Studies on the Quality and Palatability of Imported Hay and Straw
2009
Han, S.C., Chungnam National University, Daejeon, Republic of Korea | Lee, I.D., Chungnam National University, Daejeon, Republic of Korea | Lee, H.S., Woosong Information College, Daejeon, Republic of Korea
The experiment was carried out from January through December in 2008 at Chungnam National University and the Unbong Animal Genetic Resources Station, NIAS. The experimental animals were twelve dairy goats (♀, 30 ± 1.8 kg), twelve Korean native goats (♀, 24 ± 2.4 kg) and five sika deer (♀, 92 ± 5.2 kg). A total of 11 different types of hay and straw were tested in this study: such straw imported from USA in 2006 as annual ryegrass, perennial ryegrass, tall fescue and Kentucky bluegrass, and such hay imported from USA in 2007 as alfalfa, bermudagrass, timothy, kleingrass, oat and orchardgrass, and such domestic hay as mixed hay. There were significant differences in chemical composition and in vitro dry matter digestibility (IVDMD) among the various types of imported hay and straw (p less than 0.05). Besides alfalfa hay and orchardgrass hay all of the imported hay contained lower crude protein (CP) and IVDMD but contained higher neutral detergent fiber (NDF) and acid detergent fiber (ADF) than the domestic hay. According to the kinds of the imported hay, relative feed value (RFV) made the difference and the hay grades were ranged from 4 to 5, based on the RFV. According to the kinds of the imported hay, there were markedly differences in dry matter (DM) intake and palatability ranking among dairy goats, Korean native goats, and sika deer. DM intake and palatability ranking were high in common between orchardgrass hay and bermudagrass hay, but Kentucky bluegrass straw, tall fescue straw, perennial ryegrass straw and annual ryegrass straw were proved to be very low in DM intake and palatability ranking. In conclusion, the quality and palatability among the imported hay that was tested in the study were quite variable and lower than expected. It is required to establish a better feed evaluation system for the imported hay.
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