본 연구의 첫 실험에서는 발근제 처리가 ‘Bluecrop’, ‘Duke’, ‘Sunrise’ 하이부시 블루베리 품종의 숙지삽 발근과 추후 생장에 미치는 영향을 조사하였다. 삽수의 기부 1-cm에 IBA와 NAA 0, 500, 1000mg · L−1 용액에 5초간 침지하였고 또한 루톤 분제도 처리하였다. 삽목 90일 후 ‘Bluecrop’과 ‘Sunrise’품종의 발근율과 근중은 NAA 500mg · L−1 처리에 의해서 증가한 반면 ‘Duke’ 품종에서는 IBA 500mg · L−1가 뿌리 생장에 효과적이었다. 이러한 발근제 처리에 의한 삽수 부정근의 초기 발달에서 증가는 개별포트에서 추후 생육의 증가로 이어졌다. 두 번째 실험에서는 삽상의 차광처리(30~90%)가 위 블루베리 품종들의 숙지삽의 발근과 생장에 미치는 영향을 조사하였다. 30% 차광은 무차광 대조구와 비교했을 때 모든 품종에서 발근율, 뿌리와 줄기의 생장을 증가시켰다. 그러나 특별히 분무시설이 없는 삽상에서 차광을 50% 이상으로 했을 때 하이부시 블루베리의 숙지삽의 발근과 생장은 상당히 억제되었다.

Rooting agents and shading treatments were tested in two different experiments to determine their effects on the establishment success of hardwood cuttings of three highbush blueberry varieties ‘Bluecrop’, ‘Duke’ and ‘Sunrise’. For the experiment with rooting agents, one-cm long bases of the cuttings were dipped into solutions of IBA or NAA for 5 s, both at 0, 500 and 1000 mg · L−1 in 50% ethanol, and were also treated with Rootone® powder. Determined 90 days after cutting, the percent rooting and root weight were increased by NAA at 500 mg · L−1 in ‘Bluecrop’ and ‘Sunrise’, while in ‘Duke’ IBA at 500 mg · L−1 was effective. These auxin treatments were found to work better than a commercial product Rootone®. The rooting agent-induced increases in root development resulted in better shoot growth of the cuttings in all three varieties, as determined after 90 days of further growth in individual containers. In the experiment with shading treatments, different levels of the shading treatment (30 to 90%) were imposed over the cutting bed under no mist. In all three varieties, 30% shading increased the percent rooting and root and shoot growth, compared to no shading control. However, shading levels higher than 50% shading were found to be inhibitory for hardwood cuttings of highbush blueberries, especially under the environmental conditions with no mist system.

Abstract.
 Introduction
 Methods and Materials
  1. Plant materials and hardwood cuttings
  2. Expt. 1: Response of highbush blueberry cuttingsto rooting agent treatments
  3. Expt. 2: Effects of shading treatments on hardwoodcuttings of highbush blueberries
  4. Experimental design and data analysis
 Results and Discussion
  1. Expt. 1: Response of highbush blueberry cuttingsto rooting agent treatments
  2. Expt. 2: Effects of shading treatments on hardwoodcuttings of highbush blueberries
 Acknowledgement
 Literature Cited
 적 요.

• Eunju Kim(Deparment of Horticulture, Jeollabuk-do ARES, 전라북도 농업기술원 과수과) | 김은주
• Sunghee Guak(전북대학교 농업생명과학대학 원예학과, Department of Horticulture, Chonbuk National University) | 곽성희 Corresponding author