Abstract
Observations of cows' standing and lying behaviors on two different sloped tie stall floors were performed. One of the stall floors was a commonly recommended conventional stall floor having downward slope from the front to the end. Another was a newly proposed stall floor having upward slope from the front to the center and counter slope in the rear side. The upward slope from the front to the center of the newly proposed stall floor was intended to prevent the cow's foreknee from slipping backward. The counter slope in the rear side was intended to prevent the cow's hind foot from slipping outward. The time ratio in a day of the lying position and the time needed for a standing up behavior were almost the same on the two stall floors. The time needed for a lying down behavior on the newly proposed stall floor was significantly shorter than that on the conventional stall floor in the three cows out of the four cows. The difference in the lasting time of lying position between the two stall floor was not clear. The plasma cortisol concentration was not significantly different between the two stall floors.
