Effect of the amount and form of roughage in the diet on digestibility of whole maize grain in cows and steers

Nordin, Massita; Campling, R. C.

doi:10.1017/s0021859600026770

Cited by 12 publications

(6 citation statements)

References 12 publications

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“…Watson et al 1948;Blaxter, 1962;Wilkins et al 1972;Lindgren, 1981) but different on other occasions (e.g. Blaxter & Wainman, 1964;Blaxter, Wainman & Davidson, 1966;Leaver et al 1969;Wilson, Adeeb & Campling, 1973;Nordin & Campling, 1976;Aerts et al 1984-85). Thomas & Campling (1977) and Aerts et al (1984-85) comment on the physiological and eating behaviour differences between the two species.…”

Section: Digestibility In Lactating Versus Non-lactating Cattle and Smentioning

confidence: 99%

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: Digestibility In Lactating Versus Non-lactating Cattle and Smentioning

confidence: 99%

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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“…intake of digestibly dry mattcr was similar among treatments mainly due to the large decrease (P < 0.05) in starch digestibility with acid-treated whole corn. Shelled corn must be cracked or ground to avoid a depression in kernel digestibility when fed with moderate or high levels of roughage (Nordin and Campling 1976). Ammoniating whole corn resulted in starch and energv digestibilities similar to ensiled ground corn.…”

Section: Feedlot Trialmentioning

confidence: 99%

Ammonia or Urea Treatment of Whole High Moisture Shelled Corn

Mowat¹,

McCAUGHEY²,

Macleod³

1981

Can. J. Anim. Sci.

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Treatments of high moisture shelled corn were compared in diets containing approximately 60% (dry matter (DM) basis) corn silage. In an initial digestibility trial, treatments were: (1) ensiled, ground; (2) 1.5% (wt/wt) mixture of acetic: propionic acid, whole; (3) 2% (wt/wt DM basis) anhydrous ammonia, whole. Treatments were evaluated with six yearling steers in a double 3 × 3 latin square design. Urea was included in the ensiled and acid-treated corn diets to supply sufficient nitrogen. Ammoniating whole corn resulted in similar starch and energy digestibilities compared to ensiled ground corn. However, a large decrease in starch digestibility occurred with acid-treated whole corn. Digestibility of acid detergent fiber was greater (P < 0.05) with both ammoniated and acid-treated whole than ensiled ground corn. In a feedlot trial, two high moisture corn treatments compared were: (1) ensiled, ground; (2) 3.7% (wt/wt DM basis) urea, whole. Eighty Hereford yearling steers compared the two corn diets each with or without monensin. Temperatures rose steadily within bins plateauing approximately 21/2 wk after storage. The amount of urea that hydrolyzed to ammonia varied depending upon location within bins. A total of 1.4% DM loss occurred during storage. Urea-treatment tended to slightly reduce liveweight gain and feed efficiency. Monensin decreased intake (P < 0.05) and slightly improved feed efficiency (P > 0.05) with both types of corn. Effects of monensin on rumen VFA were similar with both corn diets. Type of corn had no effect on rumen VFA proportions.

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“…Sci. 60: 683-6EE (September 1980) ammonia may be an effective preservative (Lancaster et al 191 (Nordin and Campling 1976 (@rskov et al 1978).…”

mentioning

confidence: 99%

Preservation and Processing of Whole High Moisture Shelled Corn With Ammonia

Srivastava¹,

Mowat²

1980

Can. J. Anim. Sci.

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Effect of the amount and form of roughage in the diet on digestibility of whole maize grain in cows and steers

Cited by 12 publications

References 12 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

Ammonia or Urea Treatment of Whole High Moisture Shelled Corn

Preservation and Processing of Whole High Moisture Shelled Corn With Ammonia

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