Grazed barley for dairy cows in small-scale systems in the highlands of Mexico

• Published in: Italian journal of animal science 2022-12, Vol.21 (1), p.178-187
• Main Authors: Gómez-Miranda, Aída, López-González, Felipe, Vieyra-Alberto, Rodolfo, Arriaga-Jordán, Carlos M.
• Format: Article
• Language: English
• Subjects: Barley; Cereals; Defoliation; Dry matter; Feeding; feeding costs; Feeding strategies; Grazing; Mexico; Milk; Milk production; Milking; Rainfall; Seeding; small grain cereals
• ISSN: 1828-051X; 1594-4077; 1828-051X
• DOI: 10.1080/1828051X.2021.2022540

Small-grain cereals with characteristics of hardiness of, such as barley have been evaluated as conserved forage for cows in small-scale dairy systems (SSDSs); but barley may also be grazed due to its regrowth capability after defoliation. The objective was to assess grazing of barley at 59 (B59), 66 (B66) and 73 (B73) days after seeding with milking cows in SSDSs. Twelve Holstein cows were grouped in a randomised 3 × 3 Latin Square design, replicated four times, with 14-day experimental periods. Measurements of animal variables and collection of feed and milk samples took place over the 4 final days of each period. A partial cost analysis was performed including only feeding expenses. The mean net forage accumulation during the experiment was 97.1 kg DM d −1 . The botanical composition was affected by secondary vegetation (Mexican aster and wild radish, among others), where barley content was higher in B73 than in B66 and B59 pastures. The contents of dry matter (189-414 g·kg), neutral detergent fibre (NDF; 456-585 g·kg/DM), acid detergent fibre (ADF; 181-265 g·kg/DM) and crude protein (CP; 86-158 g·kg/DM) showed significant (p