Data or statistical facts on the situation and perspectives of agri-food systems and the impact of policies
Proportion of cows with first, second, or more calvings in El Salvador: First-calf cows: 40%; Second-calf cows: 26%; Three-calf or more cows: 34% (Castro-Montoya, 2023)
Retained placenta was observed in 304 cases out of 2685 available records, IUI were observed in 1397 cases out of 3320 records, and mastitis occurrence before the median frst service was observed in 511 cows out of 3290 records (Castro-Montoya et al., 2022)
In El Salvador, days to first service: 76.3 Services per conception: 3.12 Days open: 187.5 (Castro-Montoya et al., 2022)
In El Salvador, herd median (average number of milking cows in parentheses): Dairy: 285 (131) Beef cattle: 8.5 (0) Dual-purpose cattle: -Large extensions: 69 (21.8) -Medium extensions: 51 (17.5) -Small extensions: 23 (7.8) -Subsistence - high density: 15 (4.7) -Subsistence - low density: 10 (3.6) (IICA, 2024)
In El Salvador, for dairy farming: 21.8 L/d In dual purpose large extensions: 5.7 L/d In dual purpose medium extensions: 7.9 L/d In dual purpose small extensions: 5.6 L/d In dual purpose subsistence - high density: 5.6 L/d In dual purpose subsistence - low density: 6.0 L/d In beef cattle farming: not applicable (IICA, 2024)
The following production systems are identified: 1. Specialized dairy system. 2. Dual-purpose system. Subdivided into a) Large extensions. b) Medium extensions. c) Small extensions. d) Subsistence dual-purpose (Subdivided into: i. High animal density. ii. Medium animal density) 3. Meat production system.
The 166 kg represents the average initial live weight of 6.5-month-old Holstein heifers under tropical conditions in El Salvador (Corea et al., 2020).
The 124 g LWG/kg DM represents the average feed conversion with 360 g/kg CP of RUP, being 10 g LWG/kg DM higher than with 260 g/kg CP of RUP (Corea et al., 2020).
The 151 g/kg DM represents the crude protein content in cowpea hay, being 95.5 g/kg DM higher than pangola grass hay (55.5 g/kg DM) (Corea et al., 2020).
The 900 g/day represents the average live weight gain in heifers fed cowpea hay, being 90 g/day higher than those with pangola grass hay (Corea et al., 2020).
