한국작물학회지 (KOREAN JOURNAL OF CROP SCIENCE)

  • 제65권2호
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  • Pages.142-150
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  • 2020
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  • 0252-9777(pISSN)
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  • 2287-8432(eISSN)
한국작물학회 (The Korean Society of Crop Science)
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이탈리안라이그라스 코윈어리 품종의 간척지 채종 재배에서의 적정 수확시기 설정

Identification of Ideal Seed Harvest Time for Itallian Ryegrass (IRG) 'Kowinearly' Variety in Reclaimed Land

  • Kang, Chan Ho (Jeonllabukdo Agricultural Research & Extension Services) ;
  • Lee, In Sol (Jeonllabukdo Agricultural Research & Extension Services) ;
  • Kwon, Suk Ju (Jeonllabukdo Agricultural Research & Extension Services)
  • 투고 : 2020.01.16
  • 심사 : 2020.04.20
  • 발행 : 2020.06.01
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초록

간척지에서 IRG 코윈어리 품종 채종재배 결과 IRG 지상부 생육 최성기는 추파, 춘파 모두 출수 후 20~30일 이었고 춘파의 생육(초장)은 추파의 90.4% 수준이었다. 간척지에서 IRG 종자 수량은 토양의 미성숙 등의 생육환경의 불량으로 일반지에 비하여 전반적으로 하락하였다. 또한 출수 후 기간 경과에 따라 도복과 탈립이 지속적으로 증가하는 경향이 종자 수량에 반영되었는데 노출 후 작물 경작이 이루어지지 않은 처녀지인 새만금 노출지에서 IRG 추파 시 수확 가능한 종자 최고 수량은 238 kg/10a이었고 춘파는 최고 수량이 추파의 71% 수준인 169 kg/10a이었다. IRG는 출수후 18일이 지난 후부터 줄기가 분홍색으로 변하였으며 종자도 출수 후 20일 경과부터 점차적으로 녹색에서 분홍색으로 변하였다. 수확 종자의 발아율은 종자 수분 함량과 밀접한 연관이 있었는데 종자 수분 함량이 55% 이하로 떨어지는 출수 20일~25일부터는 IRG 종자 발아율이 90% 이상을 유지하였다. 따라서 IRG 'Kowinearly' 품종의 채종재배의 수확 적기는 발아율이 90% 이상으로 유지되고 탈립율이 16.8% 이하이면서 최고 수량을 나타내는 출수 20일~30일 사이이었다.

This experiment was conducted to set ideal harvest time for itallian ryegrass (IRG) seed in reclaimed land. For IRG 'Kowinearly' variety sown in both autumn and spring, the peak growth in reclaimed land occurred in 20-30 days after heading. Plant height of IRG seedings in the spring was 90.4% of the fall-sown's plants. The yield of IRG seeds in reclaimed land was generally lower than that of farm land due to poor growth conditions. After heading, the lodging and shattering increased gradually with time. The highest yield of seed in the fall-sown trial treatment was 238 kg/10a. However, in the spring-sown treatment, the highest yield reached 169 kg/10a, which was 71% that of the fall-sown treatment. To set optimum harvesting time for IRG seed, morphological changes in the plant, moisture content of seed, and germination rate were analyzed according to time series after heading. After heading, IRG stem color had turned pink in 18 days and seed color also changed after 20 days. Following 20-25 days after heading, the seed moisture content decreased to below 55% and germination rate increased to over 90%. Therefore optimum harvesting time for IRG 'Kowinearly' variety in reclaimed land was 20-30 days after heading because germination rate and yields were high and shattering percentage was low.

키워드

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피인용 문헌

  1. 강원 산간 지역에서 봄철 파종량에 따른 이탈리안 라이그라스(Lolium multiflorum Lam.)의 종자 생산성 vol.41, pp.1, 2021, https://doi.org/10.5333/kgfs.2021.41.1.23