Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Influence of Various Root Media in Pot Growth of 'Seolhyang' Strawberry on the Growth of Daughter Plants and Early Yield after Transplant

'설향' 딸기 포트육묘를 위한 혼합상토 종류가 자묘의 생육과 정식 후 초기수량에 미치는 영향

  • Park, Gab Soon (Buyeo-gon Agriculture Technology Center) ;
  • Kim, Yeoung Chil (Department of Horticultural Science Kongju National University) ;
  • Ann, Seoung Won (Department of Horticultural Science Kongju National University) ;
  • Kang, Hee Kyoung (Department of Horticultural Science Kongju National University) ;
  • Choi, Jong Myung (Department of Horticulture, College of Agriculture and Life Sciences, Chungnam National University)
  • Received : 2014.07.19
  • Accepted : 2014.10.10
  • Published : 2015.04.30
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Abstract

The objective of this research was to investigate the influence of various root media on the growth of mother and daughter plants during propagation and early yield after transplanting of 'Seolhyang' strawberry. To achieve this, daughter plants were fixed to connected small pots that contained expanded rice-hull (ERH), a strawberry-specialized commercial medium (SSCM), soil mother materials (SMM), or loamy sand (LS). Then, growth of daughter plants in above- and below-ground tissue as well as early yield after transplanting to plastic house soil were investigated. The growth of daughter plants in terms of plant height, leaf area and fresh weight were the highest in the SSCM treatment. Root growth in terms of the amount of primary roots and root dry weight were the highest in the treatments of ERH and SMM and the lowest in that of SSCM, among treatments tested. The ERH treatment also showed the highest values among treatments in root length, surface area and volume when roots with 0 to 0.4 mm in diameter were investigated. The flower bud differentiation of daughter plants began on Sept. 3 in the ERH treatments, earlier than the SMM (Sept. 5) and in SSCM (Sept. 7) treatments. The tissue N contents of daughter plants were in the range of 1.41 to 1.55% in all treatments, and no significant differences were observed among treatments. This indicates that the low moisture retention capacity of ERH and water stress, rather than tissue N contents, promote the flower differentiation of daughter plants. In the evaluation of early yield after transplant, the ERH treatment of showed the highest yield in the period from November to December, reaching 667 g fruit weight per 10 plants. The yields per 10 plants in the other treatments were 581 g in SMM, 475 g in SSCM and 295 g in LS. Above results imply that the various root media have different effects on the growth of daughter plants as well as flower bud differentiation. Therefore, improvement in early yield after transplant can be achieved through selection of proper root medium for daughter plant propagation.

'설향' 딸기 포트 육묘에서 상토의 종류가 자묘 생육 및 정식 후 초기수량에 미치는 영향을 구명하기 위해 본 연구를 수행하였다. 자묘 재배용 상토는 팽연왕겨, 딸기전용상토, 마사토 및 양질사토의 4종류였다. 정식 전 조사한 자묘의 생장은 딸기전용상토로 육묘한 처리가 초장, 엽 면적 및 생체중 등 지상부 생장이 가장 우수하였고, 마사토 처리는 초장, 그리고 양질사토 처리는 엽 면적 및 관부 굵기가 가장 적거나 가늘었다. 팽연왕겨와 마사토 처리가 1차 근수가 많고 뿌리 건중량도 가장 무거웠으며, 딸기전용상토 처리는 모든 처리중 뿌리 건중량이 가장 가벼웠다. 뿌리직경 0-0.4mm 범위의 근장, 근 표면적, 근부피를 측정한 결과 팽연왕겨에서 뚜렷하게 우수하였다. 화아분화는 팽연왕겨 처리가 9월 3일, 마사토 9월 5일, 그리고 양질사토와 딸기전용상토 처리는 9월 7일에 시작되었다. 8월 30일 수확한 자묘의 지상부 건물중에 기초한 총 질소 함량은 1.41-1.55% 범위로 처리별 통계적인 차이가 인정되지 않았으며, 팽연왕겨 처리의 화아분화가 빨랐던 것은 왕겨의 낮은 보수력으로 인한 수분부족 스트레스가 중요한 영향을 미쳤다고 판단하였다. 본포정식후 11-12월의 초기수량에서 팽연왕겨 처리가 667g/10주, 마사토 581g, 그리고 양질사토와 딸기전용상토 처리는 각각 475g과 295g였고, 모든 처리에서 25g이상 상품과 비율은 73-100% 이었다. 이상의 연구결과는 육묘를 위한 상토의 종류가 자묘의 생육에 영향을 미침을 나타내고 있으며, 자묘의 근권부 생장과 화아분화 촉진 그리고 조기수량증대를 위해 본 연구 결과가 활용될 수 있을 것이다.

Keywords

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