As shown in Table 1 , the BMD of the birds in both the control group and the 1 h/day UVB-LED treatment group tended to decease over the duration, while that in both the 2 h/day and the 3 h/day UVB-LED treatment groups showed an increasing trend over the exposure duration.
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Effects of B-Wave Ultraviolet Supplementation Using Light-Emitting Diodes on Caged Laying Hens during the Later Phase of the Laying Cycle.
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