Interaction of Strain, Density and Ration With Two Light Systems on Broiler Performance

Abstract

Two experiments were conducted to determine termined in experiment 1. Birds grown on the effect of continuous ana intermittenl ir ii ioiir-itt.tiiriiiii-ri;'ij;;.. mortarity and beton and 3 hr ofl) Iieht treatments and thb in-ter-feed effi;ia;t a;"those on continuous fluence of straii, dinsity ""a *ti"" ."'pii. ifu;K";A;iltr"rftiel, at 7 weeks of aee tormance of broilers maint-ained olr "uctt tffit wis not rigdfi";;iii oihti"ot for the two lisht treatment' Three thousand and six hr;Af"d fteatme,nts; however, significant interactidns broilers of two strains were srown with '-riit *";J -o-dio;a iJi lir"iii x right, density y 11119 !.!a7_m, of.floor spaie per bird in ex_ lisd qd;;6n'i fien'iluent treatments did penment 1. Three thousand broilers from one ;;t"ff;-tG;G;ft; of grade A carcasses strain were grown wirh 0-09-3^^mt;i fl;;;;p;i "rrriiigni; si;;ile"iaiion naa a simificant per bird in experiment z; goo-riioiw-ere-iJJ ;ff.;i-;r--7_;;f ti,iv ir.i+t, as did bird each of five test rations. B.dt;;jsiI;;;;: ir"r.itrll"'tdii-uirii?"t"t"ined ar 0.093 m, tality and feed efficienry wer6 calc-ulated -in *ere fri,auier una-rr"o?irigt"r pe.rcentage of both experiments and staughrer g"oii*'..-oi,: grade A carcasses than birds ato.o47 mz.

Feed Texture and Light Treatment Effects on the Performance of Chicken Broilers

“…Body weight of broilers were similar whether grown under intermittent or continuous (23L:1D) lighting which substantiates work reported by Buckland et al (1971) and Buckland et al (1973), although in an earlier report Buckland and Hill (1970) reported that broilers grown on intermittent lighting exhibited heav- The effect of intermittent vs. continuous lighting on feed conversion appears to be controversial; Buckland et al (1971) reported intermittent lighting resulted in improved feed conversion but was unable to repeat this in subsequent experimentation (Buckland et al, 1973). In the experiment reported here broilers grown under intermittent lighting exhibited the best feed conversion but the difference was not significant at the 5% level.…”

Effects of increasing photoperiod length on performance and health of broiler chickens

“…Shorter day-length improves bird health and reduces stress but also results in slower growth rate than continuous light (Freeman et al, 1981;Robbins et al, 1984;Whitley et ah, 1984). Intermittent lighting programmes, which utilise repeated light and dark periods within a normal 24 h day have also been shown to improve bird health while maintaining equal or superior growth and food conversion to birds given continuous 22 H. L. CLASSEN, C. RIDDELL AND F. E. ROBINSON light (Buckland et al, 1971(Buckland et al, , 1973(Buckland et al, , 1976Ononiwu et al, 1979;Malone et al, 1980a, b;Wilson et al, 1984).…”

Response of Broilers to Variations in Waterer, Feeder, and Floor Space Under Continuous and Intermittent Photoperiods

“…A single commercial broiler Gore et al (1969), Buckland et al (1971), genotype was used in each experiment, but the and others have reported on broiler perforrn-strain used in experiment 1 was not the same ance rerative to different space and photo-il'. *: *:1'J ffikl"Tt:.iT'*|i;""*il1';ffi'.i: period treatments' -ing that consisted of 4g pens, each 5.1g a 3.05 There appears, however, to be a lack of m, with feed and service-room located midway information on the interrelated effects of in the building.…”