학술논문
Intake in cattle of a ground switchgrass and alfalfa hay mixture blended with various levels of sucrose or citric acid.
Document Type
Article
Source
Subject
*FOOD consumption
*CATTLE feeding & feeds
*SWITCHGRASS
*ALFALFA as feed
*MIXING
*SUCROSE
*CITRIC acid
*
*
*
*
*
*
Language
ISSN
0377-8401
Abstract
Abstract: Palatability of feed affects voluntary intake. The objectives were to evaluate preference by bovine for sweet (sucrose) or sour (citric acid) blended with a mixture of ground switchgrass (42g crude protein/kg dry matter) and alfalfa hay (176g crude protein/kg dry matter). Flavors were dissolved in 50mL deionized water per kg of hay for blending. In Experiment 1, sucrose hay (S100) had 100g sucrose added per kg hay. Citric acid hay (CA50) had 50g citric acid added per kg hay. Control hay (CON) had 50mL deionized water added per kg hay. In Experiment 2, treatments were CON, sucrose added at 25g per kg hay (S25), S100, 150g per kg hay (S150). Citric acid added at 25g per kg hay (CA25), and CA50. Hays were mixed in a horizontal mixer 3d prior to each experimental period. Twelve beef cattle (initial BW=283±25kg) were housed under a roof on expanded metal flooring with access to six feed locations designated I through VI, west to east. Cattle consumed 1kg/day of supplement (corn, soybean hulls, and trace mineralized salt) that was fed daily, after hay orts were removed and weighed at 0800. Cattle were offered treatment hay equal to 6g per kg BW at each feed slot and treatments were randomly assigned to two of the six locations at 0830. Cattle were given a 14-d adaptation to CON followed by a 7-d offer of treatments. In Experiment 1, cattle preferred S100 (3.42±0.04kg/d) over CON (2.8±0.04kg/d, P<0.01) and CA50 (0.32±0.04kg/d, P<0.01) and preferred CON over CA50 (P<0.01). In Experiment 2, cattle preferred CA10 over CON (P<0.02) and CA25 (P<0.02), and S100 was preferred over S150 (P<0.02) and S25 (P<0.02). Compared with control, cattle preferred hay flavored with sucrose up to 100g per kg of hay, and preferred hay flavored with citric acid up to 10g per kg of hay. Flavored feeds that are nutritionally adequate can be used to provide variety in the diet of cattle, where total intake increases when different feeds are presented together. Adding sugar may increase intake of undesirable feeds, or citric acid may be added at greater than 10g per kg hay to limit intake of desirable feeds. [Copyright &y& Elsevier]