WATER MAGNETICALLY TREATED FOR LACTATING HOLSTEIN COWS

72 lactating Holstein cows were used to study the effect of the magnet ically treated water on the productive performance of a grazing dairy herd. Live weight, milk production and lactation were considered to di stribute the animals at random in two tretments: A) water without magn etic treatment and B) water magnetically treated. The animals grazed o n coast cross bermuda grass (Cynodon dactylon) with neither irrigation nor fertilization in only one group with an average availability of 1 0 kg DM intake/animal/day during the year of the study. The grazing sc hedule was afternoon-night (5 p.m. to a.m.). The cows were supplemente d with 1 kg centrate per cow/day and received mineral salts libitum an d roughage in the building during the season. Milk production and its fat content we statiscally analysed using a multiplicative mode (Mench aca 1978). Milk production values (8.51 8.01) was 0.5 litres higher (P < 0.01) in the group with magnetically treated water. Differences in fat content were nor found. The results show an increase in the produc tive level of these animals when water was magnetically treated.