FR 28. Productive and reproductive survey in a ranch in flooded savannas ecosystem
To assess the reproductive and productive stage of a dual purpose herd (meat-milk) in bad drained savanna plains, Guárico State, Venezuela, one farm (206 ha) were monitored, with 70 zebu cows, fed with diet based on mainly native forage shrubs and crop residues (corn and bean). The calving data, and the milk yields (kg) were registered each 15 days, to evaluate the effect of delivery month (1...4 and 7 ... 12) and number of calving (NP) (two and more than two) on calving interval (IEP).NP resulted significant (P<.01); however cows calving during the dry months had a shorter IEP. The cows with two calved (VDP) showed longer IEP than those of more two calved (MDP) (585 vs 433 days). Furthermore, effect of calving month (MP), lactation month (ML) and NP on milk production (PL) were studied. The average of PL/cow/day was 2.03 ± 0.9 kg. MP and ML had significant effect (P<.01) on PL. The cows had calved earlier (January, February and March) had higher level of PL. Cows (VDP) produced less milk than the other one MDP.PL increased during the first two months of lactation to reduce gradually until the wean to 10 months.