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, $1000mg{\cdot}L^{-1}$ 용액에 5초간 침지하였고 또한 루톤 분제도 처리하였다. 삽목 90일 후 'Bluecrop'과 'Sunrise'품종의 발근율과 근중은 NAA $500mg{\cdot}L^{-1}$ 처리에 의해서 증가한 반면 'Duke' 품종에서는 IBA $500mg{\cdot}L^{-1}$가 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.
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, $1000mg{\cdot}L^{-1}$ 용액에 5초간 침지하였고 또한 루톤 분제도 처리하였다. 삽목 90일 후 'Bluecrop'과 'Sunrise'품종의 발근율과 근중은 NAA $500mg{\cdot}L^{-1}$ 처리에 의해서 증가한 반면 'Duke' 품종에서는 IBA $500mg{\cdot}L^{-1}$가 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 cutting...
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 $1000mg{\cdot}L^{-1}$ in 50% ethanol, and were also treated with Rootone$^{(R)}$ powder. Determined 90 days after cutting, the percent rooting and root weight were increased by NAA at $500mg{\cdot}L^{-1}$ in 'Bluecrop' and 'Sunrise', while in 'Duke' IBA at $500mg{\cdot}L^{-1}$ was effective. These auxin treatments were found to work better than a commercial product Rootone$^{(R)}$. 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.
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 $1000mg{\cdot}L^{-1}$ in 50% ethanol, and were also treated with Rootone$^{(R)}$ powder. Determined 90 days after cutting, the percent rooting and root weight were increased by NAA at $500mg{\cdot}L^{-1}$ in 'Bluecrop' and 'Sunrise', while in 'Duke' IBA at $500mg{\cdot}L^{-1}$ was effective. These auxin treatments were found to work better than a commercial product Rootone$^{(R)}$. 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.
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문제 정의
Thus the objectives of this study were to determine the effects of rooting agents on rooting and growth of the hardwood cuttings of highbush blueberries, and to investigate how the shading treatment imposed over the cutting bed influences their establishment success. Three highbush blueberry cultivars ‘Bluecrop’, ‘Duke’ and ‘Sunrise’ were used.
제안 방법
For both experiments, the propagation boxes (a box with 50 cuttings per treatment) in a plastic rain shelter were arranged in a completely randomized design for each variety, with three replicates. For comparing treatment means, Fisher’s least significant difference (LSD) was computed at a significance level of 5% by the SAS GLM procedure.
1. Immediately after the cutting, a single layer of black shade cloth of different shading levels (30, 50, 70 and 90%) was placed one meter over the cutting bed. This coverage remained for 90 days of the rooting period from early April to early July.
대상 데이터
Three highbush blueberry cultivars ‘Bluecrop’, ‘Duke’ and ‘Sunrise’ were used.
성능/효과
For comparing treatment means, Fisher’s least significant difference (LSD) was computed at a significance level of 5% by the SAS GLM procedure.
In conclusion, the percent rooting and root growth of hardwood cuttings of highbush blueberries were improved by application of rooting agents. For ‘Bluecrop’ and ‘Sunrise’ varieties, NAA at 500 mg · L−1 was most effective while in ‘Duke’ it was with IBA at 500 mg · L−1.
4% NAD, USA) did not promote rooting in all varieties except ‘Sunrise’, as compared to untreated control. It was noticeable that lower rates of IBA and NAA were more effective in inducing root formation than higher rates (Fig. 2). In untreated control, the percent rooting failure of the cuttings was found to be much higher in ‘Sunrise’ (76%) than ‘Bluecrop’ (18%) and ‘Duke’ (22%).
The results of shoot growth of the cuttings after 90 days of further culture in individual pots showed that shoot growth was generally increased by 30% shading but a significant increase occurred only in ‘Sunrise’ for the variables of shoot branch number and length (Table 4).
The root and shoot growth of the cuttings was determined 90 days after the cutting, and the results showed that in ‘Duke’ IBA at 500 mg · L−1 significantly increased root weight, shoot length and leaf number (Table 1).
The rooting percentage, which was determined 90 days after the cutting, was significantly increased by 28 and 37% with 500 mg · L−1 NAA for ‘Bluecrop’ and ‘Sunrise’ varieties, respectively (Fig. 2).
Three highbush blueberry varieties were used in this study, including ‘Bluecrop’, ‘Duke’ and ‘Sunrise’.
Overall shoot growth of the cuttings seemed to be positively related to the initial size of root development that was determined before transplanting rooted cuttings into individual containers (data not shown). Using the data pooled across all varieties and treatments, we correlated shoot growth parameters with initial root weight and found that there were significant relationships between root weight and shoot length (R2 = 0.48, P = 0.0015) and between root weight and leaf number (R2 = 0.35, P = 0.0098). However, parameters such as shoot branch number and branch diameter were little correlated with root weight.
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