Dietary Resin Acid Concentrate Improved Performance of Broiler Chickens and Litter Quality in Three Experiments.

Krzysztof Lipiński,Juhani Vuorenmaa,Hannele Kettunen,Katarzyna Sartowska-Żygowska,Magdalena Mazur-Kuśnirek

doi:10.3390/ani11113045

Krzysztof Lipiński, Juhani Vuorenmaa + Show 3 more

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https://doi.org/10.3390/ani11113045

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Abstract

Simple SummaryResin acids are antimicrobial and anti-inflammatory compounds derived from spruce and pine trees. In a previous study, in which a mixture of resin acids and fatty acids from pine and spruce trees was added to the feeds of broiler chickens, they grew heavier, and their footpads stayed in better condition. Here, three separate trials were conducted to study whether dietary resin acids without the fatty acids have the same effects on broiler chickens. Broiler chicken diets were amended with different dosages of a resin acid concentrate product. Bird weight gain increased, and the efficiency of broiler production was improved when the resin acid concentrate was added to the diet at 125–250 g/ton. The litter material of pens stayed drier in resin acid concentrate groups, which may indicate better intestinal condition of the birds. However, the footpad condition was unaffected by the experimental diets. The results suggest that the resin acid concentrate improves bird weight gain and the efficiency of broiler production. Therefore, the resin acid concentrate may be a promising feed additive for broiler chickens.Dietary coniferous resin acids have previously been suggested to support the intestinal integrity of broiler chickens by reducing mucosal collagen degradation. The present study examined the effects of resin acid concentrate (RAC) on broiler performance and litter quality. In trial 1, RAC was added to diets at 0, 125, 250, or 1250 g/ton, while in trials 2 and 3, RAC dosing was 0 or 175 g/ton. Bird weight, feed consumption, mortality, feed conversion ratio (FCR), European Efficiency Index (EEI), litter moisture, and footpad dermatitis (FPD) lesions were measured. In trial 1, RAC at 125 and 250 g/ton improved weight gain and EEI, while RAC at 1250 g/ton group did not differ from control. Feed consumption, FCR, FPD scores and mortality were similar in all treatments, but litter quality was improved by all doses of RAC. In trials 2 and 3, RAC increased the final weight of birds, improved FCR, EEI, and litter quality, but had no effects in other parameters. In summary, RAC at 125–250 g/ton improved bird performance and thus shows promise as a feed additive. The dryer litter in RAC treatments may suggest improved intestinal condition as a response to in-feed resin acids.

Highlights

During the past two decades, novel research methodologies have provided a lot of detailed information on the association of intestinal inflammation and suboptimal production performance in poultry and other farm animals [1,2,3]
Litter quality was significantly improved by RAC at 175 g/t (RAC175), compared with control, on day 14, but similar to control in days 28 and 35
For the first four weeks, feed conversion ratio (FCR) was similar for both treatments, but for days 1–35, FCR was significantly better for RAC175 group than for the control group (p < 0.01)

Summary

Introduction

During the past two decades, novel research methodologies have provided a lot of detailed information on the association of intestinal inflammation and suboptimal production performance in poultry and other farm animals [1,2,3]. The poultry industry has responded by developing feed supplements and additives with the potential to balance intestinal microbiota and support animal performance, such as organic acids, probiotics, prebiotics, and phytobiotics [5,6,7,8]. Amending diets with TOFA has improved the production performance of broiler chickens [9,10,11], turkeys [12], and sows [13]. Favorable changes in intestinal microbiota [11,13] may partly explain the better production performance of TOFA-treated farm animals

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