Effect of palatability on voluntary feed intake by sheep. II. The effect of altering the palatability of a wheaten hay on long-term intake and preference

1991 ◽  
Vol 42 (4) ◽  
pp. 585 ◽  
Author(s):  
SG Gherardi ◽  
JL Black ◽  
WF Colebrook
Keyword(s):  
Butyric Acid ◽  
Feed Intake ◽  
Monosodium Glutamate ◽  
Apparent Digestibility ◽  
Fractional Rate ◽  
Voluntary Feed Intake ◽  
Voluntary Intake ◽  
Quantitative Assessments

The effect of either an increase or a decrease in palatability on both long-term intake and preference for a wheaten hay was studied using two groups of sheep. Quantitative assessments of palatability confirmed that it was possible either to increase the palatability of 17 mm length hay by treating it with a combination of butyric acid plus monosodium glutamate or to decrease the palatability of 6 mm length hay by treating it with MgO. The voluntary intake of hay treated with butyric acid plus monosodium glutamate was 10% higher than that of the untreated hay when offered singly to sheep over 25 days. The increase in intake of the treated hay was associated with an increase in the apparent fractional rate of digestion in the rumen. There was no difference in voluntary intake between hay treated with MgO and untreated hay, even though there was a reduction in the apparent digestibility of the treated hay. The addition of MgO resulted in a decrease in the apparent fractional rate of digestion in the rumen which was compensated for by an increase in rumen digesta load. The palatability of a forage did affect its long-term preference, as determined by offering treated and untreated forages together in separate containers for 25 days. The sheep demonstrated a preference for hay treated with butyric acid plus monosodium glutamate (77 cf. 23%) and an aversion to hay treated with MgO (23 cf. 77%). The results indicated that palatability had little effect on the voluntary intake of a wheaten hay when it was offered as the sole forage to sheep. However, when offered a choice between forages, animals consumed significantly more of the more palatable forage.

The relations between the apparent digestibility of roughages in the rumen and lower gut of sheep, the volume of fluid in the rumen and voluntary feed intake

1967 ◽  
Vol 9 (4) ◽  
pp. 463-470 ◽  
Author(s):  
M. J. Ulyatt ◽  
K. L. Blaxter ◽  
I. McDonald
Keyword(s):  
Polyethylene Glycol ◽  
Feed Intake ◽  
Volume Of Fluid ◽  
Ratio Method ◽  
Apparent Digestibility ◽  
Voluntary Feed Intake ◽  
Ad Libitum ◽  
Voluntary Intake ◽  
Hind Gut ◽  
Volumes Of Distribution

Three sheep with permanent fistulas of the rumen were each given dried grass and two hays, each in three different amounts, and the apparent digesti-bility of the roughages in the rumen and distal to the rumen was determined. A lignin ratio method was used to measure digestibility.With increase in the amount of the poorest hay given, the proportion digested in the rumen fell and that distal to the rumen increased. With the second hay this effect was also noted but was not statistically significant. The voluntary intakes ofdry matter varied from 1·94 kg/day for the dried grass to 1·28 for the poorest hay. The volumes of distribution of polyethylene glycol in the rumen when feed was offered ad libitum, however, were the same, irrespective of the type of feed, at between 14·1 and 15·2 litres. These observations were confirmed at slaughter. The results support the hypothesis that sheep voluntarily consume roughages of different qualities to achieve constant fill of their rumens, and that little regulation of voluntary intake can be attributed to distension of the hind gut.

Effect of season and method of application of sewage sludge to grassland on the voluntary intake, digestibility of herbage and growth of weaned lambs

1997 ◽  
Vol 1997 ◽  
pp. 151-151
Author(s):  
J. Hill ◽  
J.M. Wilkinson
Keyword(s):  
Sewage Sludge ◽  
Feed Intake ◽  
Toxic Elements ◽  
Potentially Toxic Elements ◽  
Voluntary Feed Intake ◽  
Body Tissues ◽  
Voluntary Intake

Disposal of sewage sludge to grassland is likely to increase in future years as a result of legislation to control disposal to the sea (CEC, 1991) and increased production (DoE, 1993). Recent research has investigated the possible accumulation of potentially toxic elements in body tissues of lambs given diets containing known amounts of sludge (Wilkinson et al, 1996). The aim of this experiment was to study the effects of season and method of application of sludge to grassland on voluntary feed intake, digestibility and growth of lambs.

Voluntary feed intake and apparent digestibility in vivo in ponies given ad libitum access to de-hydrated grass or hay harvested from the same grass crop

1998 ◽  
Vol 1998 ◽  
pp. 131-131
Author(s):  
J. J. Hyslop ◽  
A. Bayley ◽  
A. L. Tomlinson ◽  
D. Cuddeford
Keyword(s):  
Feed Intake ◽  
Chronic Obstructive ◽  
Apparent Digestibility ◽  
Obstructive Pulmonary Disease ◽  
Respiratory Problems ◽  
Voluntary Feed Intake ◽  
Grass Hay ◽  
Ad Libitum ◽  
The Uk

De-hydrated forages are often fed to equids in the UK in place of more traditional grass hay, particularly where individual animals are known to have a sensitivity to dusty, mouldy hay which may play a part inducing respiratory problems such as chronic obstructive pulmonary disease (COPD). One such alternative forage is short-chop de-hydrated grass. However, there is very little information available on voluntary feed intake (VFI), apparent digestibility and nutrient intake parameters when de-hydrated grass is offered to equids compared with traditional grass hay. This study examines the VFI and apparent digestibility in vivo of a short-chop de-hydrated grass compared with a traditional grass hay and determines their ability to meet the predicted energy and protein needs of mature ponies.Six mature Welsh-cross pony geldings with a mean liveweight (LW) of 281 kg (s.e.d. 0.89) were individually housed and offered ad libitum access to either short-chop de-hydrated grass (DHG) or traditional grass hay (HAY) plus 60 g/h/d minerals. The DHG and HAY were made from the same 2nd cut perennial ryegrass sward cut on the same day.

scholarly journals Whole-grain cereal voluntary intake and preference in Japanese quail (Coturnix coturnix japonica)

2019 ◽  
Vol 17 (2) ◽  
pp. e0603
Author(s):  
Pedro González-Redondo ◽  
Francisco P. Caravaca ◽  
Alberto García-Ávarez ◽  
Fernando Martínez-Moreno
Keyword(s):  
Durum Wheat ◽  
Bread Wheat ◽  
Feed Intake ◽  
Live Weight ◽  
Coturnix Japonica ◽  
Whole Grain ◽  
Coturnix Coturnix ◽  
Voluntary Feed Intake ◽  
Voluntary Intake ◽  
Positive Correlations

Japanese quail (Coturnix coturnix japonica) usually fed on ground or pelleted balanced feeds, while whole grains are supplied in alternative systems. Voluntary intake and preference of four whole-grain cereals (durum wheat, bread wheat, triticale and barley) were assessed in Japanese quails. Two experiments were performed: (i) a trial with five batches of six randomly selected quails (three males, three females) allocated to each treatment consisting of one cereal or a balanced feed (control) in the voluntary intake experiment; and (ii) a trial with four bird batches receiving simultaneously the four cereals in the preference experiment. Three repetitions of each trial were performed. When feedstuffs were provided as a sole feed, voluntary feed intake differed, being the highest in quails fed the balanced feed (20.0 g/d), intermediate for durum wheat (15.0 g/d), bread wheat (15.8 g/d) or triticale (15.6 g/d), and the lowest for barley (12.1 g/d). Voluntary intake did not differ between sexes. Positive correlations existed between voluntary feed intake and live weight of quails, being the highest and very strong for the balanced feed, moderate for durum and bread wheat and barley, and weak for triticale. The preference trial showed that quails preferred durum wheat (7.1 g/d), triticale (4.0 g/d), bread wheat (3.0 g/d) and barley (0.3 g/d) in descending order, independently of sex. Positive correlations existed between daily feed intake and live weight of birds for durum and bread wheat. Strong positive correlation existed between bird live weight and total intake when the four cereals were available simultaneously. Differences in voluntary intake and preference among whole-grain cereals should be take into account when used to feed quails.

The effect of the pea to wheat ratio and harvest date on the voluntary feed intake,in vivodigestibility and nitrogen retention of pea-wheat bi-crop silages by sheep

2000 ◽  
Vol 2000 ◽  
pp. 81-81 ◽  
Author(s):  
A.T. Adesogan ◽  
M.B. Salawu ◽  
E.R. Deaville
Keyword(s):  
Feed Intake ◽  
Nutritive Value ◽  
Nitrogen Retention ◽  
Harvest Date ◽  
Apparent Digestibility ◽  
N Retention ◽  
Stages Of Growth ◽  
Voluntary Feed Intake ◽  
Two Stages

Pea-wheat bi-crop silages were reported to have moderate nutritive value when the proportion of peas in the sward was less than 200 g/kg (Adesoganet al., 1999). These authors also suggested that improvements in the digestibility, intake and nitrogen (N) balance of the forages may result from increasing the proportion of peas in the sward. This experiment was designed to examine this theory by determining thein vivoapparent digestibility, N retention and voluntary feed intake (VFI) in sheep of pea-wheat bi-crop silages containing different ratios of peas to wheat and harvested at two stages of growth.

Voluntary feed intake and apparent digestibility in vivo in ponies offered a mature threshed grass hay ad libitum

1998 ◽  
Vol 1998 ◽  
pp. 130-130 ◽  
Author(s):  
J. J. Hyslop ◽  
A. L. Tomlinson ◽  
A. Bayley ◽  
D. Cuddeford
Keyword(s):  
Feed Intake ◽  
Physical Work ◽  
Apparent Digestibility ◽  
Voluntary Feed Intake ◽  
Grass Hay ◽  
Feeding Regimes ◽  
Unrestricted Access ◽  
Ad Libitum ◽  
Restricted Feed Intake

Many mature, non-pregnant, non-lactating equids are often kept in circumstances where they are expected to perform only light physical work or activity eg: a childs pony. Consequently their maintenance energy and protein needs can often be met at very restricted feed intake levels. Conversely, when they are housed during the winter months it is believed desirable to manage such animals on unrestricted ad libitum feeding regimes in order to allow the animals to exhibit their natural feed intake pattern and consume forage on a little and often basis throughout the daily feeding period. However, ad libitum access to the diet may lead to such animals becoming excessively fat. These conflicting needs of low energy and protein requirement coupled with the desirability of unrestricted access to the diet could both be met, at least in part, if a low quality forage is available ad libitum. This study examines the voluntary feed intake and apparent digestibility in vivo of a mature threshed grass hay offered ad libitum and determines its ability to meet the predicted energy and protein needs of mature ponies.

Voluntary intake and apparent digestibility in ponies offered alfalfa based forages ad libitum

2001 ◽  
Vol 2001 ◽  
pp. 90-90
Author(s):  
J. J. Hyslop ◽  
S. Calder
Keyword(s):  
Basal Diet ◽  
Apparent Digestibility ◽  
Protein Requirements ◽  
Voluntary Feed Intake ◽  
Grass Hay ◽  
Digestible Crude Protein ◽  
Ad Libitum ◽  
Voluntary Intake ◽  
The Uk

There is increased interest in using forages other than grass hay as the basal diet for equines in the UK. Whilst a range of short-chopped dehydrated alfalfa based forages may be used as alternatives to grass hay in equine diets, there is very little information available on their likely intake characteristics, apparent digestibilities or their nutritive values. The objectives of the current experiment were:- 1) to determine the voluntary feed intake (VFI) characteristics of three alfalfa based forages when offered ad libitum to ponies, 2) to determine the in vivo apparent digestibility, digestible energy (DE) and digestible crude protein (DCP) contents of these forages and 3) to compare the actual energy and protein intakes with theoretical energy and protein requirements.

9.4 Voluntary Intake in Ruminants Affected by Silage Extracts and Amines in Particular

1982 ◽  
Vol 6 ◽  
pp. 180-182
Author(s):  
J. G. Buchanan-Smith
Keyword(s):  
Food Intake ◽  
Butyric Acid ◽  
Feed Intake ◽  
Dry Matter ◽  
Gamma Amino Butyric Acid ◽  
Maize Silage ◽  
Short Term ◽  
Amino Butyric Acid ◽  
Voluntary Intake

Gamma amino butyric acid (GABA) is a food intake depressant (Morley, 1980) and is quantitatively a significant nitrogenous constituent in silage (Oshima and McDonald, 1978). When maize silage extracts were infused into the rumen of sheep, it was shown that short-term feed intake could be depressed but this effect was attributed to high rumen osmolality (Phillip, Buchanan-Smith and Grovum, 1981) The purpose of the present experiments was to determine whether GABA and low dry matter lucerne silage extracts could depress food intake in sheep.

Seasonal production of Andropogen Gayanus: II. Seasonal changes in digestibility and feed intake

1970 ◽  
Vol 75 (3) ◽  
pp. 369-373 ◽  
Author(s):  
R. J. Haggar ◽  
M. B. Ahmed
Keyword(s):  
Feed Intake ◽  
Seasonal Changes ◽  
Crude Protein ◽  
Dry Matter ◽  
Nutritive Value ◽  
Protein Digestibility ◽  
Dry Matter Digestibility ◽  
Voluntary Feed Intake ◽  
Andropogon Gayanus ◽  
Voluntary Intake

SUMMARYTwenty-seven sheep feeding trials were carried out on freshly cut Andropogon gayanus, fed daily during three wet seasons, 1966–8.In each year, dry-matter voluntary intake and digestibility were highest during the first part of the growing season and declined with advancing maturity of the herbage. However, at the time of ear emergence in early October, there were small increases in voluntary intake of dry-matter and crude protein digestibility, although further decreases followed after mid-October.Determinations of in vitro digestibility indicated that elongating stems during early October were at least as digestible as leaves.Seasonal changes in crude protein digestibility were much greater than changes in dry-matter digestibility; seasonal changes in feed intake were intermediate. Voluntary feed intake was related to dry-matter digestibility.Voluntary feed intake and digestible crude protein were both closely related to the crude protein content of the forage. It was concluded that crude protein is a useful criterion for predicting nutritive value.

Effect of forage particle length on rumen digesta load, packing density and voluntary feed intake by sheep

1992 ◽  
Vol 43 (6) ◽  
pp. 1321 ◽  
Author(s):  
SG Gherardi ◽  
RC Kellaway ◽  
JL Black
Keyword(s):  
Particulate Matter ◽  
Packing Density ◽  
Dry Matter ◽  
Intake Rate ◽  
Fractional Rate ◽  
Voluntary Feed Intake ◽  
Outflow Rate ◽  
Voluntary Intake ◽  
The Difference ◽  
Particle Length

The effect of forage particle length (4 to 101 mm) on packing density of oesophageal extrusa was investigated following ingestion of chopped wheaten hay by sheep. Packing density of oesophageal extrusa from 4 mm hay was greater than that from hay 21 mm and longer; the difference was associated with smaller particle size and a lower modulus of fineness. There was a significant positive correlation between the intake rate of hay by individual sheep and size of extrusa particles for three of the five forage lengths. The effect of packing density of ingested forage on rumen digesta load and voluntary intake was examined subsequently by feeding sheep hay chopped to either 4 or 21 mm lengths. hducing the particle length of hay from 21 to 4 mm resulted in small increases (P < 0.05) in the intake of dry matter (DM) [26.0 cf. 27.8 g per kg runen digesta-free liveweight (RFLW)] and organic matter (OM) (23.8 cf. 25.5 g per kg RFLW). Increases in intake were paralleled by increases (P < 0.01) in loads of both rumen DM (29.7 cf. 33.9 g per kg RFLW, for 4 and 21 mm hay respectively) and OM (25.2 cf. 29.1 g per kg RFLW). The higher digesta load was associated with higher concentrations (P < 0.05) of DM (133.6 cf. 122.5 g per kg total digesta) and OM (114.9 cf. 103.8 g per kg total digesta) in the rumen, but not with a difference in the measured packing density of particulate matter. The increase in the intake of 4 mm hay was totally attributable to the greater DM load of rumen digesta because the fractional outflow rate of particulate matter was lower for the 4 mm hay (0.55 cf. 0.63/day) and the apparent fractional rate of digestion was similar (0.42 cf. 0.43/day) in sheep fed the two lengths of forage.

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