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천영신,하수현,정경진,윤재길 한국화훼학회 2016 화훼연구 Vol.24 No.2
Chrysanthemums (Dendranthema grandiflorum ‘Iwanohakusen’) were grown in a greenhouse with complete nutrient solution system to investigate the effect of silicon (Si) supplement on salt induced deleterious effects in chrysanthemum plants. The experiment was conducted in plastic pots supplemented with a mixture of upland soil : leaf mold : river sand (3:3:4, v:v:v). Si and salinity were treated in combination with two levels of NaCl (0 and 100 mM) and two sources of silicon (K2SiO3, KSi and silicate fertilizer, SiF) at the same concentration (1.8 mM Si) by weekly-drenching for 12 weeks. Chrysanthemum plants supplemented with Si increased in fresh and dry matter enhancing water content and salinity tolerance. The plants grown under salt stress produced less fresh and dry matter than control plant. However, Si supplement to plants under salt stress ameliorated negative effects of salt stress. In soil, EC and NaCl increased by salt stress were mitigated by Si supplement. Salt stress significantly decreased the contents of K and P in leaf, but Si supplement under salt stress significantly recovered the decreased contents with enormous desorption of K and P in soil. Added Si significantly increased content of available SiO2 with its adsorption by salt stress in soil, which was directly related to Si accumulation in leaf. However, Si uptake by roots was suppressed by salt stress irrespective of Si supplement. Si supplement did not ameliorated the negative effects of salt stress on chlorophyll content and membrane integrity in leaf of chrysanthemum plant although significantly increased Si content in leaf, but reversed pest (Liriomyza trifolii) resistance to above-control level.
여름철 미스트 처리가 절화 장미 ‘한마음’의 생육과 품질에 미치는 영향
천영신(Young Shin Chon),하수현(Su Hyeon Ha),정경진(Kyeong Jin Jeong),최경옥(Kyoung Ok Choi),윤재길(Jae Gill Yun) 한국원예학회 2013 원예과학기술지 Vol.31 No.5
During summer in Korea, the excessively high temperature causes growth retardation and quality reduction in cut roses grown in greenhouse. Mist treatments were conducted to reduce the temperature and avoid quality reduction of cut roses. The temperature change in the greenhouse, growth and quality of cut roses, and injuries caused by insects or fungi were investigated during mist treatment. Daily maximum temperature reduced as the number of mist treatment increased, resulting in 6°C reduction by mist treatment for 10 seconds at 5 min interval. This temperature reduction occurred only when maximum temperature was over 40°C in greenhouse, and not when it was less than 40°C or rainy and/or cloudy day. Plant height and fresh weight of the cut roses were increased at the range of 10-20% by mist treatment. As frequency of mist treatment increased, however, malformed flowers increased and vase life of cut rose was largely shortened. The injuries by insects like as beet armyworm larvae and scale insect increased as well. In conclusion, it is recommended that mist treatment must be used when the daily maximum temperature in a green house is over 40°C and forecasting for disease or insects should be conducted as well.
능유바위솔의 분화 재배시 광도, 분용토, 시비 수준에 따른 생육과 품질의 변화
천영신(Young Shin Chon),이상우(Sang Woo Lee),정경진(Kyeong Jin Jeong),하수현(Su Hyeon Ha),배종향(Jong Hyang Bae),윤재길(Jae Gill Yun) (사)한국생물환경조절학회 2011 생물환경조절학회지 Vol.20 No.4
능유바위솔을 분화로 재배하고자 할 때, 적정 광도와 내음성정도, 적정 분용토, 그리고 적정 시비조건을 알아보기 위해 실험을 수행하였다. 그 결과 능유바위솔은 52% 차광에서 생육이 가장 양호하였으며, 82% 차광까지는 생육이 감소하기는 하지만 상품성은 유지되어 내음성이 뛰어난 것으로 판단되었다. 90% 이상의 차광에서는 고사주가 발생하였으며, 엽색도 탈색되고 잎이 위로 서는 등 관상가치가 크게 저하되었다. 분용토로는 마사토 : 유비상토 : 강모래(6 : 2 : 2, v/v/v)에서 생육이 가장 좋았다. 특히 지상부 생체중의 경우 다른 용토에서는 약 4~8g 범위였으나, 마사토 : 유비상토 :강모래(6 : 2 : 2, v/v/v)에서는 16g으로 2배 이상의 생육량을 보였다. 시비조건은 Hyponex 액비를 1,000~2,000배액으로 1회/주 처리했을 때, 생체중 및 초폭, 분지수 등에서 가장 좋게 나타났다. 특히 생체중의 경우 대조구(무처리)가 16g인데 비해 1,000배액 1회/주와 2,000배액 1회/주 처리에서 약 29g으로 80% 정도 생장량이 증가하였다. 엽색에서는 액비의 농도가 높을 수록 엽색이 짙어지는 경향이 보였다. Proper light intensity, potting media, fertilization level, and shade tolerance were investigated to develop Orostachys (Korean name, Nungyu bawisol) as a potted ornamental plant. The best plant growth was shown at 52% shading. Although plant growth decreased at 82% shading, ornamental value maintained at that shading rate, which indicate that O. ‘Nungyu bawisol’ has high shading tolerance. At over 90% shading, some of the plants died and showed decolorization and standing erect in leaves, resulting in a big decrease in ornamental value. Potting medium of decomposed granite (DG) : fertilizer-amended media (FAM) : river sand (RS) (6 : 2 : 2, v/v/v) showed the best growth in potted O. ‘Nungyu bawisol’. Fresh weight of shoot part was 16 g in DG : FAM : RS (6 : 2 : 2, v/v/v), which was over 2 folds of those at the other medium. Drenching of Hyponex solution diluted by 1,000~2,000 folds 1 time per week brought the highest results in fresh weight, plant width, and runner number. Particularly, fresh weight of shoot part was 13 g higher than that of control (16 g). Leaf color tended to be darkened as concentration of Hyponex solution increased.
천영신(Young Shin Chon),정경진(Kyeong Jin Jeong),윤재길(Jae Gill Yun) 인간식물환경학회 2014 인간식물환경학회지 Vol.17 No.4
To improve commercial value of pot Digitalis purpurea, paclobutrazol(1~20 mgㆍL⁻¹) and uniconazole(1~8 mgㆍL⁻¹) were sprayed on the leaves including flower buds. Both of plant growth retardants(PGRs) reduced the plant height and flower stalk length, and their dwarfing effect became larger as concentration of PGRs increased. The most proper concentration of PGRs to produce pot digitalis with adequate plant height was 1~2 mgㆍL⁻¹ in uniconazole, and 1~3 mgㆍL⁻¹ in paclobutrazol. The first flowering date was delayed by foliar sprays of two PGRs by 6 days, but the period to final flowering date was very close between control and treatments. PGRs reduced final flowering rate by 10% compared to control, and number of floret and chlorophyll content were decreased with high concentration of the PGRs. Correlation between PGRs and investing items evaluated were analyzed. Linear relationship between PGRs and plant height or flower stalk length was very high(R≥0.8). However, linear relationship between PGRs and floret number was low level(R=0.57~0.65).