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Alkali-Treated and Raw Sugarcane Bagasse as Roughages in Complete Rations for Lactating Cows

Animal Husbandry Department, University of Puerto Rico, Lajas, 00667

R. Carrero and I. Valencia

and Industrial Research Department, Economic Development Administration of Puerto Rico, San Juan 00936

ABSTRACT

Forty percent alkali-treated (2% NaOH for 24 hr) and raw sugarcane bagasse, combined with 27% cane molasses, 18.45% shelled corn, 10% tunafish meal, 2.5% urea, and 2.05% other ingredients were evaluated in complete rations, group fed ad libitum, along with a control of grazing plus supplemental nonbulky concentrates at .36 kg per kilogram of milk. Sixteen cows completed the 300-day experiment in each of the complete rations and 14 in the control.

Daily consumptions of treated and raw-bagasse complete rations and of control concentrates averaged 16.5, 14.2, and 6.0 kg. Daily milk productions were 17.2, 12.5, and 16.5 kg, with raw-bagasse inferior at P<.01. Milk fat and total solids percentages were 3.13 and 11.78; 3.38 and 12.01; and 3.68 and 12.39, with the control superior to treated-bagasse at P<01. Daily liveweight gain, .04 kg,, by raw-bagasse cows was less (P<.01) than that of treated-bagasse cows, .22 kg, and (P<.05) of the controls, .17 kg.

¹ Present address: Integrated Industries, Inc., Box 777, Mayaguez, Puerto Rico 00708.