Nutrients deposition and energy utilization in slow-growing broilers fed with organic diets containing graded nutrient concentration

Carrasco, S.; Bellof, Gerhard; Schmidt, Eggert

doi:10.1016/j.livsci.2013.12.028

Cited by 4 publications

(2 citation statements)

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“…Comparable results with diets reduced in CP and enriched in dietary fiber were reported for laying hens (Roberts et al, 2007). As our present results and those of Carrasco et al (2014) indicate, these effects are not necessarily due to improved amino acid profiles of the low-CP diets. This suggests that it is possible to reduce feed CP in broiler diets down to about 190 g kg −1 DM without resulting in reduced performance and efficiency.…”

Section: Resultssupporting

confidence: 84%

“…However, the lower CP concentration in the AlfPea and PeaAlf diets, suggests that the efficiency based on feed CP might be higher with these diets compared with the control. At generally lower dietary CP concentrations, Carrasco et al (2014) also found no effect of diets with decreasing CP contents including decreasing levels of lysine (from 8.9 to 7.3) and methionine (from 3.4 to 2.7) on growth and protein deposition in slow-growing broiler chickens. Comparable results with diets reduced in CP and enriched in dietary fiber were reported for laying hens (Roberts et al, 2007).…”

Section: Resultsmentioning

confidence: 97%

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Insect and legume-based protein sources to replace soybean cake in an organic broiler diet: Effects on growth performance and physical meat quality

Leiber

Gelencsér

Stamer

et al. 2015

Renew. Agric. Food Syst.

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Protein sources other than soybean for the diets of poultry are needed for agricultural systems in temperate regions to help avoid some negative social and ecological impacts of large-scale soybean imports from overseas. The aim of the present study was to test the suitability of alternative protein sources in diets for slow-growing organic broiler chicken. Four experimental broiler diets were tested against a commercial feed for organic broiler chicken fattening (control), containing 255 g kg−1 soybean cake. Each experimental diet was based on the control diet, but 130 g kg−1 of soybean cake was replaced with alternative feeds. The diet ‘HermAlf’ contained 78 g kg−1 Hermetia meal (dried larvae of the black soldier fly, Hermetia illucens) and 52 g kg−1 alfalfa (Medicago sativa) meal. Diet ‘HermPea’ contained 78 g kg−1 Hermetia meal and 52 g kg−1 pea (Pisum sativum) groats. Diet ‘AlfPea’ contained 78 g kg−1 alfalfa meal and 52 g kg−1 pea groats. Diet ‘PeaAlf’ contained 78 g kg−1 pea groats and 52 g kg−1 alfalfa meal. Both diets containing Hermetia meal had the same amount of crude protein (CP) concentration as the control, while CP concentration was lower in diet AlfPea (by 2.7%) and in diet PeaAlf (by 3.5%) compared with the control. Over the course of the experiment, 15 broilers each (slow-growing Hubbard S757) were fattened with one of the five diets ad libitum from days 7 to 82. Additionally, all broilers received water and wheat grains (Triticum aestivum) ad libitum. Feed intake was measured by group. Daily gains, live weights, carcass weights and meat quality were analyzed individually. Compared with the control, feed intake, daily weight gain, carcass weights and feed efficiency were equivalent for all experimental diets. Regarding quality parameters, only cooking loss was increased with the HermPea diet compared with the control. The results indicate that the alternative feeds tested could replace part of the soybean products in broiler diets while achieving equivalent feed efficiency and product quality.

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Section: Resultssupporting

confidence: 84%

Section: Resultsmentioning

confidence: 97%