생육 초기에 투광량 증가가 인삼생육 및 지상부 병 발생에 미치는 영향 Effects of Enhanced Light Transmission Rate During the Early Growth Stage on Plant Growth, Photosynthetic Ability and Disease Incidence of Above Ground in Panax ginseng원문보기
This study was performed to investigate the effects of enhanced light transmission on plant growth, photosynthetic ability, and disease tolerance to leaf blight, anthracnose in ginseng (Panax ginseng C. A. Meyer, Araliacease family) during the early growth stage (April to June). The photosynthetic r...
This study was performed to investigate the effects of enhanced light transmission on plant growth, photosynthetic ability, and disease tolerance to leaf blight, anthracnose in ginseng (Panax ginseng C. A. Meyer, Araliacease family) during the early growth stage (April to June). The photosynthetic ratio, stomatal conductance, and stem diameter of plants grown under a shade net with 15% light transmission rate showed an increasing trend compared to the control plants (5% light transmission rate) although the growth of the aerial parts were not influenced significantly. Plant height, stem length, and leaf length of treated plants were not significantly different from those of the control plants. Root parameters, such as root length, diameter, and weight of treated plants increased significantly compared to the control. Yield performance ($187.4kg{\cdot}10a^{-1}$) of treated plants was 55.5% higher than that of the control ($150.4kg{\cdot}10a^{-1}$). Additionally, disease severity scores of treated plants were lower than those of the control plants, revealing higher survival rates. To retain high yield potential and enhance the level of disease tolerance in ginseng, we suggest the increase of light transmission rate during the early growth stage.
This study was performed to investigate the effects of enhanced light transmission on plant growth, photosynthetic ability, and disease tolerance to leaf blight, anthracnose in ginseng (Panax ginseng C. A. Meyer, Araliacease family) during the early growth stage (April to June). The photosynthetic ratio, stomatal conductance, and stem diameter of plants grown under a shade net with 15% light transmission rate showed an increasing trend compared to the control plants (5% light transmission rate) although the growth of the aerial parts were not influenced significantly. Plant height, stem length, and leaf length of treated plants were not significantly different from those of the control plants. Root parameters, such as root length, diameter, and weight of treated plants increased significantly compared to the control. Yield performance ($187.4kg{\cdot}10a^{-1}$) of treated plants was 55.5% higher than that of the control ($150.4kg{\cdot}10a^{-1}$). Additionally, disease severity scores of treated plants were lower than those of the control plants, revealing higher survival rates. To retain high yield potential and enhance the level of disease tolerance in ginseng, we suggest the increase of light transmission rate during the early growth stage.
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문제 정의
, 1989). Therefore, disease development was insufficient for evaluating plant tolerance against leaf blight in this study.
(2003) showed that leaf blight severity and defoliation degree of plants grown under a shade net with changing light transmission rate are lower compared to those grown under a shade net with fixed light transmission in the treatment plot of fixing light transmittance during ginseng growing seasons. Therefore, the objective of this study was to examine the effect of enhanced light transmission rate during the early growth stage on plant growth, photosynthetic ability, and disease tolerance to anthracnose blight and leaf blight in ginseng.
제안 방법
Data represent the mean (n = 4), Light transmission ratio, net photosynthetic ratio, stomatal conductance, soil moisture and soil temperature were measured between 9:00 am and 10:00 am on June 20, respectively.
The experiment was analyzed as a randomized block design using SAS (SAS institute Inc., Cary, NC, USA). Analysis of variance in conjunction with student’s t-test was applied to test the significance of mean differences among treatments at p < 0.
대상 데이터
The blue polyethylene shading net was opened from 17:00 pm the day before to 10:00 am the next morning for enhancing light transmission inside the shading structures without removing the blue shading sheets that reflected sunlight and protected from the rain. This treatment was conducted for about 60 days from April 23 to June 23 in 2014 at the Agricultural Experimental station of the National Institute of Horticultural and Herbal Science, Soi-myeon, Emsoung, Chungbuk Province, Korea.
데이터처리
Analysis of variance in conjunction with student’s t-test was applied to test the significance of mean differences among treatments at p < 0.05 and p < 0.01.
성능/효과
They showed that the development of ginseng roots increases with increasing light intensity and suggested that the optimum light transmission rate for root growth is between 10% and 15% of full sunlight. In this study, root parameters, such as root weight, root diameter, and root length of treated plants were significantly increased compared to the control plants. Yield performance (187.
Conidia and conidiophores were identified using stereoscopic and optical microscopes. Severity of leaf blight disease was scored on a 1 - 5 scale based on the proportion of leaf spot disease lesions (1; no disease symptoms observed, 2; only pencil-pointed or arrested spots on leaf, 3; symptoms on 25% of leaf area, 4; symptoms on 50% of leaf area, and 5; symptoms on more than 50% of leaf area). Severity of anthracnose blight disease was also scored on a 1 - 5 scale (1; no symptom observed, 2; more than 5 spots with lesions less than 2 ㎜ in diameter, 3; less than 10 spots with lesions less than 4 ㎜ in diameter, 4; less than 10 spots with lesions less than 6 ㎜ in diameter, and 5; more than 10 spots with lesions larger than 6 ㎜ in diameter).
후속연구
, 2012). That was probably because the unique growth parameters of ginseng develop very slowly (Jin et al., 2009); therefore, further study may be necessary to accurately investigate the same parameters at aged roots.
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