KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Rice Plant Growth Characteristics According to Different Seed Germination Length and Damage

볍씨 최아 및 최아 손상정도에 따른 초기생육변화 분석

  • 최명구 (농촌진흥청 국립식량과학원) ;
  • 정재혁 (농촌진흥청 국립식량과학원) ;
  • 이현석 (농촌진흥청 국립식량과학원) ;
  • 양서영 (농촌진흥청 국립식량과학원) ;
  • 이충근 (농촌진흥청 국립식량과학원) ;
  • 황운하 (농촌진흥청 국립식량과학원)
  • Received : 2021.06.28
  • Accepted : 2021.08.17
  • Published : 2021.09.01
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Abstract

We checked the emergence rate and early growth characteristics of young rice plants according to the germination length and seed damage ratio in direct seeding. The emergence rate was reduced according to the longer germination length and higher seed damage ratio. The emergence rate was further reduced under high-temperature conditions. The leaf number did not show a significant difference according to germination length and seed damage ratio. However, shoot and root dry weights were reduced according to the germination length and seed damage ratio. The root dry weight was highly correlated with the shoot dry weight. Based on these results, we concluded that a longer germination length and seed damage could induce the loss of nutrients and affect poor root growth, consequently inducing poor emergence and growth in the early growth stage of rice seeds. Therefore, in rice direct seeding, seed conditions of less than 1 mm of germination length should be checked for a sufficiently high standing rate and adequate growth characteristics after seeding.

볍씨 종자의 최아정도 및 최아 손상정도에 따른 출현율 및 초기생육변화를 분석한 결과는 다음과 같다. 1. 볍씨 최아 길이가 길수록 출현율은 다소 감소하였으며 생육온도가 18℃ 이상으로 높을수록 차이가 큰 것으로 나타났다. 2. 최아 길이가 길수록 초장신장 속도가 감소하였으며 생육온도가 21℃ 이상으로 높을 시 최아길이 3 mm에서 초장이 크게 감소하였다. 3. 최아길이에 따른 엽수변화는 없었으나 줄기 두께 및 줄기 건물중, 뿌리 건물중은 최아길이가 길수록 유의하게 감소하였다. 4. 최아 손상정도가 증가할수록 출현율은 유의하게 감소하였으며 생육온도가 높을수록 감소폭은 증가하으며 엽수변화는 없었으나 줄기 두께 및 줄기 건물중, 뿌리 건물중은 최아 손상도가 길수록 유의하게 감소하였다. 최아 길이 및 종자 손상정도별 뿌리 건물중과 줄기 건물 중 변화는 유의한 정의 상관관계를 보였다.

Keywords

Acknowledgement

본 연구는 농촌진흥청 신농업기후변화대응체계구축사업(사업번호: PJ01488603)의 지원에 의해 이루어진 결과로 이에 감사드립니다.

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