Abstract

본 시험은 숙기가 다른 호밀 4품종(조생종=‘Koolgrazer’, 중생종=‘Homil22’ 및 만생종=‘Danko’)을 공시하여 수확시기를 4월 20일, 4월 26일 및 5월 4일로 달리하였을 때 호밀의 사초수량과 품질을 비교하기 위하여 천안연암대학실습농장에서 2001년에서 2002년까지 수행하였으며 얻어진 결과는 다음과 같다. Koolgrazer, Homil22 및 Danko의 출수기는 각각 4월 17일, 22일 및 29일 이었다. 건물률은 수확시기가 4월 10일에서 5월 4일로 늦어짐에 따라 15.6%에서 21.6%로 증가하였다. 한편 품종간 비교에서는 Koolgrazer, Homil22 및 Danko가 각각 20.9, 1838 및 16.3%로 Koolgrazer가 가장 높았다. 호밀의 건물수량은 수확시기가 늦어짐에 따라 ha당 11.2톤에서 13.9톤으로 증가하였으나, 호밀품종간에는 유의적인 차이가 없었다. 가소화영양소 총량(TDN) 수량은 수확시기가 늦어짐에 따라 ha당 7.4톤에서 8.4톤으로 증가하였으며 한편 품종간에는 유의적인 차이가 없었다. 조단백질 함량은 수확기기가 늦어짐에 따라 20.3%에서 17.1%로 감소하였으며, 품종 중에서는 만생종인 Danko가 Koolgrazer 및 Homil22보다 높았다. 섬유소 함량(NDF, ADF, ADL, Hemicellulose 및 Cellulose)에서는 만기수확인 5월 4일이 수확시기 중 가장 많았다. 한편 호밀의 품종간 비교에서는 조생종인 Koolgrazer가 중생종과 만생종인 호밀22 및 Danko보다 섬유소 함량이 많았다. Cellulase에 의한 유기물 소화율은 수확시기가 늦어짐에 따라 감소하였다. 품종간 비교에서는 조생종인 Koolgrazer가 가장 낮았다. 호밀의 품종과 수확기기간에는 사초생산성 뿐만아니라 품질에서도 유의적인 차이가 있었다. 사초생산성이 최대이고 적정 품질을 위한 조생종인 Koolgrazer 시기는 4월 24일에서 4월 28일, 종생종인 Homil22는 4월 29일에서 5월 3일, 만생종인 Danko는 5월 4일에서 5월 8일이라고 생각된다. This experiment was conducted at Cheonan Yonam Experimental Livestock Farm in 2001-2002 to detennine 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 = ‘Horni122’ and late maturing variety = ‘Danko’). The heading date of Kooigrazer, Hornil22 and Danko were 17, 22 and 29 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, Hornil22 and Danko were 20.9, 18.8 and 16.3%, respectively. Dry matter yield increased from 1l.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 7.4 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 comparisoo within rye varieties tested, Kooigrazer, a early maturing variety had higher than a rnidseason and late maturing varieties, Hornill22 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, Kooigrazer should be harvested between 24 and 28 April, Hamill 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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