Effects of supplemental feeding interval on adult cows in western Texas.

摘要: Two experiments involving Brangus and Hereford × cows (3 to 10 yr) were conducted at four locations in western Texas determine the effects of supplemental feeding interval on serum urea nitrogen (SUN) patterns, intake supplement forage, winter changes live body weight condition score. Treatments control (Control;- no feed) equivalent of.91 kg/d cottonseed meal (CSM) fed daily (Daily), three times per week (3T/WK), or one time (WK). At each location, pasture group was given all treatments (four cows/treatment) using Calan gates. In Exp. 1, 1994-95, blood samples obtained for determining SUN during last study. Experiment 2, 1995-96, included both an individually herd additional herds location that group-fed treatments. 2 estimates intakes CSM forage herds. A bolus containing chromium (Cr-bolus) used estimate fecal output cows. double marker technique total (Yb) Data initial final cow weights scores (Exp. 1 2), patterns 1), supplement, 2). Feeding range increased concentrations reduced losses score tended decrease by approximate amount Generally, providing as infrequently once compared with effective supplementation. For cows, intake, change more variable within groups than when less frequently. These data indicate can be nutrition management adult grazing native range.