The Relative Feeding Value of Alfalfa Hay and Alfalfa Light Timothy Mixed Hay at Approximately The U. S. No. 1 Grade Level

Gordon, C.H.; Moore, L.A.; Hosterman, W. H.

doi:10.3168/jds.s0022-0302(56)94830-5

Cited by 1 publication

(1 citation statement)

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“…Feedstuff digestibility for Holstein heifers fed diets that contained no roughage (Mead and Goss, 1935) was shown to be consistent with what would be calculated from ingredient digestibility coefficients determined from the book values of Henry and Morrison (1923), which had been determined when forage was fed. Differing hay quality grades affected gains and feed efficiency (Kelkar and Gullickson, 1950;Gordon et al, 1954Gordon et al, , 1956; however, it was noted that the current chemical and physical analyses were insufficient to completely characterize the value of hays for heifer growth (Gordon et al, 1952). Donker et al (1968) published a method for evaluating forage energy production formulas by comparing various published energy intake estimates with heifer requirements.…”

Section: Nutrient Requirementsmentioning

confidence: 99%

A 100-Year Review: A century of dairy heifer research

Heinrichs

Zanton

Lascano

et al. 2017

Journal of Dairy Science

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The years 1917 to 2017 saw many advances in research related to the dairy heifer, and the Journal of Dairy Science currently publishes more than 20 articles per year focused on heifers. In general, nutrition and management changes made in rearing the dairy heifer have been tremendous in the past century. The earliest literature on the growing heifer identified costs of feeding and implications of growth on future productivity as major concepts requiring further study to improve the overall sustainability of the dairy herd. Research into growth rates and standards for body size and stature have been instrumental in developing rearing programs that provide heifers with adequate nutrients to support growth and improve milk production in first lactation. Nutrient requirements, most notably for protein but also for energy, minerals, and vitamins, have been researched extensively. Scientific evaluation of heifer programs also encouraged a dramatic shift toward a lower average age at first calving over the past 30 yr. Calving at 22 to 24 mo best balances the cost of growing heifers with their production and lifetime income potential. Increasingly, farms have become more progressive in adopting management practices based on the physiology and nutrient needs of the heifer while refining key economic strategies to be successful. Research published in the Journal of Dairy Science has an integral role in the progress of dairy heifer programs around the world.

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