Nutritional Evaluation of Some Unconventional Dietary Energy Sources in Ruminants Rations

Abstract

hirty five Ossimi male lambs with an average LBW 35 Kg were divided randomly into five nutritional groups for 195 days fattening trial. Five iso-caloric and iso-nitrogenous rations based mainly on yellow corn, grease and biscuit residuals were tested. The control ration (R1) based mainly on 45% corn grains (C); (R2) 30% corn and 6.5% grease (G); (R3) 15% corn, 15% bakery by-product (DBP) and 6.5% grease; (R4) 15% corn and 30% (DBP), while R5 was 45% (DBP). Results indicated that; lambs fed rations based mainly on (DBP) and (G) showed higher (p<0.05) DM and OM digestibility. Highest (CP) digestibility (p<0.05) was shown by lambs fed diet contained 30% DBP, however the lowest (P<0.05) CP digestibility was obtained by R5. Results of CF digestibility pointed out to insignificant differences among different experimental rations. Grease and (DBP) supplemented groups recorded higher (P<0.05) EE digestibility. Insignificant differences among different groups, neither in daily nitrogen intake nor in nitrogen retention (g/h/d). Four hrs. post feeding; higher (P<0.05) ruminal pH values were shown by lambs fed ration contained grease, while the control recorded the lowest one, but the highest (P<0.05) NH3-N value. Although, different experimental rations indicated insignificant NH3-N concentration. Grease rations showed lower (P<0.05) TVFA's, however the control indicated higher (P<0.05) value. Different experimental groups indicated insignificant LBW gain, while animals fed ration contained 45% (DBP) recorded the best (P<0.05) feed conversion ratio.

Contenido mineral y de nutrientes de ensilados de rastrojo de maíz con excretas pecuarias y subproductos ricos en carbohidratos

“…La melaza de caña tiene alta concentración de carbohidratos (So et al, 2020) y minerales (ppm): Mn (18), Zn (34), Cu (4.9), Bo (3), Co (0.6) y Fe (115) (NASEM, 2016;Senthilkumar et al, 2016;Tendonkeng et al, 2018). La melaza de caña (Trujillo et al, 2014) y los subproductos de panadería pueden ser usados como fuente carbohidratos rápidamente fermentables en ensilados (França et al, 2012;Mahmoud et al, 2017;Salama et al, 2019). En México, las regulaciones sobre los residuos de origen pecuario se acotan al manejo de las descargas en cuerpos de agua y sobre bienes nacionales (Pinos-Rodríguez et al, 2012), así como a la sanidad e inocuidad agroalimentaria de productos agrícolas (Acevedo et al, 2017).…”