At the Remehue Research Station (INIA, Osorno) a study was conducted on summer supplements, to avoid a drop in the lactation curve. Eight cows were assigned to each of the following treatments:
I Grazing only.
II Grazing + 4 kg/cow/day of beet pulp (75%) and rapeseed bran (25%).
III Grazing + 20 kg/cow/day of kale.
The stocking rate was 2 cows/ha; cows were fed in a pasture (white clover-ryegrass), grazed rotationally, with 10 paddocks per treatment.
Available forage vafied from 1.200 to over 3.000 kg D.M./ha. Daily yield/cow, during the supplementation period, was 10.9, 12.1, and 11.8kg (4% fat corrected milk), for treatments I, II, and III, respectively.
Daily milk production, in the last 21 days of supplementation, was 7.4, 10.0, and 7.9 kg; treatment II was significantly higher (P 0.05).
During 35 days of control, after supplementation was discontinued, average production/cow/day, for each treatment, was 5.0, 7.3, and 6.1 kg. Treatment II was significantly higher than treatment I (P 0.05). Treatment I was superior to treatment III (8.69 Vs. 8.40%) in solids non fat, and there were no significant differences in fat content.
Daily live weight gains were 0.109, 0.329, and 0.349 kg, respectively, being significantly higher for treatments II and III. |
ChileanJAR
