Effects of Continuous and Intermittent Light on Broilers Cold Stressed as Embryos

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.…”

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

“…age were s]ighlly heavier. This could be due to the different strains used, but is more likely due to differences in management, as outlined by Buckland and Hill (1970 i"O""J morthity due to"a specific diiease or whother the effect was non-specific' if *ur concludei, from the'results of experiments 1 and Z, that the effect was pr"i"Uf' """-rp""ifl" because, generally, htermittent light reduced mortality for 'aifi"r"ni reason-" in the two expeiiments. The exceptions to this were with respect tr p"ir.i.…”

“…rn reviewing,the literature on the effects of continuous and intermittent light for qrowing chickens, Buckland and Hill (1970) reported trrat utout half the studies showed that chickens grown on continuous light'were heavier, *hlt" the remainder suggested that selected intermittent light and iark periods .ttoh4 -u*mize the use of-nutrients for growth. This inconiistency in results cotrld be due to the uss of 9ffi"tj"t strains, rations,and-management conditions such as tlmperature and bird density.…”

The Effect of Intermittent Lighting Programmes on the Production of Market Chickens and Turkeys

“…Utilizing two strains of birds, one of which was a commercial broiler and had nearly twice the 8 week body weight of the other which was a control strain, Buckland and Hill (1970) reported that birds from both strains grown on continuous light to one week of age and on 1L:3D from 1 to 8 weeks of age had significantly greater 8 week body weight than birds grown on continuous light for the entire 8 week period. In further work comparing 24L:OD and lL:3D, Buckland et al (1971) examined the interaction of lighting programme with strain (two commercial broiler crosses), housing density (0.093m2 and 0.047m2 of floor space per bird), and ration (5 rations varying from 17.5 to 22.5% protein) on 7 week body weight.…”