KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Evaluations of Growth and Forage Quality of Sesbania Accessions Adaptable to Korean Environments

국내적응 세스바니아의 생육특성 및 사료가치 평가

  • Lee, Chang Min (National Institute of Crop Science, RDA) ;
  • Kim, Young Jin (National Institute of Crop Science, RDA) ;
  • Ahn, Sol (Department of Crop Science & Biotechnology, Chonbuk National University) ;
  • Hailegioris, Daniel (Department of Plant Science, Wollo University) ;
  • Lee, Cheong Ae (Institute of Agricultural Science and Technology) ;
  • Yun, Song-Joong (Department of Crop Science & Biotechnology, Chonbuk National University)
  • 이창민 (농촌진흥청 국립식량과학원) ;
  • 김영진 (농촌진흥청 국립식량과학원) ;
  • 안솔 (전북대학교 작물생명과학과 대학원) ;
  • ;
  • 이정애 (전북대학교 농업과학기술연구소) ;
  • 윤성중 (전북대학교 작물생명과학과)
  • Received : 2019.07.12
  • Accepted : 2019.09.16
  • Published : 2019.09.30
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Abstract

Sesbania, an annual herb, is known for its high forage value and salt tolerance. It has merits as a forage crop that is adaptable to reclaimed land in the Republic of Korea. Therefore, we collected Sesbania genetic resources from the Republic of Korea and other countries, and conducted experiments to evaluate their potential as a forage crop in Korean climate and soil conditions. In the preliminary experiments, 15 genetic resources which were able to set seeds in Korean environment were selected out of a total of 46 collected genetic resources. Among 15 genetic resources, SL13 was the tallest and it was followed by that of SC04, SR01 and SE07. The accessions with the earliest flowering started flowering 101 days after sowing and set seed in early August. Fifteen accessions were evaluated for their salt tolerance at germination stage based on germination rate and growth of germinated seedlings at 0 mM, 150 mM and 300 mM NaCl concentrations. Five genetic resources like SC04, SL13, SS20, SS24 and SR01 were selected to be tolerant to NaCl treatment. Forage value was evaluated based on crude protein, acid detergent fiber, neutral detergent fiber and in vitro dry matter digestibility. The forage value of leaves was significantly higher than that of stems, and the forage value of the stem was slightly better than that of rice straw. The forage value of leaves of all the genetic resources was higher than grade 1 by the American Forage and Grassland Council grade. Among five selected genetic resources, the relative feed value of SC04 was the highest and it was followed by that of SS20, SL13, SS24 and SR01.

1년생 콩아과 작물인 세스바니아는 사료가치가 우수하고 높은 수준의 내염성을 가진다고 알려져 있다. 본 실험은 국내 간척지에서의 조사료 생산에 적합한 사료작물을 발굴하기 위하여 국내 기후조건에서 개화와 결실이 가능한 도입 유전자원 15점의 주요 생육 특성과 발아기 내염성 및 사료가치 등을 평가하였다. 일반 시험포장에서의 세스바니아 유전자원의 개화는 파종 82일 후에 시작 되었으며, 7월 중하순에 유전자원 대부분이 개화하였고, 결실은 8월 초부터 시작되었다. 초장은 평균 2.93 m (최소 1.98 m, 최대 4.23 m)이었으며, SL13이 4.23 m로 가장 길었고, 그 다음으로 SC04, SR01 등이 길었다. 건물생산량은 평균 113.8 ton/ha (최소 27 ton/ha, 최대 278 ton/ha)이었으며 유전자원의 경직경에 의해 건물생산량이 크게 영향을 받았는데, 세스바니아의 줄기는 시간이 지남에따라 경화되었기 때문에 엽수가 많은 자원이 사료로 이용가치가 높을 것으로 보이며, 엽수가 많았던 SR01과 SL13이 138 ton/ha, 133 ton/ha으로 비교적 높은 건물생산량을 보였다. 종자를 NaCl 0 mM, 150 mM, 300 mM 용액에서 7일간 처리한 뒤 발아율 및 유묘의 지상부와 뿌리의 길이로 평가된 발아기 내염성은 SC04, SL13, SS20, SS24, SR01 등이 높았다. 개화기에 채취한 시료의 CP, ADF, NDF, IVDMD를 기준으로 평가된 사료가치는 잎이 줄기보다 월등히 높았으며, 줄기의 사료가치는 볏짚보다 약간 양호한 수준이었다. 모든 유전자원의 잎은 AFGC가 규정한 조사료 품질등급에서 1등급 이상이었는데, 출수기와 생육특성을 고려하였을 때 RFV가 우수한 것으로 평가된 SC04, SL13, SS20, SS24, SR01은 발아기 내염성도 강하였기 때문에 이들 자원에 대해 간척지 토양에서의 조사료 생산 가능성에 대한 추가실험을 수행할 가치가 있다고 생각된다.

Keywords

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