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http://dx.doi.org/10.5536/KJPS.2007.34.1.015

Effects of Feeding Softwood By-products or Extract on Growth Performance, Intestinal Organs and Cecal Microbes in Organic Broiler Chicks  

Choe, H.S. (Department of Animal Resources & Biotechnology, College of Agriculture & Life Science, Chonbuk National University)
Part, J.H. (Department of Animal Resources & Biotechnology, College of Agriculture & Life Science, Chonbuk National University)
Publication Information
Korean Journal of Poultry Science / v.34, no.1, 2007 , pp. 15-21 More about this Journal
Abstract
This study was conducted to evaluate the effects of dietary softwood by-products extract on growth performance, organ weight and intestinal microbes in organic broiler chicks. Five treatments were assigned to 200 broiler chicks with four replication, allocating 10 broiler chicks in each replication. Dietary treatments included control(Organic diet), +C(Organic diet + antibiotics), T1(Organic diet + softwood by-product powder 3.0%), T2(Organic diet + softwood by-product extract 0.05%) and T3(Organic diet + softwood by-product extract 0.1%). Body weight gain was higher in +C and T3 for overall period than control and T1. Feed efficiency of were slightly improved in +C and T3 groups compared with that of control and T1. The small intestine weight tended to be higher in control and +C, but it's length showed high in only T1 group. Gizzard weight was significantly higher in T2 compared with other treatments(P<0.05). In contrast, spleen weight was significantly lower in control group(P<0.05), whereas the weight of cecum and liver were not significantly different by dietary treatment. Intestinal microflora was significantly lower or/and seemed to be low in softwood by-products treatment groups than control. Digestibility of energy and protein were statistically lower in control and T1 than other treatments(P<0.05). The IgG concentration of birds fed antibiotics, softwood by-product extract was higher than control and T1, but was no significance. The results of this experiments indicated that softwood by-product extract would be possible to apply for the feed additive in organic broiler diets.
Keywords
softwood by-products; organic broiler chicks; performance; organ weight; cecum microflora;
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Times Cited By KSCI : 8  (Citation Analysis)
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