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KMID : 1025520040460020227
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Journal of Animal Science and Technology
2004 Volume.46 No. 2 p.227 ~ p.234
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Effect of Variety and Harvest Date on the Forage Production and Quality in Winter Rye
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이병생/Lee, B. S.
김종덕/권찬호/정길웅/Kim, J. D./Kwon, C. H./Chung, K. W.
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Abstract
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This experiment was conducted at Cheonan Yonam Experimental Livestock Farm in 2001~2002 to determine the effect of harvest date(20 April, 26 April and 4 May) on forage yield and quality of rye varieties of three different maturing groups(early maturing variety = "Koolgrazer", midseason maturing variety = "Homil22" and late maturing variety = "Danko"). The heading date of Koolgrazer, Homil22 and Danko were 17, 22 and 19 April, respectively. Dry matter percentage increased from 15.6 to 21.6% as the harvest date was delayed from April 20 to May 4. Among the rye varieties tested, dry matter percentage of Koolgrazer, Homil22 and Danko were 20.9, 18.8 and 16.3%, respectively. Dry matter yield increased from 11.2 to 13.9 ton/ha as the harvest date was delayed, but no significant difference among rye varieties. As the harvest date was delayed, total digestible nutrients(TDN) yield also increased significantly from 704 to 8.4 ton/ha. However no significant difference was found among rye varieties. Crude protein(CP) percentage decreased from 20.3 to 17.1% as the harvest date was delayed, and CP percentage of late maturing variety, Danko, was significantly higher than that of the other varieties. In content of fiber component(NDF, ADF, ADL, hemicellulose and cellulose) of rye, the late harvest date(4 May) showed the highest among harvest dates. From comparison within rye varieties tested, Koolgrazer, a early maturing variety had higher than a midseason and late maturing varieties, Homill22 and Danko. The cellulase digestible of organic matter of dry matter(CDOMD) decreased as the harvest date was delayed. Among the rye varieties tested, the CDOMD of a early maturing variety, Koolgrazer was the lowest. Our study differences of winter rye in forage yield and quality resulting from variety maturity and harvest stage. A early maturing variety, Koolgrazer should be harvested between 24 and 28 April, Homill 22(midseason maturing variety) harvested between 29 April and 3 May, Danko(late maturing variety) harvested between 4 and 8 May for maximum forage yield and optimum quality.
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