• 임산에너지
• /
• 제19권1호
• /
• pp.13-19
• /
• 2000

This study was aimed to investigate the effect of several stimulatory trements of flower and seed growth on the reproductive and vegetative growth of Tilia amurensis RUBP. The effects of mounded planting, girdling, root-pruning, bending and foliar fertilizer application on the fifteen to forty yead-old tress growing in the experimental plantation at the Konkuk University and the National forest at the Daegwanryung were measured. The following results were obtained: (1) The number and the longitydinal growth of internode were reduced by the treatments. The xylem growth of the longitudited more greatly than the bark growth by all the treatments. (2)The increasong rate of the brand angle as compared to that of the control was 2.11% in the girdling treatment, 31.61% in the mounded planting treatment, and 22.14% in root-pruning treatment. (3) The foliar application of fertilizer(N, P, K, and B) before flowering increased leaf and stem growth, that one after pollen fertilization increased the fruit growth. (4)The foliar application of fertilizer before flowering increased the xylem growth while that after pollen fertilization increased the bark growth. (5)The stimulatory effects of root pruning and branch bending on the flowering and seed growth were shown relatively less than that of mounded planting. The effect of the moinded planting on the yield of the seeds has remained continuously every year since planting the trees.

• 한국작물학회지
• /
• 제45권5호
• /
• pp.282-287
• /
• 2000

Soybean [Glycine max (L.) Merrill] crops, grown in a rice soybean rotation, can suffer when grown in soil with excessive moisture. The objective of this work were to determine the reduction in growth and yield, responses of vegetative and reproductive growth of soybean to excessive soil moisture achieved by prolonged irrigation. Responses of different cultivars were determined at growth stages from V6 to R8 to clarify the sensitive growth stages or characteristics to excessive soil moisture. Cultivar differences in response to excessive soil moisture condition were conspicuous in seed dry weight and harvest index (HI) but not in the response of seed number or pod number per plant. The timing of irrigation causing the condition of excessive soil moisture influenced the vegetative or reproductive traits. Soybean plants were more affected by irrigation commencing at the pre-flowering than at the post-flowering stage. Post-flowering irrigation did not reduce growth of vegetative organs significantly; in fact the growth of stems and leaves was facilitated by the prolonged irrigation commencing at flowering. Differences between cultivar response to prolonged irrigation were assumed to relate to the reduced amount of assimilates translocated to the reproductive organ.

• 한국작물학회지
• /
• 제47권4호
• /
• pp.269-272
• /
• 2002

This study was carried out to investigate varietal differences on growth characteristics under the conditions of PE film-mulching and non-mulching in sesame. At maturing stage from 76 to 95 days after sowing, Yangbaeckkae, non-branching plant type, under non-mulching showed larger leaf area index (LAI) than that of film-mulching, while plant height and the number of capsules per plant were similar to those of film-mulching. LAI of Ahnsankkae, branching plant type, under non-mulching was similar to film-mulching, while plant height and the number of capsules per plant were smaller than those of film-mulching. Net assimilation rate (NAR) of two varieties under non-mulching was lower at seedling stage from 25 to 35 days after sowing but higher at flowering stage from 45 to 55 days after sowing. At maturing stage from 66 to 77 days after sowing, NAR and crop growth rate (CGR) of Yangbaeckkae under non-mulching were greater than those of film-mulching, whereas those of Ahnsankkae under non-mulching were lesser than those of film-mulching. Yield under non-mulching was decreased by 7 % in Yangbaeckkae and 33 % in Ahnsankkae compared with that of film-mulching, therefore Yangbaeckkae was more adaptable for non-mulching than Ahnsankkae. Main factors decreasing yield of Yangbaeckkae under non-mulching were small LAI, NAR, and CGR at the stage of young seedling, and small number of capsules at early maturing stage from first flowering to 20 days after first flowering.

• 한국환경복원기술학회지
• /
• 제24권5호
• /
• pp.15-23
• /
• 2021

This study was carried out to suggest an appropriate plant combination by evaluating the growth of flowering ground-cover plants planted with Festuca glauca 'Eljiah Blue' on the roof-top environment. As for the plant materials, Allium senescens and Chrysanthemum coreanum which are shorter than Festuca glauca 'Eljiah Blue' and Sedum takesimense and Agastache rugosa which are taller than Festuca glauca 'Eljiah Blue' were selected. Festuca glauca 'Eljiah Blue' was planted on Conrol, and Festuca glauca 'Eljiah Blue' with Allium senescens (T1), Festuca glauca 'Eljiah Blue' with Sedum takesimense (T2), Festuca glauca 'Eljiah Blue' with Agastache rugosa(T3), and Festuca glauca 'Eljiah Blue' with Chrysanthemum coreanum (T4) were planted in each experimental plot. Plant height and covering rate were measured to evaluate the growth of Festuca glauca 'Eljiah Blue'. Also, relative growth rate (RGR) of plant height, RGR of plant width, and mortality rate of the flowering ground-cover plants were estimated. Plant height and cover rate of Festuca glauca 'Eljiah Blue' was greatest in T3. RGR of plant height was greater in the order of Agastache rugosa, Allium senescens, Chrysanthemum coreanum, and Sedum takesimense. In particular, RGR of plant width was also greatest for Agastache rugosa. Mortality rates of Agastache rugosa and Allium senescens were lowest at 11%. Therefore, based on good growth of Festuca glauca 'Eljiah Blue' planted with Agastache rugosa, these results were suggested as a desirable combination of plant species for rooftop gardening.

• 원예과학기술지
• /
• 제16권4호
• /
• pp.531-532
• /
• 1998

본 연구는 철골소심(鐵骨素心)의 개화율 향상을 목적으로 BA 처리농도 및 적정시기를 구명하고자 실시하였다. BA 처리농도가 높을수록 개화율이 높아졌으며 $400mg{\cdot}L^{-1}$ 처리시 100% 개화하였으나 상대적으로 기형화 발생율이 높아 개화율을 높이기 위한 BA의 적정농도는 $300mg{\cdot}L^{-1}$으로 생각되었다. BA 처리시기에 따른 개화반응은 6월 부터 8월까지 처리한 것은 개화하였으나 4월, 5월, 9월 처리에서는 개화가 되지 않았다. 따라서 철골소심(鐵骨素心)의 개화에 적합한 BA 처리 농도는 $300mg{\cdot}L^{-1}$이었으며 처리적기는 8월말이 가장 많은 개화수와 꽃대를 생산하였다.

• 한국작물학회지
• /
• 제49권4호
• /
• pp.325-330
• /
• 2004

This study was carried out to determine adequate planting date, to compare the growth characteristics between early and late maturing cultivars, and to provide the data for the cultivation techniques of soybean [Glycine max (L.) Merr.] in double cropping system with winter crops on paddy field in Korea. Cultivars were planted on 26 May, 16 June, and 7 July with a planting density of $70cm(row\;widtb)\;{\times}\;10cm$ (planting spacing). Seed yield of soybean planted on June 16 and July 7 was approximately $37\%\;and\;53\%$, respectively, less than that of conventional planting date of May 26 in Pungsan-namulkong, and planted on June 16 and July 7 was about $30\%\;and\;37\%$, respectively, less then that of conventional planting date of May 26 in Hanamkong. The number of pods and seeds per plant decreased as planting date delayed. Seed weight increased in Pungsan-namulkong but decreased in Hannamkong as planting date delayed. The flowering date was late in delayed planting plots, but it was shorted for days from emergence to flowering and from emergence to maturity. The plant height of Hannamkong was greater than Pungsan-namulkong from the emergence to flowering stages, but in contrast, it was greater in Pungsan-namulkong than Hannamkong after flowering stage (50d after emergence) when it planted on May 26. There were no significant differences between two soybean cultivars at planting dates of June 16 and July 7. Leaf number, leaf area, and dry matter were also reduced by late planting, and Both of them were shown in high reduction at the later planting. There was a high significant difference at the flowering $(r\;=\;0.87^{**})$ and pod formation $(r\;=\;0.91^{**})$ stages between leaf dry matter and seed yield. Crop growth rate (CGR) was greater at $R2\~R3$ growth stages compared to $R3\~R4\;or\;R4\~R5$ growth stages in two soybean cultivars and the greatest CGR was obtained at planting date of May 26 in two soybean cultivars except for R4-R5 growth stage in Pungsan-namulkong. There was a highly significant positive difference between the seed yield and the leaf area index (LAI) across R3 to R4 and R2 to R3 stages. The photosynthetic rate $(P_N)$ of the uppermost leaf position had no significant difference among planting dates and between two soybean cultivars. However, $P_N$ of the $7^{th}$ leaf position increased as the planting date delayed.

• 화훼연구
• /
• 제18권1호
• /
• pp.38-43
• /
• 2010

우리나라에 자생하는 하늘나리(Lilium concolor var. parthneion)와 날개하늘나리(L. dauricum)를 소형 분화로 개발하기 위해 생장억제제의 줄기 신장 억제 및 개화촉진 효과를 구명하였다. 조직배양으로 얻어 포장에서 1차 비대시킨 후 생체중이 각각 5-7g과 3-4g인 인경을 각각 0, 25, 50과 $100mg{\cdot}L^{-1}$의 ancymidol, diniconazole과 uniconazole 수용액으로 침지, 분무 또는 관주처리 하였다. 하늘나리에 있어서는 uniconazole 침지처리가 초장을 가장 크게 감소시켰는데, 그 농도에 따라 10.2-18.5cm로 대조구에 비해 60.7-78.3% 억제되었으며, 개화율은 농도에 관계없이 100%였다. 날개하늘나리의 경우, diniconazole 침지처리에서 줄기 신장의 억제 효과가 가장 커서, 초장은 농도에 따라 3.2-7.0cm로 대조구에 비해 70.0-86.3%나 억제되었으며, 개화율은 대조구의 0%에서 8.3-18.2%로 향상되었다. 그리고 ancymidol $25-50mg{\cdot}L^{-1}$의 관주처리도 날개하늘나리의 줄기 신장억제와 개화 촉진에 효과적이었다. 따라서 하늘나리와 날개하늘나리의 인경을 이용한 소형 분화 생산에는 각각 uniconazole $50-100mg{\cdot}L^{-1}$ 침지, 그리고 diniconazole $25mg{\cdot}L^{-1}$ 침지 또는 ancymidol $25mg{\cdot}L^{-1}$ 관주처리가 적합하다고 판단된다. 단, 본 연구에 사용된 날개하늘나리의 인경은 크기가 너무 작아 분화로서 상품성이 없었기 때문에 좀더 큰 구근을 사용한 연구가 필요하다.

• 화훼연구
• /
• 제18권2호
• /
• pp.142-146
• /
• 2010

순백색 바탕에 자주색 화심이 있는 조생종 글라디올러스 '아리랑'이 1998년 국립원예특작과학원(구 원예연구소)에 의해 개발되었다. '아리랑'은 어두운 오렌지색 조생종 '아리안느'에 밝은 홍적색 대형종 국산품종인 '홍광'을 교배한 조합에서 선발되었다. 1993년에 교배하여 얻은 실생 종자를 파종, 1994년에 처음 선발하였으며 1998년까지 5년에 걸쳐 생육특성검정을 하였다. 아리랑은 밝은 백색바탕에 자주색 화심이 있는 절화용 품종으로 조생종이면서 꽃대가 휘지 않는 강한 초세를 갖고 있다. 따라서 여름철 노지 재배용으로 이용이 가능하다. 또한 장마철 습해에도 강하고 구근부패병에 강해 장마철 절화가 가능한 품종이다. 생육속도는 매우 빠르며 구근 번식력도 좋다. 아리랑의 여름철 개화소요일수는 75일 정도이며 구근 생산재배 시 품질 좋은 구근생산을 위해 생육 기간 중 추비를 1-2회 뿌려 주는 것이 좋다.

• 화훼연구
• /
• 제16권4호
• /
• pp.260-265
• /
• 2008

수국의 분화 생산을 위하여 온도, 입실시기 및 $GA_3$ 처리가 수국의 생장 및 개화에 미치는 영향을 구명하기 위하여 실험한 결과는 다음과 같다. 온도처리별 초장은 $20^{\circ}C$의 6.7 cm에 비해 $5^{\circ}C$에서 38cm로 현저히 길어졌으며 경장도 같은 경향이었다. 엽장 및 엽폭은 온도처리가 낮을수록 넓어졌으며, 줄기직경은 굵어지는 경향이었다. 개화시는 $5^{\circ}C$에 비해 $15^{\circ}C$ 및 $20^{\circ}C$에서 현저히 단축시킬 수 있었으며, 개화소요일수는 $5^{\circ}C$의 161일에 비해 $15^{\circ}C$에서 88일 소요되었다. 개화율은 온도 처리별 75.8~90.7% 정도이었다. 입실시기별 초장은 입실시기가 늦어질수록 길어졌으며, 엽장 및 엽폭도 같은 경향이었다. $GA_3$ 처리시 초장은 대조구에 비해 $GA_3$ 처리 농도가 높을수록 증가하였고, 엽장 및 엽폭도 같은 경향이었다. 개화시는 12월 30일 입실시 대조구 3월 17일에 비해 $GA_3$ $50mgL^{-1}$ 처리시 7일 조기개화되었고, 개화소요일수는 입실시기가 늦을수록 크게 단축되었다. 화방폭은 12월 30일 입실시 대조구에 비해 $GA_3$ 처리시 증가되었고, 개화율은 1월 15일 $GA_3$ $50mgL^{-1}$ 처리 97.9%에 비해 11월 15일 대조구에서 62.3%로 현저하게 감소하였다.

• 한국초지조사료학회지
• /
• 제28권1호
• /
• pp.13-18
• /
• 2008

본 시험은 우선 논에서 여름철 사료작물과 연계할 수 있는 겨울철 재배에 적합한 월년생 두과작물로 이듬해의 개화를 통한 경관효과와 수량이 우수한 초종의 선발을 목적으로 충남 천안시 성환읍에 위치한 벼재배 농가포장에서 2006년 9월부터 2007년 5월까지 수행되었다. 월년생 두과 사료작물로서 Hairy vetch(Vicia villsa), Crimsom clover(Trifolium incarnatum), Berseem clover(Trifolium alexandrinum), Persian clover(Trifolium resupinatum), Balansa clover(Trifolium michelianum), Sweet clover(Melilotus officinalis) 및 Forage pea(Pisum sativum) 각 1품종을 공시하였다. 파종 45일후 출현율은 Crimsom clover, Hairy vetch, Forage pea 및 Berseem clover가 90%이상으로 높았으며 월동율은 Hairy vetch와 Crimsom clover가 각각 98%와 95%로 가장 높았다. 경관과 관계되는 개화율은 수확시(5월 10일)에 Crimson clover가 100%로 조사되었다. 생초수량과 건물수량은 Crimson clover가 각각 72,556 kg/ha과 16,062 kg/ha으로 가장 높았다. 조단백질 수량은 Hairy vetch가 2,929 kg/ha으로 가장 높았지만 Crimson clover(2,169 kg/ha)와는 차이가 없었다(p<0.05). TDN 수량은 Crimson clover가 9,007 kg/ha으로 가장 높았지만 Hairy vetch(7,366 kg/ha)와는 차이가 없었다(p<0.05). 이상의 결과로부터 월동율, 수량 그리고 경관 등을 고려할 때 Crimson clover가 가장 적합한 것으로 사료되지만 추후 보완 연구가 필요하다고 사료된다.