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Consequences of Heat Stress during Early Summer on the Production Performance of Nili-Ravi Buffaloes under Subtropical Climatic Conditions

Younas U, Abdullah M, Bhatti J. A, Pasha T. N, Khalique A, Shahzad F, Junaid M, Manan A, Iqbal Z. M, Ali F.

Abstract


The study was conducted with an aim to evaluate the effect of heat stress on Nili-Ravi buffalo production performance during early summer (March-April) under sub-tropical climate of Pakistan. The research was conducted at Buffalo Research Institute (BRI), Livestock Experiment Station (LES), Distt. Kasur, Punjab. Nili-Ravi buffaloes (n=20) were selected with close parities (3rd, 4th, 5th and 6th) and same milk production. Stage of lactation was early for all buffaloes. Four treatment groups were made with 5 buffaloes in each group. Group A (control) was kept under roof shade only; B given anti-stress supplement (Sacchromyces Cervisae); C under ceiling fans and group D buffaloes were kept under showers with fans. The ANOVA method was used for data analysis under complete randomized design (CRD). The temperature humidity index (THI) was noted as 77.0. Milk production (MP) was highest (P<0.01) in group D (8.37±0.08) whereas, lowest in group A (7.97±0.10). Highest dry matter intake (DMI; P<0.01) was observed in group D (15.8±0.11 kg) followed by C (15.6±0.09 kg), B (14.5±0.12 kg) and A (14.3±0.11 kg). Non-significant differences (P>0.01) among various treatment groups for water intake (WI; liter) were observed. Group D buffaloes showed high feed intake time and water intake time (minutes; P<0.01) as compared to other treatment groups. Cost per liter of milk production (PKR) was lower in case of control group. In conclusion, control group A respond well in terms of cost per liter of milk production however gross margin was same for group A and group D.

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