Las razas ovinas de carne alimentadas con dietas a base de nopal.

Abstract

The objective of this bibliographic review project was to study the main nopal-based diets used in the feeding of meat sheep breeds. This revision was done by searching for information in different scientific databases such as Scielo, Google Scholar, Repository of the Autonomous Agrarian University Antonio Narro of Mexico, degree works and, scientific articles. The variables consulted were daily dry matter intake (DMAI), daily weight gain (DWG), feed conversion ratio (FCR). The results showed that for sheep to have a higher dry matter intake, nopal should be partially included in the diet (25%), in addition to other ingredients to help in the palatability of the diet. For weight gain, the data obtained reflect the best result in the supply of 10% of chopped and scorched opuntia cladodes, obtaining a weight gain of 254 g/d; for feed conversion, the best result obtained is 3. 85 kg. with a diet of 45% concentrate and the remaining 55% corresponds to the proportion of nopal silage. The best diet based on nopal to be fed to meat sheep is silage in its proportion of (75% corn silage + 25% nopal silage and mesquite pods), plus concentrate (sorghum grain, soybean paste, dried distillers grains, tallow, minerals and, urea; which contains 20.0% CP and 2.9 Mcal. EM/kg); that is, for every 3.85 kg. of feed consumed, 1 kg. of acquired weight is obtained, with a gain of 250 grams per day. This study concluded that using a diet with the above specifications is an effective alternative for fattening sheep in areas where prickly pear cactus is available.