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RISS 인기검색어
- 검색키워드
- 저자 : 장미하 ( Mi Ha Chang ) (검색결과 2 건)
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Mi Ha Chang(장미하) 한국약용작물학회 2021 한국약용작물학회 학술대회논문집 Vol.2021 No.1
Background : Sub-irrigation system have recently been supplied little by little as a part of the field smart farm. Therefore, this study is being carried out examine to review availability of a sub-irrigation system in the medicinal crops (Platycodon grandiflorus and Rehmannia glutinosa). Methods and Results : The sub-irrigation system was buried at a depth of 40cm at 80cm intervals, and will have automatic irrigation and fertigation in the growth early and in the root and rhizome enlargement stage of Platycodon grandiflorus and Rehmannia glutinosa, respectively. In growth early, irrigation management will be treated by every 7 days such as the 7 days, 14 days, 21 days, 28 days, and until 35 days after sowing or transplanting, and in the root and rhizome enlargement stage will be automatically irrigated at -10kpa, -20kpa, and -30kpa of soil moisture content with control (non-irrigation). Also, fertigation at this time will be tested at EC 0.5, 1.0, 1.5, and 2.0 dS/m with control (non-treatment), respectively. Conclusion : Predicting the research results applied with the sub-irrigation system in medicinal crops, It is expected to be able to stably produce high-yields and high-quality in Platycodon grandiflorus and Rehmannia glutinosa regardless of climate change such as drought.
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연구보문 : 자연과학 ; 황산처리에 의한 불투수성 황근 종자의 발아촉진에 관한 연구
서상흠 ( Sang Heum Seo ),박민우 ( Min Woo Park ),장미하 ( Mi Ha Chang ),장일웅 ( Il Ung Jang ),심상인 ( Sang In Shim ),나영왕 ( Young Wang Na ),김수영 ( Soo Young Kim ),김석현 ( Seok Hyeon Kim ) 한국국제농업개발학회 2012 韓國國際農業開發學會誌 Vol.24 No.3
The reason of poor germination rate of hamabo mallow seed was speculated using TZ test to determine the viability of seed. Seeds showed high viability via TZ test were not germinated well. The quiescent seeds did not imbibed properly due to the hard seed coat and did not show further processes required for germination. Several well-known treatments for seed coat loosening and water uptake into seed were applied and compared for their efficiency. Stratification, hot water treatment, seed coat scarification, wet-cold treatment were revealed as less effective for improving germination although those treatments were common method for breaking dormant seed. Chemical scarification with sulfuric acid, however, effectively increased germinability and promptness index of hamabo mallow seeds. Optimal time for sulfuric acid treatment was 20 min. Seeds treated for 20 min showed improved germination percentage, germination speed, and promptness index of 80%, 13, and 1969 at 30 days after imbibition, respectively, in petri dish experiment. The values were greater than control seeds showed low values (12%, 1, and 183, respectively). The similar tendency was observed in the pot experiment that sulfuric acid treated seed were sown in artificially mixed soil (loamy soil:peatmoss:sand:compost = 5:2:2:1) and placed in greenhouse. Ultrastructure analysis of chemically scarified seed with sulfuric acid for 20 min by scanning electron microscopy did not show any noticeable changes in seed coat hardness and water uptake via hilum. But the only change after sulfuric acid treatment was removal of hilum cap that close the hilum and hider imbibition. Therefore, subsequent experiment was conducted to know the relationship between removal of hilum cap and facilitated imbibition by sulfuric acid treatment and whether the hilum cap removal directly influenced to the opening of micropyle. Water uptake velocity of seed treated for 20 min in concentrated sulfuric acid for was greater than control seed. This result implies that the crucial effect of sulfuric acid treatment is the removal of hilum cap that increase water uptake via micropyle in hamabo mallow.
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