Effect of Photoperiod on the Response of Developing Pullets to Different Nutritional Treatments

Berg, Lawrence R.; Hansen, Reed S.; Bearse, Gordon E.

doi:10.3382/ps.0421346

Cited by 15 publications

(15 citation statements)

References 9 publications

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“…This suggests that a rearing period day-length of less than 9 hours, at a critical time in the rearing period, may result in a reduction in subsequent egg size. These results agree with reports by Siegel et al (1963), Bowman et al (1964), Berg et al (1963) and Lillie and Denton (1965) who reported that day-length declining to 6 to 8 hours or maintained on a constant 6-to 8-hour length resulted in a mean egg size reduction compared with a longer day-length.…”

Section: Discussionsupporting

confidence: 95%

“…These results are contrary to reports by McClary (1964), and Morris et al (1964) which suggest that a "step-down, step-up" light treatment is superior to other treatments, but Berg et al (1963) and Lillie and Denton (1965) reported that a constant 14-to 16-hour day-length resulted in equivalent egg production compared with other light treatments which supports results reported here. Smith and Noles (1963), Lowe and Heywang (1964), and Noles and Smith (1964) worked with a wide variety of light treatments which included a 14-to 16-hour laying period day-length but failed to demonstrate a marked advantage for one treat-ment over another.…”

Section: Discussioncontrasting

confidence: 84%

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The Effect of Photoperiodism and Rearing Period Feed Restriction on the Performance of Five Leghorn Strains

Proudfoot¹,

Gowe²

1967

Poultry Science

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Section: Discussionsupporting

confidence: 95%

Section: Discussioncontrasting

confidence: 84%

The Effect of Photoperiodism and Rearing Period Feed Restriction on the Performance of Five Leghorn Strains

Proudfoot¹,

Gowe²

1967

Poultry Science

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“…On average this advantage proved to be 6-7 eggs per bird and was highly significant. Data for terminal rate of lay were supplied by Gowe et al (i960), for the last 5 d of production; Bullock (1962), for the last 14 d; Berg, Hansen and Bearse (1963), for the last 28 d and Strain et al (1965), for the last 14 d. In only 2 cases out of the 33 comparisons was production lower at this stage from restricted-fed as opposed to fully fed pullets (see Table 3, consideration D).…”

Section: Postulate Ofmodelmentioning

confidence: 99%

“…4.-Illustration of relationship between level of food restriction during rearing period and days delayin sexual maturity. Data from: Ashcroft (1961), Berg and Bearse (1961), Berg et al (1963), Blount (i960), Bruckner and Hill (1959), Bullock et al (1963), Deaton and Quisenberry (1963), Fuller (1962), Fuller and Dunahoo (1962), Gardiner and Maclntyre (1962), Gowe et al (i960), Hollands and Gowe (1961), Isaacks et al (1960), Lillie and Denton (1966), Maclntyre and Aitken (1959), Maclntyre and Gardiner (1964), Milby and Sherwood (1956), Proudfoot and Gowe (1967), Ringrose (1958), Schneider et al (1955), Strain et al (1965), Tomhave (1958), Vondell (1943) and Walter and Aitken (1961). delay in maturity.…”

Section: Quantitative Food Restrictionmentioning

confidence: 99%

“…The age of the flock when the first egg is laid (as opposed to mean age at first egg) tends to be a measure of the maturity of a minority of a population of pullets and is subject to very high sampling error. In collating the reported data, a measure of Ashcroft (1961), Berg and Bearse (1961), Berg et al (1963), Blount (i960), Bullock et al (1963), Deaton and Quisenberry (1963), Fuller (1962), Fuller and Dunahoo (1962), Gardiner and Maclntyre (1962), Gowe et al (i960), Hollands and Gowe (1961), Hunton and Sykes ( 419 mean age at sexual maturity, such as age at 50 per cent lay, was selected wherever possible. Bullock, Morris and Fox (1963) used data reported by Ashcroft (1961) to calculate a predicted increase in age to 40 per cent production of o-6 d for every 1 per cent decrease in feeding level from 90 to 70 per cent restriction.…”

Section: Quantitative Food Restrictionmentioning

confidence: 99%

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A quantitative analysis of the literature concerning the restricted feeding of growing pullets

Lee¹,

Gulliver²,

Morris

1971

British Poultry Science

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The sexual maturity of growing pullets can be retarded either by restricting calorie intake or by feeding a diet deficient in one or more essential amino acids, Several methods have been proposed for achieving either of these objectives. In this review the methods have been classified as (a) limiting the birds' time of access to food, (b) quantitative food restriction, (c) the use of low energy diets and (d) dietary protein restriction.Food restriction by limiting the time of access to food has given inconsistent results and is an unsatisfactory technique. Birds quickly learn to eat normal quantities of food in a very short space of time.Quantitative food restriction has been widely used in experiments and is usually applied from about 6 to about 20 weeks of age. The available evidence enables relationships to be established between the degree of food restriction and subsequent body weight and sexual maturity. The effect of rearing treatment on mortality and rate of lay is also examined.The ad libitum feeding of a low-energy growing diet has always resulted in greater rearing food costs. This is because moderate reductions in energy content of the diet are offset by higher food intake. Diets sufficiently low in energy to cause a reduction in calorie intake will involve the purchase and handling of very large proportions of non-nutritive material.The use of protein-deficient diets during the growing period, or from one day of age, offers a suitable means of delaying sexual maturity. The effects of such a treatment are apparently very similar to those of restricted feeding, but there is a lack of suitable comparisons of the alternative methods.

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The effect of feed restriction on sexual maturity and initial reproductive performance of broiler pullets under different light treatments

Pym¹,

Sledge²

1969

Aust. J. Exp. Agric.

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An experiment was conducted to examine the effect of restricted feeding under two lighting systems during the rearing period on the initial laying performance of broiler type pullets. The rearing treatments were imposed at nine weeks of age, removed at 22 weeks and the trial was discontinued at 36 weeks of age. The feeding treatments (restricted versus ad lib.) were arranged factorially with the lighting treatments (decreasing versus increasing). Birds reared on restricted feeding reached sexual maturity 16 days later than full fed birds, ate 17 per cent less feed to 22 weeks and gained seven per cent less in body weight to 24 weeks of age and ten per cent less to 36 weeks. Birds reared under the decreasing lighting regime reached sexual maturity at the same age as those reared under increasing lighting, ate five per cent more feed during the rearing and laying periods and gained five per cent more in body weight to 24 weeks. The mean weight of eggs laid between 24 and 34 weeks of age from pullets subjected concurrently to decreasing lighting and restricted feeding was approximately two grams heavier than that of the other three treatment combinations. Mean egg weight was one gram greater in the restricted than in the full fed group, although the difference was not statistically significant. Laying mortality was lower in the restricted fed group than in the full fed group.

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Effect of Photoperiod on the Response of Developing Pullets to Different Nutritional Treatments

Cited by 15 publications

References 9 publications

The Effect of Photoperiodism and Rearing Period Feed Restriction on the Performance of Five Leghorn Strains

The Effect of Photoperiodism and Rearing Period Feed Restriction on the Performance of Five Leghorn Strains

A quantitative analysis of the literature concerning the restricted feeding of growing pullets

The effect of feed restriction on sexual maturity and initial reproductive performance of broiler pullets under different light treatments

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