given to the change in rumen fill, but data from this laboratory suggest that milk may be produced from body tissue reserves with an efficiency of 82 to 84% and that theBody tissue reserves may be replenished in late lactation by deposition of body tissue with a efficiency equal to or exceeding that of milk production.
Cattle herd dynamics: An integer and stochastic model for evaluating production alternatives
A general cattle herd simulation model is presented in which a herd is simultaneously represented as both a biological and an economic unit. The model is time dynamic, stochastic, non-optimizing and
Use of simulation models in constructing grazing systems
  • 1981