This study was conducted to determine the optimum medium and humidification period for the strawberry (Fragaria × ananassa Duch. cv. Maehyang) cutting seedling production. The cuttings were planted in coir (CO), rockwool (RW), phenolic foam (PF), and organic foam medium (OFM) with fogging treatment in 0, 3, 6, 9, or 12 days on February, 2019. And, as the field verification examination research, cuttings were planted in CO, RW, PF, and OFM, with misting treatment in 0, 6, 9, 12, or 15 days on June, 2019. In fogging treatments, rooting and survival rates of seedlings tended to increase with longer fogging periods, and rooting and survival rates were showed significantly higher in CO medium with more than 9 days of fogging periods. In misting treatments, rooting rate was significantly higher in CO and RW medium with more than 9 days of misting periods, and survival rate was significantly higher with more than 12 days of misting periods. There was no significantly difference by growth medium and humidification period in shoot and root growth. Therefore, when considering the rooting and survival rate the CO medium with 9 days of humidification period could be beneficial for the production of the ‘Maehyang’ strawberry cutting seedlings.

Ampelopsis brevipedunculata (Maxim.) Trautv., also known as porcelain berry, has been used for many years as herbal folk medicine to treat liver diseases. This study was conducted to assess the influence of various factors on the rooting of hardwood stem cuttings of this plant species, collected from Jeju Island (Korea). Three experiments were conducted: (1) Stems of three diameters (≤ 4.5, > 4.5 – < 6.5, or ≥ 6.5 mm), (2) four types of rooting media [rockwool cubes, perlite, peat moss + perlite (3:1, v/v), or vermiculite] and (3) indole-3-butyric acid (IBA) at four treatment concentrations (0, 100, 200, or 400 mg·L-1). For the IBA concentration experiments, cuttings of the various diameters were inserted to a depth of 2 cm in a commercial propagation medium in 72-cell plug trays. The planted stem cuttings were initially placed on a fog bench for 16 days at 95% ± 5% relative humidity at a temperature of 25°C ± 3°C under 95% shade. The stem cuttings were then transferred to a greenhouse bench under ambient light and fed a nutrient solution on a daily basis for 2 weeks. Among the tested stem diameters, cuttings with a stem diameter ≥ 6.5 mm produced the largest stem diameter (2.6 mm) of new shoot, but without root growth. Initial stem diameter significantly affected the length of the new shoot, and the longest shoot length (67.8 mm) was observed in cuttings with an initial stem diameter of ≥ 6.5 mm. Cuttings inserted in vermiculite produced the largest diameter of new shoot (2.4 mm), whereas cuttings grown in rockwool cubes produced the shortest, stem diameter of new shoot growth (1.9 mm). No significant differences (p ≤ 0.05) were observed in the length of new shoot growth among the various rooting media and IBA concentrations. Furthermore, all tested IBA concentrations failed to induce rooting. Collectively, these results suggest that porcelain berry cuttings with an initial diameter of ≥ 6.5 mm have higher survival and bud break, but they did not produce rooting. Further studies are needed to optimize the protocol for the rooting of hardwood stem cuttings of A. brevipedunculata (Maxim.) Trautv.

규산질 비료가 국화의 발근과 생육에 미치는 영향을 알아보기 위해 절화용 국화 ‘Backwang’과 분화용 국 화 ‘Pink Pixie Time’을 실험작물로 하여 1차 실험은 규소가 국화의 삽목 발근에 미치는 영향을 알아보고자 수행하였고 2차 실험은 규소가 국화의 생육에 미치는 영향을 알아보고자 수행하였다. 1차 실험에서는 ‘Pink Pixie Time’을 실험작물로 하여 토실이 상토 3L에 규 산질비료 0, 30, 60, 90g을 첨가하여 국화의 발근을 조사하였다. 2차 실험에서는 ‘Backwang’을 실험작물로 하여 피트모스와 펄라이트가 혼합된 배지 20L에 규산 질비료 0, 60, 90, 120g, 240g 을 첨가하여 발근된 삽수를 정식하여 국화의 생육을 조사하였다. 1차 실험 에서는 배지에 혼합된 규소 함량이 많아질수록 초장과 근장이 길어졌다. 뿌리의 생체중과 건물중은 처리간에 차이를 보이지 않았다. 2차 실험에서는 분지수, 초장, 마디수, 경경을 조사한 결과 규산질비료 첨가구가 무첨 가구보다 생육이 우수하였고 건물률에서는 처리간의 유 의성이 없었다. 잎, 줄기, 뿌리의 생체중의 경우에도 무첨가구에 비해 첨가구가 높게 나왔다. 흰가루병은 규 산질 비료의 시용에 상관없이 모두 발생했다.

본 연구는 배지의 종류 및 부피가 절화 장미의 발근과 발근 후 생육에 미치는 영향을 알아보기 위하여 수행하였다. 실험은 유리온실의 철재 베드에 높이 1.5m의 아치형 터널을 설치하고 습도유지를 위하여 fog(200sec./5min. or 100sec./5min) 가습하고, 삽목초기에 차광률 55%의 한랭사로 차광하였다. 실험재료는 Rosa hybrida 'Red Sandra'와 'Little Marble' 두 품종을 사용하였다. 배지의 종류에 따른 발근 차이를 알아보기 위하여 10가지 배지(토실이 상토, 암면큐브, phenolic foam, perlite, vermiculite, 또는 perlite와 peatmoss 1:1, perlite와 coir 1:1, perlite와 rockwool 1:1, rockwool 1:1, rockwool과 peatmoss 1:1, rockwool과 coir 1:1, v/v)를 준비하여 삽목하였다. 발근배지의 부피에 따른 발근 및 생육의 차이를 알아보기 위하여 3가지의 배지(토실이 상토, 암면큐브, phenolic foam)를 각각 3가지 부피(3×3×3cm, 5×5×5cm, 7×7×7cm)에 삽목하였다. 배지의 종류를 달리한 실험은 두 품종 모두에서 Rockwool 1: Peatmoss 1 배지에서 발근과 생육에서 가장 좋은 결과가 나타났으며, 배지의 부피에 따른 발근율과 모든 생육은 배지의 용적이 커질수록 좋았다.