Heat stress reduces feed intake

 Resize text         Printer-friendly version of this article Printer-friendly version of this article

Attention to dry matter intake this summer — in addition to proper cow cooling — can help minimize the impact of heat stress on your cows’ dry matter intake.

According to research conducted at the University of Georgia Coastal Plain Experiment Station, Holstein cows exposed to extreme heat-stress conditions — those classified by a temperature-humidity index (THI) of 72 or greater — ate about 0.5 pounds less feed per day for every degree increase in THI, explains Joe West, dairy scientist at the University of Georgia Coastal Plain Experiment Station. Consequently, milk yield declined about 0.9 pounds per day for every degree increase in THI.

The following table describes the range of temperatures and relative humidity levels that result in a THI of 72 or 76:











TemperatureRelative HumidtyTHI
72 F100 %72
74 F80 %72
76 F60 %72
80 F35 %72
84 F15 %72
76 F100 %76
78 F80 %76
80 F70 %76
84 F45 %76
88 F25 %76


Comments (0) Leave a comment 

Name
e-Mail (required)
Location

Comment:

characters left


Farmall® C

From the feedlot to the pasture, the Case IH Farmall® C series tractors help you do more. Available in a range ... Read More

View all Products in this segment

View All Buyers Guides

)
Feedback Form
Leads to Insight