Sunflower Meal Inclusion Rate and the Effect of Exogenous Enzymes on Growth Performance of Broiler Chickens

Abstract

The study examined the effect of de-hulled sunflower meal (SFM) inclusion rate and exogenous enzymes (EE) on broilers production performance. A four-feeding phase of pre-starter (1–9 d), grower (10–20 d), finisher (21–28 d) and post-finisher (29–35 d) was used with SFM included as low (BSL) and high (BSH) in all phases. BLS inclusion was 3% throughout phases and BSH inclusion was 7.5%, 10%, 13% and 13.5% for the 4-phases. Each SFM had a negative control (NC) (BSL− and BSH−) and positive (PC) (BSL+ and BSH+) control with additional 80 kcal Apparent Metabolizable Energy. Enzymes: xylanase (X), xylanase + beta-glucanase (XB), xylanase + beta-glucanase + protease (XBP) and xylanase + amylase + protease (XAP) were added to the NC and PC to give 6 treatments. Pen body weight gain (BWG) and feed intake (FI) were determined at 9, 20, 28 and 35 d and feed conversion ratio (FCR) was calculated accordingly. Diets were fed ad libitum to 1920 male Ross 308 broilers. Diet type, enzyme and diet by enzyme interactions were not significantly different amongst treatment diets. During the pre-starter and the grower phase, all studied parameters did not significantly differ from each other. All studied parameters were significantly influenced by enzyme addition and diet-type and enzyme interaction at 35 d except for diet type on FCR. Broilers fed BSH supplemented with XAP recorded the highest BWG (2.69 kg), whereas broiler chickens on BSL and supplemented with XBP recorded the lowest BWG (2.60 kg). SFM can be increased to 13% and 13.5% finisher and post-finisher diets without negatively affecting performance, and X and XAP enzymes can improve BWG of broilers grown to 35 d.

Responses of broiler chickens fed diets containing sunflower meal and wheat middlings pre-treated with enzymes

“…Therefore, NC and N25 could be economically integrated into the feed formulation for the BW gain comparable to PC. The by-products used in the current study are also readily available all year round and in large quantities in most developing countries (Alshelmani et al, 2021;Mbukwane et al, 2022) While the efficacy of any feed enzyme is based on performance data obtained from feeding trials (Aftab & Bedford, 2018), it is important to note that pre-treatment has been shown to improve digestibility in in vitro studies. For example, pre-treatment of maize-soybean-based diets with probiotics and subsequently, oven drying and pelleting them, has been shown to work and improve growth performance (Yeh et al, 2018).…”

“…They have been explored as the alternative source of protein and energy to replace a portion of soybean meal and maize, respectively (Alshelmani et al, 2021). The main challenges with using nonconventional feedstuffs are the anti-nutritional factors, such as non-starch polysaccharides (NSPs) (Mbukwane et al, 2022). The inclusion of ingredients that are high in dietary fibre in broiler chicken diets has been associated with gut health and growth performance problems (Hamedi et al, 2012).…”

Feeding sunflower meal with pullets and laying hens even at a 30% inclusion rate does not impair the ileal digestibility of most amino acids

“…SFM’s β-glucan, like the β-glucans found in cereals, can increase the viscosity of the gut content, which is associated with reduced nutrient absorption and imbalance of the microbiota in the small intestine ( 13 , 14 ). For this reason, NSP-degrading enzymes are used also if SFM-containing diets are provided ( 15 ). The positive effect of this addition on nutrient utilization and production traits has already been demonstrated by numerous studies ( 12 ).…”

Effect of different levels of Labazyme supplementation on production and biochemical traits in quail

“…Overall, the poultry industry is focused on improving nutrient utilization and disease resistance to reduce indirect costs, improve animal welfare, and reduce the environmental impact of poultry production. Improving poultry production through health and nutrient utilization requires a better understanding of the role of exogenous enzymes (Bischoff, 2011;Mbukwane et al, 2022). Thus, this study aimed to assess the impact of using Labazyme in quail feed on egg production, physiological parameters, and economics.…”