• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.39 no.5
• /
• pp.453-457
• /
• 1994

Six local strains collected in Korea and one cultivar (Samdo) introduced from Japan were applied for comparative cultivation to investigate growth characteristics, root yield potentials and saikosaponin contents of root in Bupleurum falcatum L. The one and two year old plants of the native local strains flowered in August 2~3 and July 16~18, respectively, whereas Samdo was late flowering type, being delayed by 18~32days and sustained the growth of above ground parts to the end of November. All the native local strains have similiar characteristics but Samdo was completely different in plant and root type. Local strain collected from Chunchon showed better in growth and root characteristics, consequently resulting high yield of dry roots and saikosaponin contents in both one and two year old plants. The average yield of two year cultivation system was 2.6 times high as 105Kg /10a, compared with that of one year.

• Korean Journal of Medicinal Crop Science
• /
• v.14 no.3
• /
• pp.134-138
• /
• 2006

The result that test 3 years since 2002 allowing 6 processing such as $40{\times}5\;cm$ to supply basis data of method of cultivation establishment investigating productivity of Saururus chinensis by the number of cultivation years and planting distance, is as following. Plant height of foliar growth was good 1 year eats little, but 2 years planting distance $40{\times}10\;cm$, 3 years was best in $40{\times}20\;cm$ and there were many the number of tillerings 1, 2, all 3 years do high plant density, and rhizoma growth is 1, 2 years does high plant density, it was good tendency, but 3 years is best in $40{\times}20\;cm$. 1 year is most in planting distance $40{\times}5\;cm$, 2 years $40{\times}10\;cm$, 3 years $40{\times}20\;cm$, $1{\sim}2$ year accumulation quantity $40{\times}10\;cm$, $1{\sim}3$ year accumulation quantity $40{\times}10$, 20 cm in goods foliar amount.

• Journal of Korean Society of Forest Science
• /
• v.35 no.1
• /
• pp.9-14
• /
• 1977

The productive structure and the productivity of ${\times}$Populus albaglandulosa plantations, where are middle parts of the Korean peninsula, were studied by means of stratifying clip technique and of allometry. The densities of stands in the sample areas were 693 trees/ha in 6 year-old plantation and 527 or 625 trees/ha in 9 year-old one. The photosynthetic part of the productive structure was not shown normal conical form but layering. So this was efficient to transmit solar radiation into the stand floor. The standing crop of the terrestrial parts of 6 year-old plantation was 18.11 ton/ha and that of 9 year-old one 38.8 to 47.3 ton/ha. The wood volume to trunk to 6 year-old was $31.3m^3/ha$ and that of 9 year-old was 68.8 to $83.9m^3/ha$. The annual net production of 6 year-old plantation was 4.8 ton/ha/year and that of 9 year-old one was 10.0 to 11.7 ton/ha/year and its wood volume of trunks was 17.9 to $21.1m^3/ha/year$. In the 9 year-old plantation the standing crop or the annual net production was different between two sample areas. This seemed that the cause was not due to chemical character but to physical character of soil.

• Korean Journal of Medicinal Crop Science
• /
• v.7 no.4
• /
• pp.282-287
• /
• 1999

This study was conducted to investigate the effects of different soil texture in agronomic characteristics, root yield and quality of baloon flower (Platycodon grandiflorum A. DC.). Three kinds of soil texture, sandy loam, silt loam and clay loam, were tested for two years. Baloon flowers were seeded with 20cm row space and cultivated in the one square meter pot with 0. 6m depth. Fifty plants per pot were remained. In growth characteristics of one-year-old plants, shooting date was not significantly different according to the changes of soil texture. The ratio of stem growth was highest between July and August. In two-years-old plants, it was showed between May and June. Plants grown on clay loam showed the highest growing characteristics than those of other soil textures. Dry root weight cultivated on clay loam was 274kg/10a in one-year-old and 934kg/10a in two-years-old plants. The content of ethanol extracts from root was highest at those of sandy loam as 47.1 % in one-year-old root. The crude saponin content was not different significantly among the three kinds of soil texture.

• Journal of Korean Society of Forest Science
• /
• v.111 no.3
• /
• pp.394-404
• /
• 2022

This study was conducted to optimize the amount of drip irrigation for Prunus×yedoensis Matsum., one of the major medium-sized landscaping trees used mainly for streetscapes and as ornamentals. The experiment was conducted in a container nursery, where we assessed the growth and physiological characteristics of 4- and 8-year-old seedlings watered at different rates (x) by a drip irrigation system. The relative growth rates (based on height and root collar diameter (RCD) measurements) were highest at 288 and 416 L/year/tree for the 4- and 8-year-old containerized seedlings, respectively. These age and treatment combinations also produced significantly different dry weight and seedling quality index values, indicating good growth. The two age groups had significantly different total root lengths, root diameters, and root volumes under these respective irrigation treatments. In addition, the 4-year-old containerized seedlings irrigated at 288 L/year/tree and the 8-year-old containerized seedlings irrigated at 416 L/year/tree had the highest activations in their chlorophyll contents. Overall, the results (differences in irrigation amounts affect the seedlings morphological relative growth, biomass growth, seedling quality, and physiological reaction) indicate that the optimal irrigation amounts for container-grown Prunus×yedoensis are 288 L/year/tree for 4-year-old (RCD class, 3cm) and 416 L/year/tree for 8-year-old (RCD class, 7 cm) containerized seedlings.

• Korean Journal of Ichthyology
• /
• v.30 no.1
• /
• pp.46-54
• /
• 2018

The habitat characteristics and the age of endangered miho spine loach, Cobitis choii, were investigated in Ji Stream, Guem River, Korea in 2011 to provide baseline data for its restoration. The habitat of the C. choii was the downstream portion composed of sand, and the sand particle sizes was mostly 0.21~1.18 mm (88.7%). Juveniles (age 0+) preferred slower water velocity (0~25 cm/sec) and a lower water depth (5~20 cm) than did individuals who were more than 1 year old, as this group inhabited rapids with 10~25 cm/sec of water velocity and 20~50 cm of water depth. The C. choii rapidly grew during the active period from April to October and they stopped growing during the hibernating period from November to March. The estimated age of the C. choii (females) based on their total length distribution during the spawning period (June) indicated that 1-, 2-, 3- and more than 4-year-old were 40~61 mm, 64~79 mm, 80~91 mm and 92~106 mm, respectively.

• Proceedings of the Plant Resources Society of Korea Conference
• /
• 2020.08a
• /
• pp.64-64
• /
• 2020

우리나라의 고사리 재배면적은 2018년 기준 5,406ha 수준을 보이고 있으며 전체 산채류 재배면적에서 가장 높은 비중을 차지하고 있다. 고사리(Ferns)는 고사리 속(Pteridium spp.)에 속하는 양치식물의 총칭으로서 우리나라에는 22과 70속 272종이 분포되어 있는 것으로 보고되었다. 고사리의 어린 순에는 가식부 100g 당 칼슘 15.0mg, 칼륨 185.0mg 등이 함유되어 있으며 골다공증, 심혈관 질환 등에 효과가 있고 식이섬유로 인해 변비 예방에도 유용한 것으로 알려져 있다. 고사리 뿌리에서 추출한 전분은 중국 및 일본 등지에서 면류나 제과용으로 이용되고 있어 고사리 재배의 부가가치를 향상시킬 수 있는 방안으로 기대되고 있다. 본 연구에서는 고사리의 재배년차간에 뿌리 전분의 생산성과 이화학적 특성을 조사하기 위해 2020년 3월 26일 각 재배년차별로 굴취한 뿌리를 세척 후 고무망치로 파쇄하고 수침 방법을 사용해 추출한 전분의 이화학적 특성을 조사하였다. 재배년차간 고사리 뿌리의 생산성은 5년생과 7년생에서 3,000 kg/10a 이상으로 유의하게 높은 수량을 보였다. 세척한 고사리 뿌리를 24시간 sodiun metasulfite 4% V/W 용액에 수침하여 전분을 추출한 후 24시간 간격으로 3회에 걸쳐 진탕, 침전과 세척의 과정을 거친 후 조사한 전분 추출 수율은 뿌리 생체중 대비 6.8~7.6% 수준이었으며 재배년차간 차이는 없었다. 추출한 전분의 색도분석에서 L 값은 재배년차가 높아질수록 낮아지는 경향을 보였으나 a 값은 3.7~4.8, b 값은 13.5~15.9로서 뚜렷한 차이를 보이지 않았다. 고사리 뿌리전분의 호화특성에서 최고점도는 3년생 고사리 뿌리에서 추출한 전분이 557.4 RVU로 높은 값을 보였으나 재배년차간 통계적 유의성을 인정할 수는 없었으며, 최저검도에서는 5년생에서 추출한 전분이 269.9RVUfh 낮은 경향을 보였다. 또한 최대 점도 시간은 5.0~5.2hr로 재배년차간 차이는 없었으며 호화 저지온도는 67.0~68.9℃ 범위로 유의한 차이를 보이지 않았다. 고사리 뿌리에서 채취한 전분의 무기물 함량을 조사한 결과 황의 함량은 1년생에서 0.081%로 유의하게 높았으며, 인산 함량은 3년생에서 72mg/kg으로 가장 높았고 1년생에서 31mg/kg으로 가장 낮은 값을 나타냈다. 칼륨의 함량은 7년생에서 추출한 전분에서 376.3mg/kg으로 높았으나 재배년차 간 뚜렷한 경향을 보이지 않았으며 칼슘, 마그네슙 및 철분 함량에서는 5년생 전분에서 유의하게 높은 경향을 보였다.

• Korean Journal of Ichthyology
• /
• v.28 no.2
• /
• pp.93-99
• /
• 2016

Spawning period and spawning characteristics of Kichulchoia multifasciata (Pisces: Cobitidae) inhabiting the Yugokcheon (stream) of Nakdonggang (river) were investigated in the area of Segangyo (bridge), Yugok-myeon, Uiryeng-gun, Gyeongsannam-do, Korea from November 2008 to October 2009. The total length of population indicated that 45~55 mm group is one year old, 55~75 mm group is two years old and longer than 75 mm is regarded over three years old in males and 40~55 mm group is one year old, 55~75 mm group is two years old, 75~95 mm group is three years old and longer than 95 mm is considered over four years old in females (January 2009). It has predicted that the spawning period is from May to June (water temperature in the range $21.0{\sim}26.6^{\circ}C$). Sexually matured individuals appeared over the two years old. The number of eggs in the ovaries was 202~747 ($491{\pm}154.0$).

• Proceedings of the Plant Resources Society of Korea Conference
• /
• 2020.08a
• /
• pp.62-62
• /
• 2020

체리나무는 앵두나무아과(Drupaceae) 벚나무속(Prunus) 앵두나무아속에 속하며 유럽 중남부와 소아시아가 원산지이다. 특히 온대지역에 잘 적응하는 체리나무는 재배기간 중 비가 적은 건조한 기후에 적합하다. 최근 국내에서 체리 소비가 급격히 증가함에 따라 체리 수입량[6,454톤('11)→15,855톤('19)]이 꾸준히 증가하고 있는 추세이다. 또한 국내에서 체리나무 재배에 대한 관심이 높아지면서 농경지 및 산지에 식재되어 생산량[289톤('09)→656톤('14)] 및 재배면적[60ha('08)→144ha('14)]도 꾸준히 증가하고 있다. 그러나 체리나무의 산지재배관련 연구는 전무한 실정으로 고품질 체리의 안정적 생산이 가능한 재배기술 개발이 시급히 요구되고 있다. 따라서 본 연구는 산지재배 체리나무의 생육, 결실 및 과실품질에 대한 기초자료를 확보하기 위하여 실시하였다. 공시품종은 '라핀(Lapins)'으로 대목은 '기셀라 6(Gisela 6)'을 사용한 3년과 4년생 체리나무를 조사하였다. 체리나무의 생육특성 조사 결과, 수고 및 근원경은 3년생 체리나무 234.0±23.0 cm, 5.1±0.7 cm로 나타났고 4년생 체리나무는 346.0±27.0 cm, 7.3±0.9 cm으로 조사되었다. 본당 착과수는 3년생 체리나무의 경우 과실이 착과되지 않았고 4년생 체리나무는 563.6±42.9개로 조사되었다. 4년생 체리나무의 과실특성을 조사한 결과, 입중 8.1±0.9 g, 당도 16.3 °Brix, 경도 9.8 N, 산도 1.3%로 조사되었으며, 본당 수확량은 4.6±0.3 kg으로 예측할 수 있었다.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.57 no.2
• /
• pp.106-112
• /
• 2012

In order to understand the growth and ecophy -siological response of ginseng to global warming condition, we cultivated one and two year ginseng seedlings in control (ambient $CO_2$ + ambient temperature) and global warming treatment (elevated $CO_2$ + elevated temperature) from March 2010 to July 2011. Shoot appearance and initiation of flowering were advanced by 3-4 days in global warming treatment than in control. However, timing of fruit setting and seed ripeness was similar in both control and global warming treatment. Shoot length was longer in global warming treatment than in control, and also the number of leaves was much in global warming treatment. Fresh root weight was not different between control and global warming treatment. Photosynthetic rate was higher in global warming treatment than at control. Photosynthetic rate and transpiration rate were higher in two year seedlings than in one year seedlings at control, but was not different between seedling age of ginseng in global warming treatment. Water use efficiency was higher in one year seedlings than two year seedlings at control and global warming treatment. These results demonstrated that Korean ginseng more or less positively responds to global warming situation.