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The aim of this study was to check the effect of photoperiod (lightning duration) on dry matter intake (DMI), water intake, average daily gain (ADG) and body condition score of Sahiwal heifers. For this purpose, a total of nine yearling Sahiwal heifers having similar age, body weight and height were selected and divided into three groups (A, B and C) in such a way that each group had three heifers. Group A was allotted short day photoperiod (8 h Light: 16 h Dark), Group B was maintained on natural photoperiod and Group C was kept on long day photoperiod (16 h Light: 8 h Dark). The duration of experimental trial was from December to February (90 days) and during these months the duration of natural photoperiod varies from 8 to 12 hours. Results of this study showed that the photoperiod manipulation had a significant (p0.10) however, body measurements were numerically greater in heifers exposed to long-day photoperiod than those on short-day photoperiod. Based on results, it is concluded that supplemental lighting had a significant effect on the growth performance of Sahiwal cattle heifers.
Muhammad Riaz, Ghayyoor Ahmad, Muhammad Aziz ur Rahman. (2021) EFFECT OF PHOTOPERIOD ON THE GROWTH PERFORMANCE OF SAHIWAL CATTLE HEIFERS, Pakistan Journal of Agricultural Sciences, Volume 58, Issue 3.
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