Effect of heat and humidity on in situ rumen degradability of cottonseed

Main Article Content

A. Estrada
Oreste La O
J. J. Portillo
Rafael Segundo Herrera
Beatr?z I. Castro
F. G. Rios

Abstract

An in situ experiment was performed in the rumen to determine the DM and organic matter degradability of cottonseed, both normal and treated with heat and humidity. Four adult male sheep were used and fitted with rumen cannula. The samples were incubated for 3, 6, 9, 12, 24, 48, and 72 h in ventral position in the rumen. The values of potential degradability (a+b) varied from 56.4 up to 57.5, and from 86.59
up to 81.00 % for DM and CP of normal and treated seed, respectively. However, the c fraction, for DM and for CP, had better performance in the normal seed, compared with the treated with heat and humidity. The dynamics of rumen degradation evidenced increasing trend, from the first to the last incubation time, with differences (P < 0.01) in the treated and non-treated seeds. The chemical composition had adequate concentrations in this feed, with values up to 23.12 and 22.94 %, for CP in non-treated and treated seed meal, respectively. It was
concluded that by humidifying the seed, there is higher availability of CP and DM for the ruminant animals. Besides, there is an efficient and easy to use alternative in animal feeding, with important contribution of bypassing proteins for the different feeding systems. Further studies on metabolism and productive indicators are recommended to support these results.
Key words: cottonseed, degradability, DM, protein.

Article Details

How to Cite
Estrada, A., La O, O., Portillo, J. J., Herrera, R. S., Castro, B. I., & Rios, F. G. (2011). Effect of heat and humidity on in situ rumen degradability of cottonseed. Cuban Journal of Agricultural Science, 45(3). Retrieved from https://cjascience.com/index.php/CJAS/article/view/119
Section
Animal Science
Author Biographies

A. Estrada

Facultad de Medicina Veterinaria y Zootecnia, Universidad Aut?noma de Sinaloa, M?xico

Oreste La O

Instituto de Ciencia Animal, Apartado Postal 24, San Jos? de las Lajas, Mayabeque, Cuba

J. J. Portillo

Facultad de Medicina Veterinaria y Zootecnia, Universidad Aut?noma de Sinaloa, M?xico

Rafael Segundo Herrera

Instituto de Ciencia Animal, Apartado Postal 24, San Jos? de las Lajas, Mayabeque, Cuba

Beatr?z I. Castro

Instituto de Investigaci?n en Ciencias Veterinarias (UABC), Mexicali, Baja California 21100, M?xico

F. G. Rios

Facultad de Medicina Veterinaria y Zootecnia, Universidad Aut?noma de Sinaloa, M?xico