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

The Korean Society of Grassland and Forage Science (한국초지조사료학회)
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Comparative study of Seed Productivity of Spring Sown Italian Ryegrass(Lolium multiflorum Lam.) Depending on Seeding Distance in Gangwon Highland

강원 고지대에서 봄 파종 이탈리안 라이그라스(Lolium multiflorum Lam.)의 파종 간격에 따른 종자 생산성 비교 연구

  • Jeong, Eun Chan (Graduate School of International Agricultural Technology, SNU) ;
  • Li, Yan Fen (Graduate School of International Agricultural Technology, SNU) ;
  • Kim, Hak Jin (Research Institute of Eco-friendly Livestock Science, GBST, SNU) ;
  • Kim, Meing Joong (Research Institute of Eco-friendly Livestock Science, GBST, SNU) ;
  • Ji, Hee Chung (Department of Grassland and Forage Science, NIAS, RDA) ;
  • Kim, Jong Geun (Graduate School of International Agricultural Technology, SNU)
  • 정은찬 (서울대학교 국제농업기술대학원) ;
  • ;
  • 김학진 (서울대학교 그린바이오과학기술연구원) ;
  • 김맹중 (서울대학교 그린바이오과학기술연구원) ;
  • 지희정 (국립축산과학원 초지사료과) ;
  • 김종근 (서울대학교 국제농업기술대학원)
  • Received : 2021.02.02
  • Accepted : 2021.03.16
  • Published : 2021.03.31
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Abstract

This experiment was conducted to study on the growth characteristics and seed productivity of Italian ryegrass (Lolium multiflorum Lam., IRG) planted in the Spring in Gangwon Highland according to the seeding distance (20, 30 and 40 cm). The field was located in highland around 600 m above sea level. The experimental design was randomized block design with three replication and the tested IRG variety was 'Greencall' developed by National Institute of Animal Science (NIAS). IRG was sown on March 26, 2020, and harvested on July 2. The plant height was the shortest at 80.5 cm in the 40 cm seeding distance plot (P<0.05), and there was no significant difference between the 20 and 30 cm seeding distance. The number of spike per square meter (㎡) was significantly higher in the 20 cm seeding distance plot than that of 40 cm (937 vs. 571). The dry matter (DM) content of seed and straw after harvesting was 49.70 and 33.36 % on average, and there was no significant difference between treatments (P>005). However, there was a significant difference in the fresh and DM yield of seeds and straw (P<0.05). DM yield of seeds was significantly higher in 20 cm distance than that of 40 cm, and the yield of straw was the same trend. On the other hand, there was no significant difference in DM yield between 20 cm and 30 cm and also in the feed value of straw after seed harvesting among seeding distance. The average CP, ADF, NDF, and TDN contents were 6.91, 36.76, 61.75 and 59.86%, respectively, and the RFV value was 91. Considering the above results, the production of Italian ryegrass seeds sown in the spring in the highlands of the Gangwon is lower than that of autumn sowing, but it is judged that it needs to be reviewed in case it is unavoidable. In the future, there should be an economic analysis and the development of technology that can increase production.

본 시험은 강원지역에서 봄철 파종한 이탈리안 라이그라스(Lolium multiflorum Lam.)의 파종 간격(20, 30 및 40 cm)에 따른 생육특성과 종자 생산성을 비교하기 위해 수행되었다. 시험포장은 해발 600 m 내외의 고지대로 최근 육성된 극조생종 그린콜(Greencall) 품종을 공시하여 난괴법 3반복으로 수행하였다. 시험구의 파종은 2020년 3월 26일에 하였으며 수확은 출수일로부터 60일째인 7월 2일에 하였다. 출수기 5월 8일 이었으며 도복 및 질병 저항성은 처리 간에 차이는 없었다(P>0.05). 초장은 40 cm 파종 간격 시험구에서 80.5 cm로 가장 짧았으며 20 및 30 cm 파종간격간에는 차이가 없었다. 종자의 특성중 이삭의 길이, 이삭당 종자수, 아삭당 종자무게 및 천립중에 있어서는 유의적인 차이가 없었으나 단위면적당(㎡) 이삭두는 20 cm 파종간격이 40 cm에 비해 유의적으로 많았다(937 vs 571). 종자 및 채종 후 짚의 생산량은 건물함량의 경우 평균 49.70 및 33.36으로 처리간에 유의적인 차이는 없었다. 그러나 종자와 짚의 생초 및 건물 수량은 유의적인 차이를 보였는데 20 cm 파종간격이 40 cm 보다 종자의 건물수량이 유의적으로 높았고 짚의 수량도 같은 경향이었다. 한편 20 cm와 30 cm 간에는 유의적인 차이를 나타내지 않았다. 채종 후 짚의 사료가치는 파종간격간에 유의적인 차이는 나타나지 않았고 평균 조단백질, ADF, NDF, TDN 함량은 각각 6.91, 36.76, 61.75 및 59.86%로 나타났으며 RFV 값은 평균 91이었다. 이상의 결과를 종합하여 볼 때 강원지역 고지대에서 봄에 파종한 이탈리안 라이그라스의 종자 생산량은 가을 파종보다는 낮지만, 부득이한 경우를 대비하여 검토할 필요가 있다고 판단되며, 추후 생산을 높일 수 있는 기술의 개발과 경제성 분석이 있어야 할 것이다.

Keywords

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