Journal of The Korean Society of Grassland and Forage Science (한국초지조사료학회지)

The Korean Society of Grassland and Forage Science (한국초지조사료학회)
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Comparison of Growth Characteristics, Productivity and Feed Values between Varieties of Sudangrass and Sorghum-Sudangrass Hybrids

수단그라스 교잡종과 수수-수단그라스 교잡종 간의 생육특성, 수량성 및 사료가치 비교

  • 최기준 (농촌진흥청 국립축산과학원) ;
  • 이상훈 (농촌진흥청 국립축산과학원) ;
  • 이기원 (농촌진흥청 국립축산과학원) ;
  • 지희정 (농촌진흥청 국립축산과학원) ;
  • 황태영 (농촌진흥청 국립축산과학원) ;
  • 김기용 (농촌진흥청 국립축산과학원)
  • Received : 2017.02.14
  • Accepted : 2017.03.21
  • Published : 2017.03.30
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Abstract

This experiment was carried out to compare the growth characteristics and productivity between sudangrass and sorghum-sudangrass hybrid under the same cultivation condition in Cheonan and Kimje of Korea from 2010 to 2011. Sudangrass hybrids(Choice, Sunstar and Piper) and sorghum-sudangrass hybrids(SX-17, Jumbo and Revolution) were planted $5^{th}$ May in Cheonan and $7^{th}$ May in Kimje. Heading date of sudangrass hybrids was $12^{th}$ July which was about 2 week fast more than that of sorghum-sudangrass hybrids. Stem diameter of sudangrass hybrids was about 6mm which was about 5 mm smaller than that of sorghum-sudangrass hybrids. Disease resistance of sudangrass hybrid, "Choice" was similar to that of sorghum-sudangrass hybrids. Dry matter yield of "Choice" was 15ton/ha which was 10% less than that for sorghum-sudangrass hybrids(SX-17). Feed value of "Choice" was similar or slightly lower than that of sorghum-sudangrass. For increasing the productivity in forage cropping systems all around year, sudangrass hybrid is recommended for prolong by the middle ten day of May in the harvesting time of italian ryegrass.

본 연구는 동일한 재배환경에서 수수-수단그라스 교잡종과 수단그라스 교잡종 간의 생육특성과 생산성을 조사하기 위하여 2010년부터 2011년까지 중부지역(천안)과 남부지역(김제)에서 수행되었다. 시험품종은 수수-수단그라스 교잡종인 SX-17(출수형), Jumbo(비출수형) 및 Revolution(BMR) 품종과 수단그라스 교잡종인 Choice, Sunstar 및 Piper 품종으로 하였다. 파종은 5월 5일(천안)과 5월 7일(김제)에 하였다. 수단그라스 교잡종의 출수기는 7월 12일경으로 수수-수단그라스 교잡종보다 약 2주 빨랐고, 줄기 굵기는 6mm 내외로서 수수-수단그라스보다 약 5mm 정도 가늘었다. 수단그라스 교잡종인 Choice 품종의 병해는 수수-수단그라스 교잡종들과 대등한 것으로 평가되었다. Choice 품종의 총 건물수량은 15ton/ha로서 수수-수단그라스 교잡종인 SX-17 보다 10% 정도 적었다. 수단그라스 교잡종인 Choice의 건물소화율은 66.1%, 조단백질 함량은 8.9%, NDF 함량은 65.4%, ADF 함량은 41.3%, TDN 함량은 56.3%로서 수수-수단그라스 교잡종과 대등하거나 약간 낮은 사료가치를 나타내었다. 양질조사료 생산 현장에서 연중조사료 생산 작부체계에서 수단그라스 교잡종은 생육기간이 수수-수단그라스보다 2주 정도 짧으므로 5월 하순에 파종이 가능함에 따라 동계사료작물인 이탈리안 라이그라스가 5월 중하순까지 충분히 생육할 시간을 줄 수 있어 조사료 생산성 향상과 원활한 작부체계의 운영이 기대된다.

Keywords

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