Effects of Feeding Lactating Dairy Cows Varying Forage-to-Concentrate Ratios

Nelson, B.D.; Ellzey, H.D.; Morgan, Erin; Allen, Marvin

doi:10.3168/jds.s0022-0302(68)87280-7

Cited by 21 publications

(2 citation statements)

References 13 publications

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“…Diet supplementation with concentrate for dairy cows is a function of the nutrient concentration in the forage, which in turn is a function of the stage of maturity of the forage (Crampton and Forshaw 1939;Crampton and Jackson 1944 Harvey (1960) and differences between means were tested by linear comparison (Harvey 1960) and multiple range test (Duncan 1955) (1968). Nelson's (1968) Leaver (1973) obtained similar results with hays of different qualities.…”

supporting

confidence: 74%

Effects of Stage of Maturity of Timothy Hay and Concentrate Supplementation on Performance of Lactating Dairy Cows

Vinet¹,

Bouchard²,

St-Laurent³

1980

Can. J. Anim. Sci.

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The effects of concentrate supplementation of timothy hay cut at the late-boot and early-bloom was tested with dairy cows during two feeding and two digestibility trials. The diets for each trial contained the following hay to concentrate ratios: 100:0, 85:15, 70:30 and 55:45. Daily dry matter intake and fat-corrected milk production, respectively, were 15.1, 16.8, 18.6, 19.4 kg; 16.7, 20.7, 23.1, 21.0 kg for the four diets containing early-cut timothy hay and 11.0, 14.7, 17.2, 19.8 kg; 8.4, 10.7, 13.3 and 15.9 kg for the late-cut timothy hay. Percent digestibilities of the four diets containing early-cut and late-cut timothy hay, respectively, were 65.6, 65.6, 66.9, 66.8 and 53.6, 53.6, 60.2, 62.9 for dry matter; 62.5, 63.7, 65.2, 65.3 and 24.0, 39.3, 53.3, 60.0 for nitrogen; 70.3, 70.3, 68.4, 67.8 and 53.7, 53.4, 60.1, 62.6 for gross energy; 66.4, 65.3, 67.1, 66.6 and 55.0, 54.5, 61.4, 63.5 for cell wall constituents; 68.2, 65.8, 64.9, 63.4 and 50.8, 48.2, 52.7, 52.1 for acid detergent fiber. Timothy hay cut at late-boot stage as sole source of feed supported a daily milk production of 16.7 kg compared to 15.9 kg for cows consuming timothy hay cut at late-bloom stage supplemented with 9 kg of concentrate.

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supporting

confidence: 74%

Effects of Stage of Maturity of Timothy Hay and Concentrate Supplementation on Performance of Lactating Dairy Cows

Vinet¹,

Bouchard²,

St-Laurent³

1980

Can. J. Anim. Sci.

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“…The packed cell volume was determined in 3 x 115-mm tubes centrifuged at 1500 x g for 0.5 h. Glucose was determined in protein-free filtrates (Somogyi 1945) by the enzymatic glucose oxidase procedure (G-148 glucose oxidase reagent kit, Fisher Scientific Co.) and plasma NEFA by photometric adaptation of Dole's method (Mosinger 1965 For personal use only. Nelson et al (1968) found an increase in DEI as the proportion ofgrain in the diet increased, the energy level (Blaxter and Wainman 1964). It appears that the increase in rate of gain as the proportion of grain in the diet increases is due to rate and products of digestion rather than to DEC.…”

mentioning

confidence: 93%

The influence of digestible energy concentration of the diet on feed intake and rate of gain by beef steers

Hironaka¹,

Kozub²

1991

Can. J. Anim. Sci.

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Hironaka, R. and Kozub, G. C. 1991. The influence of digestible energy concentration of the diet on feed intake and rate of gain by beef steers. Can. J. Anim. L'augmentaiion de la concentration de suif tann6 dans la ration rdduit I'ingestion quotidienne des deux ratiois, mais I'ingestion quotidienne d'6nergie digestible (DE) diminue puis augmente avec les rations de foin-concentr6. Les rations tout concentr6 n'influent pas sur la DE requise par unit6 de gain de poids' mais celle-ci augmente puis diminue avec l'accroissement de la teneur en suif tann6 des rations de foinconcentr6. La cbncentration de suif tann6 dans les rations tout concentr6 n'influe pas sur les mesures de la carcasse. L'6paisseur du gras dorsal de la carcasse diminue avec I'augmentation de Ia teneur en suiftann6 des rations de foin-concentr6. Le relbvement de la concentration de suiftann6 dans la ration augmente les teneurs en acides gras non est6rifi6s du plasma sanguin. L'h6matocrite augmente avec l'aicroissement de la teneur en suif tann6 de la ration des bouvillons nourris seulement de concentr6, mais pas de ceux nourris de foin-concentr6. La concentration de suif tann6 dans la ration n'influe pas sur la teneur en glucose sane.uin.

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Regulation of food intake in dairy cows in relation to milk production

Bines¹

1976

Livestock Production Science

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Effects of Feeding Lactating Dairy Cows Varying Forage-to-Concentrate Ratios

Cited by 21 publications

References 13 publications

Effects of Stage of Maturity of Timothy Hay and Concentrate Supplementation on Performance of Lactating Dairy Cows

Effects of Stage of Maturity of Timothy Hay and Concentrate Supplementation on Performance of Lactating Dairy Cows

The influence of digestible energy concentration of the diet on feed intake and rate of gain by beef steers

Regulation of food intake in dairy cows in relation to milk production

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