|
|
||||||||
California State Polytechnic University, Pomona 91768
Abstract
Twelve grade weanling fillies were blocked by weight and randomly assigned to experimental diets containing 0, 10 or 20% low gossypol cottonseed meal. The isolysine and isocaloric diets were balanced to meet NRC growth requirements for weanling horses. The following growth measurements were taken every 28 days during the 180-day trial: body weight, body length, withers height, hip height, knee height, hock height, heart girth circumference and cannon bone circumference. Average daily gains for the 0, 10 and 20% cottonseed meal groups were .72, .77 and .66 kg, respectively, while feed efficiencies were 10.8, 9.9 and 12.7 kg feed/kg gain. Neither of these two parameters was significantly affected by treatment. Blocking exhibited an effect on body weight (P<.01), heart girth circumference (P<.01), cannon bone circumference (P<.01) and body length (P<.05). There was a significant diet x time interaction for withers height and for cannon bone circumference. There were no apparent ill effects of the .04% free gossypol contained in the cottonseed meal. One filly contracted an illness not related to the experiment and was subsequently dropped from the trial. Data for this horse were generated according to the missing data formula for a completely randomized block.
1 This study was jointly funded by grants from the National Cottonseed Products Association, Memphis, TN, and the Cal Poly Equine Research Committee.
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |