Effect of peanut shell extract supplementation on the growth performance, carcass characteristics and meat quality of broilers

Narae  Han1   Byong Won  Lee2   Jung Min  Heo3   Samooel  Jung3   Mihyang  Kim1   Jin Young Lee1   Yu-Yong Lee1   Moon Seok  Kang1   Hyun-Joo Kim1,*   

1Department of Central Area Crop Science, National Institute of Crop Science, Rural Development Administration, Suwon 16613, Korea
2Department of Southern Area Crop Science, National Institute of Crop Science, Rural Development Administration, Miryang 50424, Korea
3Division of Animal and Dairy Science, Chungnam National University, Daejeon 34134, Korea


The present study investigated the effects of dietary supplementation of peanut shell extract on the growth performance and physiological properties of broiler chicks. Two diet energy levels (Positive and Negative) and four additives (0.0, 0.05, and 0.1% peanut shell extract and commercial antioxidant) were factorially arranged for eight treatments. The overall weight gain of the broilers was slightly improved at 0.05% for the antioxidant treatments regardless of the diet energy levels, but there was no statistical difference among the treatments (p > 0.05). The carcass characteristics of the broilers, such as cooking loss, crude protein content, antioxidant activity, and thiobarbituric acid reactive substances (TBARS) values, were improved by the feeding diets containing the 0.05% peanut shell extract. Furthermore, it was confirmed that the dietary supplementation of peanut shell extract did not have a negative effect on the immune responses of the broilers show by the lack of statistical differences in the liver and bursa Fabricious weight and cytokine level among the treatments. From the economic analysis, dietary supplementation of peanut shell extract significantly influenced the compensatory growth and food efficiency and, in turn, led to a decrease in the duration needed to reach 1.5 kg compared to the control. These results suggest the possibility that the peanut shell extract could be used as a functional feed additive by improving the growth performance and carcass characteristics with no detrimental effects on broilers.

Figures & Tables

Fig. 1. Pearson’s correlation coefficient (r) matrix from broilers characteristics and meat quality according to dietary supplementation of peanut shell extract. The analysis was performed using MetaboAnalyst 5.0 program with a distance measurement of Pearson’s correlation coefficient test. Blue (-1) to red (1) colors indicate negative and positive correlations between individual parameters, respectively. TBARS, thiobarbituric acid reactive substances; DPPH, 2,2-diphenyl-1-picrylhydrazyl.