NR 17. Feed supplementation with diets based on local resources in postcalving dual purpose cows on Guarico state highlands. Venezuela. I. Effect on the milk production

Three rations were compared as to their effects on 125 postcalving dual purpose mature cows, weighting 371 +/- 37 kg , grazing native pasture and crop residues, on highland farms at Guárico State. Milk production, body condition (BC) and live weight (LW) was evaluated using a randomized design: T1 = (control), grazing crop residues + Sugar cane bagasse-molasses and mineral mixture; T2 = T1 + tomatoe waste (25 %) + urea mixes of sorghum residues and Pithecelobium saman hulls, urea and minerals mixture; T3 = T1 + tomato waste ad libitum. BC and body weight were estimated at the beginning of the trial and monthly. The milk production was measured weekly. A General Lineal Model was used to analyze: average milk production /month/cow/treatment, and milk production/cow-teat/treatment. The supplements represented 4.9; 13.69 and 19.94 (MJ/d) of Metabolized Energy (EM) for T1, T2 and T3 respectively. The average milk production/cow/week were: 10.92; 11.4; 13.75 kg and the average milk production /teat/cow/week were: 3.51a; 3.26a; 5.57b kg for T1, T2 and T3 respectively. It is concluded that the tomatoes as a local resource could be a strategic in the improvement of the milk production per cow-teat (P<.05).

Bibliographic Details

Main Authors:	Gonzalez, Adrian, Dominguez, Carlos, Ureña, Jose A., Zahalka, Karel
Format:	Digital revista
Language:	spa
Published:	Asociacion Latinoamericana de Produccion Animal 2005
Online Access:	https://ojs.alpa.uy/index.php/ojs_files/article/view/99
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