The comparision of some traits in organic and conventional dairy cattle breeding enterprises [Organik ve konvansiyonel süt siğiri yetiştiriciliği yapilan işletmelerde bazi özelliklerin karşilaştirilmasi]

Fertility, milk yield and quality and health status of Holstein cattle reared at organic and conventional conditions were investigated. The research was conducted in two private farms, organic and conventional, in Aydın province where Mediterranean climate prevails. Data were collected from farm records and visiting fortnightly. The milk samples from bulk tank were used for milk quality a fortnightly basis, and for metals and aflatoxin M1 a monthly basis. The means in organic and conventional herds were 608.4±4.25 and 584.0±7.56 days (p0.05), respectively. Pb was not determined in both herd samples. The mean incidences in organic and conventional herds were 5.49 and 16.6% (p<0.01) for mastitis; 1.09 and 29.1% (p<0.001) for pneumonia; 6.59 and 23.6% (p