RELATIONS BETWEEN FEEDING, DAIRY PERFORMANCE, FERTILITY AND SOME BLOOD PARAMETERS IN GERMAN FRIESIAN COWS

The relations between feed intake, dairy performance, some metabolic p arameters and fertility have been studied in 40 German Friesian Cows o n the university farm in Oberschleissheim. A view in regard of the dif ferent rates of feed intake and metabolic parameters is given. The rel ationships between feed intake, energy-balance, metabolic parameters, liver-metabolism and fertility are discussed. A positive correlation w as found between feed intake ante partum and the service period. This can be explained as follows : high-energy basic feed causing high ener gy-intake ante partum leads to the storage of body-fat. As a consequen ce, increasing fat-mobilisation post partum overloads on the liver-met abolism, thus causing a decline in fertility.