[The energy requirements of Holstein-Friesian heifers during rearing and pregnancy under the tropical conditions of Cuba. 2. Generalization of the results and derivation of the energy requirements].
Experimental results of an individual feeding experiment with 48 Holstein-Frisian heifers were generalized with regard to live weight development and energy intake by means of the Janoschek function and the extended e-function resp. The requirement of metabolizable energy was derived from the results of energy intake on dependance on live weight and live weight gain. In comparison with the data of the NRC (1978) a requirement by 10% lower was the result. Due to adding a 10% deficiency supplement at present required under Cuban conditions of production the use of the NRC recommendations (1978) is still justified. Without the addition of the deficiency supplement the results showed good agreement with requirement data of INRA 1978.
Instituto de Ciencia Animal, La Habana, Kuba.
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D000821:Animal Feed; D000818:Animals; D002417:Cattle / Q000254:growth & development / Q000378:metabolism*; D003462:Cuba; D002149:Energy Intake; D004734:Energy Metabolism; D005260:Female; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000378:metabolism*; D014329:Tropical Climate; D015430:Weight Gain
Untersuchungen zum Energiebedarf bei Holstein-Frisian-Färsen während der Aufzucht und Trächtigkeit unter den tropischen Klimabedingungen Kubas. 2. Mitteilung. Verallgemeinerung der Ergebnisse und Ableitung des Energiebedarfs.