보고서 정보
주관연구기관 |
국립원예특작과학원 National Institute of Horticultural and Herbal Science |
보고서유형 | 최종보고서 |
발행국가 | 대한민국 |
언어 |
한국어
|
발행년월 | 2016-02 |
과제시작연도 |
2015 |
주관부처 |
농촌진흥청 Rural Development Administration(RDA) |
등록번호 |
TRKO201600003213 |
과제고유번호 |
1395041250 |
사업명 |
원예특작시험연구 |
DB 구축일자 |
2016-06-25
|
DOI |
https://doi.org/10.23000/TRKO201600003213 |
초록
Ⅳ. 연구개발결과
○ 신형 블라인드 해가림시설 개발: 차광지 세로경사 등 5종
- 시설 천장 통기로 관행대비 내부 최고온도 2℃ 하락
○ 단위면적당 수량 약 250% 증대
- 재식본수(30%) 및 개체중(2배) 증가
○ 노동력 절감 및 농작업 환경 개선
Abstract
▼
Ginseng (Panax ginseng C. A. Meyer, Araliacease family) is one of the most important perennial herbaceous plants because of its widely known medicinal efficacies. It has been used for long in herbal medicine and therapy, especially in Asian countries such as Korea, China, and Japan. Ginseng growth a
Ginseng (Panax ginseng C. A. Meyer, Araliacease family) is one of the most important perennial herbaceous plants because of its widely known medicinal efficacies. It has been used for long in herbal medicine and therapy, especially in Asian countries such as Korea, China, and Japan. Ginseng growth and yield potential are affected by a variety of factors such as light intensity, temperature, soil moisture content, and inorganic nutrient. Light saturation point of Korean ginseng is 11,000 lux at 15℃ - 20℃ and about 9,500 lux above 25℃. The light saturation point, as well as photosynthetic capacity, was shown to be significantly influenced by leaf and air temperature. However, light intensity is probably the most important factor to promote photosynthetic ability in ginseng and is related with growth and yield potential. When the ginseng grows under low light intensity, root growth is remarkably decreased due to slow assimilation with declining photosynthetic ability. Ginseng is a semi-shade plant with high death rate at high light intensities and its cultivation is performed under shade conditions during the entire growth season. Cheon reported that when light intensity is too high, chlorophyll content and photosynthetic ability, which are highly related with growth and yield potential, are remarkably decreased. Ginseng leaves that are exposed to monochromatic light, such as far-red and red, for a long time show leaf-bleaching symptoms. Ahn et al. reported that the content of thylakoid membrane proteins in leaves exposed to high light intensity is lower than in the leaves exposed to low light intensity. Cho et al. reported that when ginseng is grown at high light intensity, leaves show symptoms of physiological disorder, such as the chlorosis; the hypodermis is remarkably increased with less phloem development inside the vascular tissue; the roots show epidermal destruction caused by decreased cambium development. Two major diseases in ginseng, anthracnose blight disease caused by Colletotrichum gloeosporioides and leaf blight disease by Alternaria panax, decrease yield performance because of defoliation before root enlargement. Disease outbreak and growth of pathogens are highly related with light quality, air temperature, soil moisture, humidity, and plant growth stage. However, Cheon et al. 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. 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 (187.4 ㎏• 10 a−1) of treated plants was 55.5% higher than that of the control (150.4 ㎏• 10 a−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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