Abstract
The aim of the first study was to determine the influence of the calf handling (restricted or full contact) and fenceline bull stimulation on performance of mothers and their calves. The aim of the second study was to determine the relative impact of calf-bull contact, comparing the result of restricted calf and no bull with that of fenceline calf contact and direct bull contact on the performance of mother buffaloes and their calves. In Experiment 1, 24 mother-calf dyads were allocated to three treatments: NCB (no calf-mother-bull contact), RC-FBC (restricted calf and fenceline bull contact) and FC-FBC (fenceline calf and fenceline bull contact). In Experiment 2, another 24 mother-calf dyads were allocated to two treatments: RC-NB (restricted calf and no bull contact) and FC-DBC (fenceline calf and direct bull contact). In Experiment 1, average daily gain (ADG) was greater in FC-FBC than RC-FBC and NCB calves (p<.05). Average dry matter intake (DMI) was greater in FC-FBC than RC-FBC and NCB calves. DMI of buffaloes was greater in FC-FBC than RC-FBC and NCB. Daily milk yield of buffaloes was more (p<.05) in FC-FBC (10.2 ± 0.2kg) than RC-FBC (8.4 ± 0.2kg) and RC-FBC (7.8 ± 0.2kg). There were no statistical differences observed in the interval from calving to first oestrus, first service, service period among three groups. In Experiment 2, ADG's and DMI were greater in FC-FBC calves than RC-FBC (p<.05). DMI of buffaloes was greater in FC-DBC than RC-NBC (p<.05). Daily milk yield of buffaloes was greater (p<.05) in FC-DBC (11.6 ± 0.2kg) than RC-NBC (8.3 ± 0.2kg). The first oestrus (51.5 ± 3.1 vs. 103.2 ± 7.2), days to first service (74.8 ± 3.5 vs.112.0 ± 7.6) and service period (78.8 ± 4.8 vs.118.9 ± 8.3 days) were lower (p< .05) in FC-DBC than RC-NBC buffaloes. The fenceline calf-mother contact increased the growth rate, FCR, and feeding efficiency of buffalo calves; reduced some stress responses and improved the productive performance of buffalo mothers. Further, mother-bull contact stimulated the post-partum reproductive performance of buffaloes in fenceline calf contact.
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