Rice and soy protein isolate in pre-starter diets for broilers

Abstract

Although most industries use a specific diet for the pre-starter phase, ingredients are used in the later phases, primarily corn and soybean meal, which at this stage do not have high digestibility. Three experiments : Exp : were carried out to evaluate the substitution of corn by white or parboiled rice : WR, PR : and the inclusion of 6% soy protein isolate : SPI : in pre-starter diets (1 to 7 d). In Exp 1 (1 to 21 d), WR, PR, and SPI were added to the diets until the birds were 21-day-old, whereas in Exps 2 and 3 (1 to 33 d), only until birds were 7-day-old. Birds were fed a basal diet based on corn and soybean meal until the end of the experimental period. In Exp 1, the coefficients of total tract apparent retention : CTTAR : of the pre-starter and the starter diets, ileal and jejunal digestibility of starch in the starter diets, and broiler performance were measured. Subsequently, the same pre-starter diets Exp 1 were evaluated in pellet (Exp 2) or mash (Exp 3) form and different oil percentage (Exp 2) or not (Exp 3). We hypothesized that the ingredients particle size (Exp 2) and fat content (Exp 3) could influence feed intake. There was no interaction among the evaluated factors (P > 0.05). Rice (WR or PR) promoted better results than corn in terms of CTTAR of dietary components, jejunal and ileal starch digestibility, and broiler performance (P < 0.01). In Exp 1, diets with 6% SPI presented better CTTAR, except Nitrogen ( N: ), but lower feed intake, which negatively affected broiler performance (P < 0.01). In Exps 1, 2, and 3, the inclusion of SPI did not improve broiler performance (P > 0.05), so that SPI may not be the best choice for pre-starter diets. The study also suggests that better growth performance and nutrient digestibility can be obtained in broiler chickens if corn is replaced by rice in pre-starter diets.

Dietary rice improves growth performance, mucosal enzyme activities and plasma urea nitrogen in weaning piglets

“…Mateos et al (2006Mateos et al ( , 2007, Vicente et al (2008) and Parera et al (2010) reported that feeding rice to weaning pigs resulted in a higher average daily weight gain (ADG) and average daily feed intake (ADFI) compared with feeding corn. Similar results were also reported in chicks (Gonzalez-Alvarade et al 2007;Jimenez-Moreno et al 2009;Ebling et al 2015). Furthermore, rice-based feeds have been shown to reduce the occurrence of diarrhea in weaning piglets (Pluske et al 1996(Pluske et al , 2003.…”

“…; Ebling et al . ). Furthermore, rice‐based feeds have been shown to reduce the occurrence of diarrhea in weaning piglets (Pluske et al .…”

Effects of a rice diet and phytase addition on growth performance, tissue weights, phosphorus and nitrogen retention, and on liver threonine dehydrogenase, malic enzyme and fatty acid synthase activities in broiler chicks

“…; Ebling et al . ) compared to dietary corn. Feeding rice to pigs and chicks is a common practice in many countries, but not in Japan.…”

“…Ebling et al . () reported that feeding white or parboiled rice to broiler chicks improved their growth performance. However, limited information is available on the use of rice as a feedstuff for broiler chicks.…”

Effects of soybean meal substitution with isolated soya protein in pre-starter diet on immune system and performance of broiler chickens

“…Statistical analysis of the obtained data revealed that inclusion of ISP instead of SBM at 10% significantly reduced FCR in comparison to birds fed control diet in the periods 1-7 and 1-24 days of age; the 30% substitution caused further FCR decrease in comparison to 10% substitution, but neither 10 nor 30% differ from 20% substitution. Ebling et al (2015) reported that diets with 6% ISP increased the coefficients of total tract apparent retention of dry…”