The potential effect of temperature-humidity index on productive and reproductive performance of buffaloes with different genotypes under hot conditions

作者：Nasr Mohammed A F^*

来源：Environmental Science and Pollution Research, 2017, 24(22): 18073-18082.

DOI：10.1007/s11356-017-9450-2

• Risk factors
• Temperature-humidity index
• Egyptian buffaloes
• Italian buffaloes
• Productive performance
• Reproductive indices

The current study was aimed to investigate the impact of THI on productive and reproductive indices of PE and F-1 crosses (50% PE and 50% Italian buffaloes) and back crosses (BC) (75% PE and 25% Italian buffaloes) under hot conditions. In this study, 8385 records used PE (1914, 1518, and 1737), F-1 (387, 447, and 657), and BC (495, 585, and 645) for low, medium, and high THI, respectively. The high THI reduced the conception rate after first insemination in PE, F-1, and BC ((odds ratio, OR) = 1.187, P = 0.007; 2.361, < 0.0001 and 1.603, < 0.0001, respectively) when compared with low THI. But, stillbirth and calving condition were not significantly influenced by different THI levels in BC and F-1. BC was more bearable to the harsh environment; they possessed the highest incidence of conception after first insemination (72.70, 72.60, and 62.40%), producing live calves (98.50, 100, and 99.40%) with easy calving condition (98.50, 100, and 99.40%) when compared to PE and F-1 at different levels of THI, respectively. The average daily milk yield and peak of milk production were decreased in PE (4.02 and 5.12%), BC (13.33 and 10.95%), and F-1 (25.29 and 12.20%) from low to high THI. However, BC revealed no significant changes in days open, dry period, calving interval, gestation length, service per conception, and the first service post-partum at different levels of THI when compared with PE and F-1. Therefore, rearing BC is recommended for improving buffalo productive and reproductive performance under hot conditions.

• 出版日期2017-8