Mürsel Özdoğan

Effect of gossypol on blood serum parameters and small intestinal morphology of male broilers

Summary In the present study, the effect of varied gossypol (GOSS) amounts was investigated on blood parameters, the digesta pH, villus height, villus width, and crypta depth, width of duodenum, jejunum and ileum. A total of one hundred eight Ross 308 male broilers were fed with four diet groups as follows: no gossypol (control), gossypol rate 62 mg/kg (GOSS 62), gossypol rate 124 mg/kg (GOSS 124) and gossypol rate 186 mg/kg (GOSS 186). The effect of used gossypol amounts on blood parameters was not found to be statistically significant. Increases in digesta pH values of jejunum and ileum with GOSS 186 diet group were found to be statistically significant. The results also indicated that, except duodenum villus height, there was no statistical difference effect of GOSS on epithelial cell thickness, villus height, villus width, crypta depth and crypta width of the duodenum, jejunum and ileum. There have been no clearly negative effects of higher gossypol amounts up to 186 mg/kg diets on these parameters.

Effect of different levels of crude glycerol on the morphology and some pathogenic bacteria of the small intestine in male broilers

The gut health of poultry is closely associated with feeds and feeding. The experiment was conducted to the effect of crude glycerol addition to diets of male broilers on the bacterial microflora and morphology of their small intestines (duodenum, jejunum and ileum). A total of 120 Ross 308 broiler chicks received diets containing 0% (GLY 0), 4% (GLY 4) or 8% (GLY 8) crude glycerol for 42 days. The presence of Coliform bacteria and Enterobacteria was reduced in the duodenal tract of the broilers of GLY 4 (P<0.001); however, the presence of Staphylococci/Micrococci in the GLY 8 was reduced relative to the other groups (P<0.001). The presence of Salmonella spp. decreased in conjunction with the increasing quantities of glycerol (P<0.001). Analysis of the data regarding gut morphology (epithelial cell thickness, villi length and width, and crypt length and width) indicated that the glycerol levels fed to the different groups of broilers represented statistically different results in the small intestine. In general, whereas the diet with 4% glycerol statistically affected the investigated parameters of the gut, the diet with 8% glycerol statistically affected some segments of the broiler intestines.

Antibiyotiklere Alternatif Olarak Kullanılan Yem Katkı Maddelerinin Kanatlılarda Mineral Emilimine ve Kemik Karakteristiklerine Etkileri:Derleme

Kalsiyum ve fosfor cesitli biyokimyasal olaylar ve kemik butunlugu icin esansiyel minerallerdir. Bu minerallerin rasyonlardaki yetersizligi veya dusuk emilimi, kanatli beslemede, ozellikle de yuksek verim kapasitesine sahip yumurtaci tavuklar ve etlik piliclerde mineral metabolizmasinda meydana gelen aksakliklar sonucunda yumurta kabugu kalitesi ve kemik ozelliklerinin bozulmasi gibi buyuk ekonomik kayiplara neden olan onemli bir sorundur. Bu nedenle, bu minerallerin bagirsaklardan emiliminin ve biyoyararliliginin en ust duzeye cikarilmasi, mineral metabolizmasi rahatsizliklarinin onlenmesinde pratik olabilir. Antibiyotikler hayvan beslemede uzun yillardir buyume destekleyici olarak yaygin sekilde kullanilmistir. Antibiyotiklerin yasaklanmasindan sonra, antibiyotiklere alternatif arayislari hiz kazanmistir. Probiyotikler, prebiyotikler ve organik asitler bu alternatiflerden bazilaridir. Yapilan bircok calismada probiyotiklerin, prebiyotiklerin ve organik asitlerin kanatlilarda mineral emilimini ve metabolizmasini gelistirdigi belirtilmistir. Bu derlemede, probiyotik, prebiyotik ve organik asitin kanatlilarda mineral emilimi ve kemik gelisimine olan etkileri uzerinde durulacaktir.

Growth rate, carcass characteristics and meat quality of growing lambs fed buckwheat or maize silage

Objective This study evaluated inclusion of buckwheat silage to the diet of growing lambs in terms of meat quality as compared to maize silage. Methods Buckwheat, rich in total phenols (TP, 33 g/kg dry matter [DM]), was harvested at the end of the milk stage and ensiled in 40 kg plastic bags after wilting (294 g/kg silage DM). A total of 18 growing lambs (21.6±1.2) were individually fed isonitrogenous and isoenergetic total mixed rations (TMR) for 75 d that either contained buckwheat or maize silage at DM proportions of 0.50. At the end of feeding trail all lambs were slaughtered to assess carcass characteristics and meat quality. Results Buckwheat silage increased (p<0.01) the DM intake of lambs as compared to maize silage, but had no effects (p>0.05) on live weight gain and feed efficiency. Carcass weight, dressing percentage, meat pH, water holding capacity, cooking loss, shear force (kg/cm2), and total viable bacteria count of meat did not differ (p>0.05) between the treatments. However, TP content of meat increased (p<0.001) by feeding buckwheat TMR. Feeding buckwheat TMR also decreased (p<0.05) the b* values of meat. Conclusion The results provide that buckwheat silage is palatable and could successfully include TMR of growing lambs with no adverse effects on performance, carcass and meat quality. Additionally, feeding buckwheat silage to lambs offers increased TP in meat.