The Relationship of Floor Space to Factors Influencing Broiler Growth

Moreng, R. E.; Enos, H. L.; Buss, E. G.; Hartung, T. E.

doi:10.3382/ps.0401039

Cited by 14 publications

(5 citation statements)

References 2 publications

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“…Mean body weights were lower at high density than low density, which is in agreement with numerous studies (Moreng et al, 1961;Andrews, 1972;Weaver et al, 1973Weaver et al, , 1982Proudfoot et al, 1979).…”

Section: Resultssupporting

confidence: 92%

Performance and Carcass Quality of Broilers Grown on Raised Floorings and Litter

Andrews¹,

Whiting²,

Stamps³

1990

Poultry Science

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Four trials were conducted to compare performance of broilers grown on three types of raised floorings with broilers grown on conventional litter. One rice hull litter (Litter) floor and three raised floors were tested. The three raised floors were 1) black plastic-coated expanded metal, 2) white plastic flooring with rectangular openings (Wh-Lg), and 3) white plastic flooring with square openings. Stocking densities of 22.5 broilers/m 2 were tested on the raised floors against 13.S broilers/m 2 on the litter floor in all four trials. Equivalent lower densities (13.5/m 2 ) were compared across all floor types in Trial 4.Final (8 wk) weights were significantly heavier (P<05) for broilers grown on litter than for broilers grown on raised floors in one of four trials for males and one of three trials for females. No differences in body weight were found among males grown on raised floors in four trials and in only one of three trials for females. Feed conversion was significantly superior for broilers grown on litter floors than for broilers grown on the raised floors in two of four trials with no differences among raised floors. Percentage of mortality was least on Utter floors (low density) and greatest for broilers grown on Wh-Lg floors, although no differences were found when floors were compared across equal densities in Trial 4. Percentage incidence and relative severity of breast blisters and infected feather follicles were significantly greater (P<05) for broilers grown on raised floors than for those grown on litter. No consistent differences were found among broilers grown on raised floors. No significant (P

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Section: Resultssupporting

confidence: 92%

Performance and Carcass Quality of Broilers Grown on Raised Floorings and Litter

Andrews¹,

Whiting²,

Stamps³

1990

Poultry Science

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“…Experiments with broilers have been confined largely to a range of stocking densities from 0-05 to 0-14 m 2 of floor area per bird. Certain workers have shown that increasing the density of stocking within this range causes slower growth (Hartung, 1955;Milligan, Marr, Eaton, Kifer and Wilcke, 1957;Brooks, Judge, Thayer and Newell, 1958;Hansen and Becker, i960;Moreng, Enos, Buss and Hartung, 1961;Wisman, Beane, Luckhamand Essary, 1961), less efficient food utilisation (Hartung, 1955) and higher mortality and more feather pecking resulting in poorer feathering (Moreng et al, 1961;Skoglund and Palmer, 1961;Tindell, Moore, Gyles, Johnson, 13 Downloaded by [Monash University Library] Dreesen, Martin and Siegel, 1968), but other workers have shown that these undesirable effects are not necessarily present (Heishman, Cunningham and Clark,' 1952;Siegel and Coles, 1958;Richards and Hamilton, 1967). This connection of results supports the opinion that other related factors of management may influence the response of birds to different floor space treatments.…”

Section: Introductionmentioning

confidence: 97%

The effect of varying stocking density on the development and subsequent laying performance of floor‐reared pullets

Wells¹

1972

British Poultry Science

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Light-weight, hybrid pullets were reared on litter at 0.070, 0.093, 0.139 and 0.186 m 2 of floor area per bird. Flock size was constant at 400 birds per pen and other related factors of management were standardised. Results showed that the different densities of stocking had no commercially important effect on growth rate, food consumption or viability, but feathering was poorer in the more densely populated groups.At 18 weeks of age, some of the birds from each treatment were transferred to battery cages and others to deep-litter laying quarters and records of their performance in terms of egg production and quality, food consumption, mortality and body weight gain were taken over a period of one year. The use of high stocking densities during the preceding rearing stage caused no impairment of the performance of layers kept in batteries, but was possibly responsible for a small decline in productivity of layers housed on deep litter.

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“…Consideration of bird density for optimum performance has been evaluated for many years (Tomhave and Seeger, 1945;Mehrhof and CSteen, 1948;Heishman et al, 1952;Hartung, 1955;Brooks et al, 1957Brooks et al, , 1958McCluskey and Johnson, 1958;Hansen and Becker, 1960;Moreng et al, 1961;Andrews and Goodwin, 1969; Bolton et al, 1972). Body weight gain and feed utilization have been the primary economic factors evaluated, although carcass quality has been considered in several of these studies, with an increase in breast blisters and poor feathering frequently observed as bird density increases (Proudfoot et ah, 1979;Scholtyssek and Gschwindt-Ensinger, 1983).…”

Section: Live Performancementioning

confidence: 98%

Effects of Bird Density on Salmonella Contamination of Prechill Carcasses

et al. 1992

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Two similar trials were conducted to evaluate the effects of bird density on Salmonella contamination of processed broilers. Commercial strain broiler chicks were reared in floor pens on new litter at densities of 557, 619, 697, 796, 929, and 1,115 cm2 per bird. Twenty percent of the chicks in each density were gavaged directly into the crop with .5 mL of 10(8) nalidixic-acid-resistant (NAR) Salmonella typhimurium on Day 2. Twenty percent of the uninoculated birds in each density category were processed at 42 days. Prechill carcasses were evaluated for NAR Salmonella incidence using the whole carcass rinse technique and a mechanical shaking device. The resulting NAR Salmonella contamination rates (from lowest to highest bird densities) were as follows, 55, 4.2, 35.7, 34.3, 88.9, and 20% in Trial 1; and 30, 20.8, 28.6, 50, 58.3, and 30% in Trial 2. A random sample of the prechill carcasses of gavaged birds indicated a contamination rate of 13.8% in Trial 1 and 61.1% in Trial 2. The NAR Salmonella contamination rates of the prechill carcasses did not appear to be affected by the bird densities evaluated in these trials. Feed intake and body weight at 42 days were adversely affected by the highest bird density, but feed utilization was not affected.

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The Relationship of Floor Space to Factors Influencing Broiler Growth

Cited by 14 publications

References 2 publications

Performance and Carcass Quality of Broilers Grown on Raised Floorings and Litter

Performance and Carcass Quality of Broilers Grown on Raised Floorings and Litter

The effect of varying stocking density on the development and subsequent laying performance of floor‐reared pullets

Effects of Bird Density on Salmonella Contamination of Prechill Carcasses

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