Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Effects of Different Application Approaches with Diniconazole on the Inhibition of Stem Elongation and the Stimulation of Root Development of Cylindrical Paper Pot Seedling

생장조절체 처리가 원통형 종이포트묘의 도장 억제 및 근권부 발달에 미치는 영향

  • Jang, Dong Cheol (Department of Horticulture, Kangwon National University) ;
  • Xu, Chan (Department of Horticulture, Kangwon National University) ;
  • Kim, Si Hong (Department of Horticulture, Kangwon National University) ;
  • Kim, Dae Hoon (Department of Horticulture, Kangwon National University) ;
  • Kim, Jae Kyung (Department of Horticulture, Kangwon National University) ;
  • Heo, Jae Yun (Department of Plant Science, Gangneung-Wonju National University) ;
  • Vu, Ngoc Thang (Faculty of Agronomy, Vietnam National University of Agriculture) ;
  • Choi, Ki Young (Department of Controlled Agriculture, Kangwon National University) ;
  • Kim, Il Seop (Department of Horticulture, Kangwon National University)
  • 장동철 (강원대학교 원예학과) ;
  • 수찬 (강원대학교 원예학과) ;
  • 김시홍 (강원대학교 원예학과) ;
  • 김대훈 (강원대학교 원예학과) ;
  • 김재경 (강원대학교 원예학과) ;
  • 허재윤 (강릉원주대학교 식물생명과학과) ;
  • 넉탕부 (베트남국립대학교) ;
  • 최기영 (강원대학교 미래농업융합학부) ;
  • 김일섭 (강원대학교 원예학과)
  • Received : 2020.08.11
  • Accepted : 2020.09.02
  • Published : 2020.10.31
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Abstract

This study was conducted to compare the effects of foliar spray and sub-irrigation of the triazole fungicide diniconazole on the regulation of stem elongation and to investigate the stimulation of root system development during the seedling stage. Comparing the two application approaches, there were significant differences in the leaf area, leaf area ratio (LAR), plant height, compactness, fresh shoot and root production, relative growth rate (RGR), and root to shoot ratio (R/S). At the same application concentration, the sub-irrigation showed a better retarding effect on growth than the foliar spray, because the PGR activity of diniconazole in root absorption was higher than that in shoot absorption. For reaching a target of 20% to 30% inhibition rate of stem length, foliar application concentration of diniconazole exceeded 10, however, only approximately 1 was required in the sub-irrigation application. The root system of tomato seedlings responded strongly to diniconazole application. Total root length, root volume, root average diameter, and the number of root tips increased when diniconazole was sub-irrigation application at 1. A reduction in fine roots (diameter range of 0 to 0.3 mm) and an increase in the roots with a diameter range of 0.3 to 0.6 mm was observed, and this may contribute to the increase in average diameter. The increase in root average diameter may be positive because root penetration increases with root diameter. Our results suggested that sub-irrigation maximized the PGR activity of diniconazole to enhance the retarding effect. And it also possible to enhance the tomato seedling root system by diniconazole stimulating with a lower concentration.

본 연구는 원통형 종이포트 토마토 육묘시 Diniconazole의 처리방법이 도장억제 및 근권발달에 미치는 영향을 검토하기 위하여 수행되었다. 그 결과, 엽면적, LAR, 초장, 충실도, 생체중, RGR 및 R/S 에서 시험구간 유의한 차이를 보였다. 동일한 농도를 처리했을 경우, 근권부와 지상부의 흡수도 차이로 인해 저면관수가 엽면살포에 비해 도장억제에 효과적이었다. 저면관수는 엽면시비의 10분의 1의 농도만으로도, 20~30%정도의 동일한 도장억제 효과를 얻을 수 있었다. 디니코나졸 처리에의한 근권부 반응이 흥미로웠는데, 저면관수시 총근장, 근권부피, 평균 근경 및 근단수가 증가하였다. 특히, 0.3mm 이하의 초미세근이 감소하고 0.3~0.6mm의 세근이 증가하였다. 따라서 원통형 종이포트 육묘시 저면관수를 하는 것이 기존 엽면시비에 비해 사용량이 적으면서도 도장억제 및 근권부 활착률을 높힐 수 있을 것으로 판단된다.

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References

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