Statistical research on the digestibility in the cow. I. Dry matter and energy

Paquay, R.; Baere, R. De; Lousse, A.

doi:10.1017/s0021859600087797

Cited by 8 publications

(2 citation statements)

References 25 publications

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“…Tyrrell & Moe (1975) listed nine trials in which falls in proportional digestibility averaged 004/unit increase in intake equal to I MM. Falls of this order were also recorded by Moe (1965), Wagner (1965), Tyrrell (1966), Leaver, Campling & Holmes (1969), Ekern (1972), Paquay, de Baere & Lousse (1972), Trimberger et al (1972), Trigg, Bryant & Cox (1980, Lindgren (1981), Colucci, Chase & Van Soest (1982), Uden (19846). Moe, Flatt & Tyrrell (1972) reported that from 540 metabolism trials the mean fall in proportional digestibility of D.M.…”

Section: Dtscusstonmentioning

confidence: 62%

Effect of amount consumed and diet composition on the apparent digestibility of feed in cattle and sheep

Bines¹,

Broster²,

Sutton³

et al. 1988

J. Agric. Sci.

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Digestibility trials were conducted at two stages of lactation with each of 107 Friesian cows using three diets (60:40, 75:25, 90:10 proportions of compound feed to medium quality hay fed long). Each cow received throughout lactation fixed daily allowances of one of these diets at either 2-26 or 2-63 times average maintenance requirements (MM), or was fed ad libitum, average intake equalling 3-07 MM. The digestibilities of the diets were also measured on immature cattle at 0-76 and 1-33 MM and sheep at 0-65 and 1-27 MM.For all classes of stock the digestibility of dry matter increased linearly and that of fibre decreased curvilinearly with increasing proportion of compound in the diet. There was no interaction of effects of diet composition and amount consumed on digestibility of feed. The digestibility of both dietary components declined for the young cattle and sheep with increased intake. The digestibilities for lactating cows were lower than for other stock but did not change with amount consumed or milk yield. Digestibility was slightly higher for first and second calf cows than for adult cows; and was higher for organic matter in mid lactation compared with early lactation for adult cows.These results for dairy cows conflict with the generally accepted interpretation that a linear decline in digestibility occurs from once to five times maintenance intake, embracing all classes of stock. a s t n e proportion of compound increased in the diet the digestibility increased. The majority of experiments to study the effects There are several constraining factors regarding of amount consumed and diet composition on this interpretation that indicate the necessity for a apparent digestibility of feed (here referred to as re-opening of this question. First the above experidigestibility) by dairy cows have followed the mental method does not include a rigorous separation hitherto accepted procedure of variation in amount of the effects of the three main components: yield of of compound in the ration proportionally to yield: milk, amount eaten, and diet composition. Also the the higher-yielding cows received a greater propor-alliance of non-lactating to lactating stock is fretion of compound and probably had a greater dry-quently variable (see Discussion). These comments matter intake. Such trials in combination with on experimentation are strengthened by a group of digestibility trials on young cattle or sheep at much experiments, the results of which indicate little or no lower feed allowances expressed as multiples of decline in digestibility with increase in intake by maintenance (MM) than allowed to the lactating dairy cows per se. These trials largely, but not stock led to the conclusion that as the amount totally, involve rationing by systems other than consumed increased the digestibility declined, and 'feeding according to yield'.

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Section: Dtscusstonmentioning

confidence: 62%

Effect of amount consumed and diet composition on the apparent digestibility of feed in cattle and sheep

Bines¹,

Broster²,

Sutton³

et al. 1988

J. Agric. Sci.

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show abstract

“…Individual animal differences may have contributed inordinately to the large differences in DMD between cattle receiving different rations since only one Hereford was tested with each ration. However, individual animal differences in DM digestibility rarely exceed 5% (Paquay et al 1972) while we observed a difference between cattle in overall DMD of 44% (Table 4). Since the hay and grain were fed ad libitum, bison receiving the ration supplement may have consumed relatively less grain than the Hereford receiving the ration.…”

Section: Comparison Of Bison and Cattle Rumen Functionmentioning

confidence: 63%

Bison and Cattle Digestion of Forages from the Slave River Lowlands, Northwest Territories, Canada

Hawley¹,

Peden²,

Reynolds³

et al. 1981

Journal of Range Management

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Dry matter disappearance (DMD) of native forages collected from the Slave River Lowlands (SRL), Northwest Territories, was consistently greater in bison (Bison bison) than in Hereford cattle (Bos taurus) when measured with a nylon bag technique. Overall average DMD values were 52% and 39% for bison and cattle, respectively. Mean percent DMD values for each plant species were: willow (Salk spp.), 56; slough sedge (Carex atherodes), 50; baltic rush (Juncus balticus), 47; aleppo avens (Geum aleppicum), 44; and northern reedgrass (Calamagrostis inexpansa), 39. Dry matter disappearance was inversely correlated (P < 0.05) with crude fiber content of the sample. Dependence of DMD on crude fiber content was less (P < 0.001) in cattle than in bison. Based on relative digestibilities and data on forage intake, we concluded that slough sedge was the most important bison forage in the study area. Average DMD was 44% greater (P< 0.01) in a Hereford fed hay than in a Hereford fed hay plus a concentrate supplement. There was no difference (DO.05) hi DMD between two bison fed the hay ration and two fed hay plus the supplement. and was chosen to make these comparisons. Materials and Methods Samples of native forages were collected in the SRL in February and June, 1975. Summer samples of willow consisted of approximately equal dry weights of leaves and twigs from the terminal 12 cm of the twigs. Winter willow samples were comprised of twigs only. Herbaceous plant samples included the entire aerial portion of the plant cut at approximately 2 cm above ground. All samples were air-dried and ground through a l-mm mesh screen. Nylon bag digestibility experiments were conducted using two ruminally fistulated adult Hereford cattle and four ruminally fistulated adult bison at the Pawnee Site, International Biological Program, Nunn, Colorado, during Jaquary 1976. One Hereford and two bison were fed crested wheatgrass hay containing 6% crude protein (CP) (Table 1). One Hereford and two bison were fed

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Statistical research on the digestibility in the cow: III. Carbohydrates

Paquay¹,

Baere²,

Lousse³

1972

J. Agric. Sci.

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The results obtained for the digestibility of the carbohydrates with 116 different rations fed to 242 non-pregnant dry cows and 96 lactating cows were studied.Except for some roughages, reducing sugars, non-reducing sugars, and starch digestibility is always very high. Reducing-sugars digestibility is related to starch content and starch digestibility to crude-fibre content.Pentosans and crude-fibre digestibility is related to dry-matter intake and to starch, pentosans and crude-fibre content. When the ration contains less than 12 % protein, a significant correlation coefficient also exists between crude-fibre digestibility and protein content. But pentosans and crude-fibre digestibility depends above all on the nature of the feeds and on the stage of maturity of the forage.

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Statistical research on the digestibility in the cow. I. Dry matter and energy

Cited by 8 publications

References 25 publications

Effect of amount consumed and diet composition on the apparent digestibility of feed in cattle and sheep

Effect of amount consumed and diet composition on the apparent digestibility of feed in cattle and sheep

Bison and Cattle Digestion of Forages from the Slave River Lowlands, Northwest Territories, Canada

Statistical research on the digestibility in the cow: III. Carbohydrates

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