• 농업과학연구
• /
• 제11권1호
• /
• pp.77-84
• /
• 1984

국내(國內)에서 많이 소비(消費)되는 킹건고추와 일본(日本) 재래종(在來種)인 십방(十房)을 공시(供試)하여 고추의 생육(生育)에 중요(重要)한 온도(溫度)와 시비량(施肥量)을 달리하여 처리(處理)함으로써 고추의 생장(生長)과 광합성(光合成)에 미치는 영향(影響)을 조사(調査)하여 고추재배법(栽培法) 개선(改善)에 필요한 기초자료(基礎資料)를 얻고자 수행(遂行)된 본(本) 시험(試驗)의 결과(結果)는 다음과 같다. 1. 킹건 고추는 십방(十房)에 비하여 초장(草長), 간장(稈長), 화아수(花芽數), 건물중(乾物重), 동화량(同化量)이 많았고 십방(十房)은 킹건고추보다 엽수(葉數), 절수(節數), 엽면적(葉面積)이 많은 경향(傾向)이었다. 2. 시비량간(施肥量間)에는 증비구(增肥區)가 보비구(普肥區)보다 초장(草長), 엽수(葉數), 절수(節數), 화아수(花芽數), 건물중(乾物重), 엽면적(葉面積), 광합성(光合成)이 현저히 증가(增加)되었다. 3. 온도간(溫度間)에는 고야온(高夜溫) ($25^{\circ}C$) 처리시(處理時) 초장(草長), 간장(稈長), 엽수(葉數), 절수(節數), 화아수(花芽數), 분기수(分技數), 건물중(乾物重), 엽면적(葉面積)이 현저하게 많은 경향(傾向)을 보였다. 4. 상대생장율(相對生長率), 엽면적율(葉面積率)은 증비구(增肥區)와 고야온(高夜溫) 처리시(處理時) 높아졌으나 순동화율(純同化率)은 엽수(葉數)가 많은 십방(十房)이 킹건고추보다 적었으며 고야온(高夜溫) 처리시(處理時) 오히려 감소(減少)하였다. 5. 광합성(光合成)은 킹건고추에서 증비(增肥) 광도(光度)가 높아질수록 현저하게 증가(增加)되었다. 6. 고추 수량(收量)을 좌우하는 화아수(花芽數)는 킹건고추에서 증비(增肥), 고야간온도(高夜間溫度)($25^{\circ}C$)조건(條件)에서 많았다.

• 한국환경보건학회지
• /
• 제40권3호
• /
• pp.234-244
• /
• 2014

Objectives: This study was carried out in order to analyze the composition of the leaves and stems of Abeliophyllum distichum Nakai, with the aim of obtaining basic data for utilizing the plant as a food ingredient, as well as for processing. Methods: Leaves and stems from Abeliophyllum distichum Nakai were harvested at Cheongcheon-myeon, Geosan-gun, Chungcheongbuk-do, and were subsequently freeze-dried and ground to a fine powder for chemical component analysis and safety evaluation. Results: The moisture contents of Abeliophyllum distichum Nakai leaves and stems were respectively 65.07% and 40.97%, and the crude ash contents were 1.32% and 0.91%. In addition, the crude protein contents were 11.97% and 3.77%, and the crude fat contents were 2.52% and 0.36%, respectively. The fructose and glucose contents were 32.13 mg/g and 56.17 mg/g for leaves, and 11.38 mg/g and 10.59 mg/g for stems. The major fatty acids of the leaves were palmitic acid (31.79%) and stearic acid (14.79%), and those for stems were linolenic acid (32.78%) and palmitic acid (26.75%). The ascorbic acid contents of leaves and stems were 1.32 mg/g and 0.30 mg/g respectively. The calcium content was found to be the highest among the minerals tested, both in the leaves and stems, with the levels being 166.17 mg/100 g for leaves and 592.34 mg/100 g for stems. The content of organic acid was greater in leaves than in stems, with that of malic acid accounting for more than 75% of total organic acids for both samples. The total phenolic compounds and flavonoid contents of Abeliophyllum distichum Nakai were 50.64 mg/g and 13.53 mg/g in leaves and 96.47 mg/g and 18.53 mg/g in stems, respectively. No changes were shown in the number of micronucleated polychromatic erythrocytes (MNPCE) among 2,000 polychromatic erythrocytes compared to the negative control. Abeliophyllum distichum Nakai was administered orally to rats in order to investigate acute toxicity. The $LD_{50}$ values in rats were above 2,000 mg/kg. Conclusion: These results indicate that the leaves and stems of Abeliophyllum distichum Nakai can be used as natural ingredients in the development of nutritional and functional materials.

• Journal of Ecology and Environment
• /
• 제41권9호
• /
• pp.256-264
• /
• 2017

Background: The aim of this study was to clarify the relationship between the sexual reproduction and the resource allocation in a natural Polygonatum humile population grown in a temperate mixed forest gap. For this aim, the plant size, the node which flower was formed, the fruiting rate, and the dry weight of each organ were monitored from June 2014 to August 2015. Results: Firstly, in 3-13-leaf plants, plants with leaves ${\leq}8$ did not have flowers and in plants with over 9 leaves the flowering rate increased with the number of leaves. Among plants with the same number of leaves, the total leaf area and dry weight of flowering plants were larger than those of non-flowering plants. The minimum leaf area and dry weight of flowering plants were $100cm^2$ and 200 mg, respectively. Secondary, the flowers were formed at the 3rd~8th nodes, and the flowering rate was highest at the 5th node. Thirdly, cumulative values of leaf properties from the last leaf (the top leaf on a stem) to the same leaf rank were greater in a plant with a reproductive organ than in a plant without a reproductive organ. Fourthly, fruit set was 6.1% and faithful fruit was 2.6% of total flowers. Biomasses of new rhizomes produced per milligram dry weight of leaf were $0.397{\pm}190mg$ in plants that set fruit and $0.520{\pm}0.263mg$ in plants that did not, and the difference between the 2 plant groups was significant at the 0.1% level. Conclusions: P. humile showed that the 1st flower formed on the 3rd node from the shoot's base. And P. humile showed the minimum plant size needed in fruiting, and fruiting restricted the growth of new rhizomes. However, the fruiting rate was very low. Thus, it was thought that the low fruiting rate caused more energy to invest in the rhizomes, leading to a longer rhizome. A longer rhizome was thought to be more advantageous than a short one to avoid the shading.

• The Korean Journal of Ecology
• /
• 제12권3호
• /
• pp.161-170
• /
• 1989

To verify allelopathic effects of Artemisia princeps var. orientalis, a number of laboratory experiments have been performed. Aqueous extracts of leaves, stems and roots of the above species inhibited the seed germination and seedling growth of experimental species, receptor plants. In general, the higher was the concentration of the extracts, the lower was the germination and the growth ratio. Volatile substances released from leaves of the donor plants also inhibited the seed germination and the radicle elongation of receptor plants. Therefore, to find out the inhibitory substances emitted from the wormwood, gas chromatography was employed. As a result of the analysis, 17 KDICical substances were isolated from the leaves and most of them were identified as phenolic compounds.

• 한국연초학회지
• /
• 제16권2호
• /
• pp.108-112
• /
• 1994

Response of two ploidy levels to cool temperature and short day treatment were investigated under controlled conditione of Phytotron. The haploid and diploid of seven genotypes were started and grown to the 8- leaf stage in the greenhouse. They were treated during 15 and 20 days to 8- hour photoperiods at 18$^{\circ}C$ in controlled - environmental room to induce premature flowering, respectively. Diploid plants of seven genotypes flower later than their haploid plants at 20 days treatment. But under 15 days treatment, diploid plants of NC82, Hicks, BY4, NC2326 and Coker86 were not different from their haploid plants for days to flower. Diploid plants of seven genotypes developed the same number of leaves as their haploid plants at 20 days treatment. Under 15 days treatment, diploid plants of Coker347 and NC95 developed more leaves per plant than their haploid plants. Correlation coefficient between the ranks of leaves per plant of seven genotypes at two ploidy levels was 0.964 and 0.929 at 15 and 20 days treatment, respectively.

• The Korean Journal of Ecology
• /
• 제8권1호
• /
• pp.15-19
• /
• 1985

A number of field surveys have been performed in larch (Larix leptolepsis) forest floor in which any seeding of this species never find ther. In laboratory work, aqueous extracts from leaves, roots and stems of larch were provided and used to bioassay. Among them, germination and seedling growth of selected species were the most inhibitory in leaves extracts. Though germiation percentage of a species showed high compared with control, its dry weight after a given period grown were clearly low. The results due to be considered by allelopathic effect. And syringic acid and p-hydroxybenzoic acid were identified by HPLC from larch leaves. It is assumed that these phenolic acids affect on other species as allelochemicals of larch.

• 한국식품저장유통학회지
• /
• 제7권1호
• /
• pp.99-102
• /
• 2000

Comparing and analysing the productivity and the main ingredients of persimmon leaves by cultivars were conducted to improve the quality and productivity of the per-simmon leaf tea. As a result of the survey, Dungsi was decidedly good in growth co-ndition of survival rate, stem diameter and the number of shoots etc. Also , DUngsi had the highest leaf productivity of 567 leaves and the leaf weight of 1.98 kg per one plant after three years of planting . On accounts of productivity, ingredient analysis and panel test etc. we collectively through that Dungsi was the best cutltivar for the persimmon leaf tea.

• Advances in Traditional Medicine
• /
• 제8권2호
• /
• pp.187-191
• /
• 2008

Trema orientalis Linn. is commonly grown in many parts of Bangladesh. Its leaves have been used for analgesic and anti-diarrhoeal activity in traditional medicine. This study evaluates the potential analgesic and anti-diarrhoeal activity of methanol and aqueous extracts of leaves in experimental acetic acid induced writhing and castor oil induced diarrhoea in mice. The aqueous extract of leaves showed significant (P < 0.001) analgesic effect in acetic acid induced writhing in mice at a dose of 500 mg/kg body weight In castor oil induced antidiarrhoeal screening both extract increased latent period (P < 0.025) and decrease the number of stool (P < 0.025) at the dose of 500 mg/kg body weight comparable with that of the standard drug loperamide. The results provide a support for the use of this plant in traditional medicine and suggest its further investigation.

• 한국연초학회지
• /
• 제23권1호
• /
• pp.12-18
• /
• 2001

This study was conducted to investigate the effect of tobacco curing on far infrared light on the quality of flue-cured tobacco leaves. Physicochemical characteristics such as alkaloid, total sugar, total nitrogen, starch, total phenolic compounds, browning degrees, and color differences, in cured tobacco leaves were compared between hot air and far infrared curing methods. There was no significant difference in sugar/nicotine ratio and nitrogen number between the curing methods, while the contents of ether extract and filling capacity were increase by far infrared curing. Therefore, it was expected that far infrared curing might be effective for high aroma and physical properties of the cured tobacco leaves.

• 원예과학기술지
• /
• 제35권3호
• /
• pp.289-299
• /
• 2017

The objective of this study was to determine the effect of replacing perlite (PL) with pellets processed with poultry feather fiber as an inert material to prepare growing medium. The growth and flowering of Salvia splendens 'Vista Red' grown in individual growing medium $Biosangto^{(R)}$, peat moss (PM), PL, and two pellets (P45-1 and P45-2) were evaluated. Peat moss was mixed with PL, P45-1, or P45-2 at various ratios (1:0 to 1:3 or 3:1 by volume) to investigate the feasibility of replacing PL with pellets. Nutrient composition of the growing medium and leaf tissues was analyzed. The number of florets, inflorescence length, plant height, and fresh weight of plants grown in media containing P45-1 or P45-2 were reduced compared to those grown in individual growing medium PM or PL. As the mixing ratio of P45-1 or P45-2 to PM was higher, the growth of salvia, such as inflorescence length, plant height, number of leaves, and fresh weight was inhibited. Our results indicate that mixing three parts PM with one part of P45-1 (PM/P45-1/3:1) or P45-2 (PM/P45-2/3:1) accelerated flowering and increased the number of florets and leaves compared to other mixing ratios of PM and pellets media. The concentrations of phosphorus (P), calcium (Ca), boron (B), iron (Fe), and copper (Cu) in individual growing medium PL, P45-1, and P45-2 were significantly lower than those in PM. The concentration of N was the highest in leaves of plants grown in P45-1 or P45-2 amended media, and the concentrations of P, Ca, and zinc (Zn) in leaves were lower in individual growing medium P45-1 or P45-2 than in PM and PL. The pH of PM/P45-1/3:1 or PM/P45-2/3:1 media was maintained at optimal level (5.8-5.9) and the concentrations of macro- and micro-elements in the media and leaves were considered to be optimal levels. Therefore, mixing three parts PM with one part P45-1(PM:P45-1/3:1) or P45-2 (PM:P45-2/3:1) is recommended for improved growth and flowering in salvia. This suggests that P45-1 or P45-2 can replace PL as an inert material to prepare growing medium.