Effects Of Cottonseed Research Articles

Effects of Prepartum Whole Fuzzy Cottonseed or Whole Raw Soybean Supplementation on Response to Timed Artificial Insemination by Suckled Mature Beef Cows Following Ovulation Synchronization

<h2>ABSTRACT</h2> Cows (n = 188; average initial BW=579±54 kg) were stratified by BCS and BW and assigned to 3 supplementation treatments: whole raw soybeans (21.6% fat), whole fuzzy cottonseed (21.7% fat), or a 50:50 mixture of ground corn and soybean meal (2.6% fat; i.e., the control supplement). Supplements were fed daily at 1.8 kg/cow for 45 d before the first projected calving date. Supplementation was continued until calving. Ovulation was synchronized using the Cosynch + controlled internal drug release (CIDR) protocol (injection of GnRH 7 d before and 64h after a 7-d intravaginal CIDR insert containing 1.38g of progesterone) and a 25-mg injection of PGF_2α. Cows were inseminated artificially at 60 to 64h after CIDR removal. Eleven days after AI, cows were exposed to fertile bulls for natural-service breeding for 50 d. Conception to AI was assessed 33 d after AI; overall pregnancy rate was assessed 126 d after AI. Body weight of cows fed control or oilseed supplements was similar (<i>P</i> > 0.3) at calving, at initiation of ovulation synchronization, and at the end of the breeding season. Cottonseed-supplemented cows lost more BW and more BCS (<i>P</i> < 0.03) from the onset of supplementation until calving than those fed soybeans. Proportion of cows with estrus cycles was similar (<i>P</i> = 0.57) among treatments. Pregnancies per fixed-time AI and final pregnancy rate were similar (<i>P</i> ≥0.75) between control and oilseed-supplemented cows. Conversely, supplementation with cottonseed tended (<i>P</i> = 0.08) to increase pregnancies per timed AI (54 and 39% for cottonseed and soybeans, respectively) and increased (<i>P</i> = 0.03) final pregnancy rate compared with soybean-fed cows (100 and 93% for cottonseed and soybeans, respectively). In conclusion, cows supplemented with whole, fuzzy cottonseed tended to have a greater timed AI pregnancy rate and had a greater final pregnancy rate than cows supplemented with whole, raw soybeans. Effects of cottonseed and soybean supplementation on response to ovulation synchronization and fixed-time AI by beef cows warrant further study.

Supplementation of maize stover for Ethiopian Menz sheep: effects of cottonseed, noug (Guizotia abyssinica) or sunflower cake with or without maize on the intake, growth, apparent digestibility, nitrogen balance and excretion of purine derivatives

AbstractThirty-six male Ethiopian Menz sheep (9 to 22 months old, average live weight 15·8 (s.d. 1·84) kg), given maize stover (1·5 timesad libitum) supplemented with either 75 g cottonseed cake (CSC), 114 g noug cake (NGC;Guizotia abyssinica) or 112 g sunflower cake (SFC) with or without maize grain, were used in an 88-day study comprising growth and balance trials. The trials were undertaken according to a randomized-block design with a 2 × 3 factorial arrangement.There were no significant interactions (P&amp;gt; 0·05). Sheep consumed significantly more stover when supplemented with CSC compared with NGC and SFC (P&amp;lt; 0·05). Maize grain significantly increased organic matter intake (P&amp;lt; 0·001). Although CSC tended to support lower live-weight gains, the effect of protein was not significant. Maize grain increased live-weight gains (P&amp;lt; 0·01).Urinary nitrogen (N) excretions were similar between CSC and SFC but about 0·22 higher with NGC (P&amp;gt; 0·05). The faecal N output was 0·33 (P&amp;lt; 0·01) and 0·18 (P&amp;lt; 0·05) higher with CSC than with NGC and SFC respectively. Maize grain had no effect on any of the N-balance measurements.Cottonseed cake supported lower daily production of purine derivatives (PD) (P&amp;lt; 0·01), microbial purine (P &amp;lt; 0·01) and microbial protein (P&amp;lt; 0·01) than either NGC or SFC. Maize grain increased the daily excretion of total PD (P&amp;lt; 0·05), microbial purine (P&amp;lt; 0·05) and microbial protein (P&amp;lt; 0·05). Neither the protein source nor maize grain affected the efficiency of microbial protein synthesis. It was concluded that SFC was utilized more effectively both in terms of rumen microbial N synthesis, N retention and growth. The addition of a small amount of energy as crushed maize grain increased microbial N synthesis, N retention and live-weight gain.

The Effect of Cottonseed in the Ration on Percentage of Fat and Serum Solids Content of Milk

The Effect of Cottonseed in the Ration on Percentage of Fat and Serum Solids Content of Milk