Effects of Zinc Glycine Chelate on Growth, Hematological, and Immunological Characteristics in Broilers

Abstract

Three hundred sixty healthy Ross x Ross 1-day-old broilers were used to study the effects of zinc glycine chelate (Zn-Gly) on growth performance, hematological, and immunological characteristics. All broilers were randomly assigned into six treatments. Diets were as follows: (1) control (containing 29.3 mg Zn kg(-1) basic diet [0-3 weeks] and 27.8 mg Zn kg(-1) [4-6 weeks]); (2) basic diet plus 30 mg Zn kg(-1) from Zn-Gly; (3) basic diet plus 60 mg Zn kg(-1) from Zn-Gly; (4) basic diet plus 90 mg Zn kg(-1) from Zn-Gly; (5) basic diet plus 120 mg Zn kg(-1) from Zn-Gly; (6) positive control, basic diet plus 120 mg Zn kg(-1) from zinc sulfate (ZnSO(4)). After the 21- and 42-day feeding trials, the results showed that both of Zn-Gly and ZnSO(4) could improve the growth performance of broilers, with the greatest average daily feed intake observed in the broilers fed 90 mg Zn kg(-1) from Zn-Gly, but the greatest average daily gain observed with 120 mg Zn kg(-1) from Zn-Gly (0-3 weeks) and 90 mg Zn kg(-1) from Zn-Gly (4-6 weeks). Adding additional Zn-Gly improved the levels of immunoglobulins (IgA, IgM, and IgG) and the contents of total protein and Ca in serum and increased the immune organs index especially with 90 mg Zn kg(-1) as Zn-Gly. However, there were no significant differences in responses to complements (C3 and C4) and albumin in serum among the treatments.

The effect of prebiotic and organic zinc alone and in combination in broiler diets on the performance and some blood parameters

“…This increase was consistent with the studies of Feng et al (2010) who used 90 mg/kg Zn-Gly in broiler and Bülbül and Küçükersan (2004) who used 140 mg/kg Znproteinat in laying hens and suggesting an increase in total plasma protein. In our study, serum Zn and Fe levels were lower in control group than those in OZn and MOS+OZn groups (P<0.001).…”

The Effect of Inorganic or Organic Zinc on the Morphology of the Intestine in Broiler Chickens

“…Zinc is known to influence the intestinal morphology and improve absorptive capacity, and enhance growth performance [5,6]. Moreover, zinc is essential for cell proliferation and differentiation, especially for the regulation of DNA synthesis and mitosis [2).…”

“…Supplementation of Zn in diets also improves intestinal morphology by increasing the villus height and reducing the crypt depth in animals [4,10]. criterion [5,12]. However, there are several reports that demonstrate that higher Zn levels [60-180 ppm] produce better immune growth performance and intestinal function of broiler chickens [13,14].…”

The Use of Organic Zinc in Poultry Nutrition: Review

“…Ortalama canlı ağırlık kazancı ise 0-3. haftalar ve 4-6. haftalar arasında sırasıyla 120 ve 90 mg/kg Zn-Glisin verilen gruplarda en yüksek olmuştur (Tablo 2). 35 Farklı çinko kaynaklarının yumurta tavuklarında etkilerinin araştırıldığı bir çalışmada, 10 hafta süresince deneme gruplarına kg diyette 140 mg çinko sağlayacak şekilde sırasıyla çinko klorid, çinko sülfat, ZnO, çinko karbonat ve ZnPro eklenmiştir. Son canlı ağırlıklar en düşük kontrol ve ZnO verilen grupta tespit edilmiş fakat diğer gruplar arasında önemli bir farka rastlanmamıştır.…”

“…35,39 Damızlık broylerlerde, 32-48. haftalar arasını kapsayan 16 haftalık bir denemede, organik çinko kullanımının bağışıklık yanıtı üzerine etkisini araş-tırmak amacıyla 40 ppm Zn-sülfat içeren bazal rasyona sırasıyla 20, 40 ve 60 ppm Zn-metiyonin ilavesi yapılmış ve hayvanlarda hücresel bağışıklık tespiti için kırmızı gerdan uzantısına fitohemaglü-tinin-P [Phytohaemaglutinin-P (PHP-P)] enjeksiyonu yapılarak kutanöz bazofilik hipersensitivite (CBH) testi ile deri kalınlığı ölçülmüş, humoral bağışıklık için de test antijen olarak koyun kırmızı kan hücreleri [sheep red blood cells (SRBC)]'ne karşı oluşan antikor yanıt analiz edilmiştir. Hayvanların PHP-P'ye karşı hücresel bağışıklık yanıtı 60 ppm Zn-metiyonin verilen grupta diğer gruplara göre önemli derecede yüksek bulunmuştur.…”