LACTATIONAL RESPONSES OF HIGH PRODUCING DAIRY COWS FED SUPPLEMENTAL FAT FROM WHOLE COTTONSEEDs

BAKR, A.A.

doi:10.21608/vmjg.1998.377360

LACTATIONAL RESPONSES OF HIGH PRODUCING DAIRY COWS FED SUPPLEMENTAL FAT FROM WHOLE COTTONSEEDs

Author

A.A. BAKR

Hygiene and Preventive Medicine Department, Faculty of Veterinary Medicine Kafr EL- Sheikh Tanta University

10.21608/vmjg.1998.377360

Abstract

Responses to supplemental fat from 7.5% or 15% Whole cottonseeds were evaluated with 12 multiparous Holstein cows. Based on parity, body weight ,milk yield, milk composition and days in milk production cows were assigned randomly to three groups (4 each). Dietary treatments were basal control diet which contained(on dry matter basis) 40% forages (20% corn silage and 20% berseem),and 60 % concentrate mixture(primarily,corn, soybean meal,and wheat bran),or the basal diet plus 7.5 % or 15% whole cottonseeds in relacement portions of corn,soybean meal, and wheat bran in concentrate mixture. The diets formulated to be isonitrogenous,and varied in fat and energy density. The experimental period lasted for 60 days. Milk yield increased with 15% whole cottonseed diet. Yield of 4% FCM was increased with 7.5% and 15% whole cottonseeds. Milk fat percentage and yield were higher (p < 0.05) with diet Supplemented with fat. Milk protein percentage decreased (p< 0.05) with fat supplementation.But milk protein yield was not altered by amount of fat supplementation .Dry matter intake and body weight changes were not affected by supplemental fat. Whole cottonseed (7.5 % or 15 %) can be used as dietary fat supplement to increase milk and fat yield.

Main Subjects