TRIAL 1. Three methods of feeding, I--long hay ad libitum plus 1 kg of concentrate per 2.5 kg of FCM; II--long hay and concentrate ad libitum; III--complete feed ad libitum, were compared in a switchback design. The complete feed consisted of a mixture of 70% concentrate and 30% coarsely ground hay (2.54-cm screen). Daily TDN intake was 9.78, 13.49, and 11.56 kg for Treatments I, II, and III, respectively. Mean daily milk prodtTetion was 17.86, 19.23, and 19.70 ; FCM was 17.11, 16.61, Treatment Ill was significnatly greater than I for both milk and FChf yields (P<.05). Milk fat percentages were 3.80, 3.22, and 3.65 for Treatnlents I, II, and Ill, respectively. TRIAL 2. Ad libitum feeding of ground hay, ground corn cobs, and cottonseed hulls complete feeds were compared in a Latinsquare changeover design. Mean daily feed intake of the cottonseed hull complete feed (20.2 kg) was greater (P<.01) than the hay or corn cob complete feeds (17.9 and 18.1 respectively). Milk production of the cows on the hay and cottonseed hull complete feeds was 22.0 and 21.9 kg, respectively. This was greater (P<.05) than the 20.8 kg produced by the cows fed the corn cob complete feed. Xo significant differences in milk composition were observed between the different complete feeds.
No takes yet. Share an insight, caveat, or question.
McCoy et al. (1966) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: