• Asian-Australasian Journal of Animal Sciences
• /
• 제14권7호
• /
• pp.935-940
• /
• 2001

To determine the effect of different growth stages and cultivars on the chemical composition of sorghum plant and its morphological fractions, samples of whole plant, leaf and stem of J.S-263, J.S-88 and Hegari cultivars, harvested at various growth stages were drawn for analysis. All the samples were analysed for their dry matter contents and various cell wall components such as NDF, ADF. hemicellulose, cellulose, lignin, cutin and silica. Significant increase in DM contents of whole sorghum plant, leaf and stem was observed with advancing stage of growth. The highest DM content was recorded in leaf fraction of the plant. All the cell wall constituents increased significantly in whole sorghum plant, leaf and stem as the plant matured. The maximum NDF, ADF, cellulose and lignin contents were observed in stem fraction, followed by whole plant. However, the hemicellulose, cutin and silica contents were higher in leaf fraction of the plant. The cultivars were found to have some effect on the chemical composition of whole plant, leaf and stem fractions. The results indicated that plant maturity had a much greater effect on the chemical composition of sorghum plant, whereas it was little affected by cultivars.

• 한국토양비료학회지
• /
• 제50권6호
• /
• pp.547-553
• /
• 2017

Treatment of food waste is becoming a big issue due to their significant quantities. Composting could be an effective alternative for food waste management which could be used as soil conditioner or fertilizer with little concerns about heavy metals and pathogens. The purpose of this research was to evaluate the effect of food waste on Chinese cabbage growth and soil properties. 9 different treatments (two livestock manures, two food wastes, two livestock manures + chemical fertilizer, two food wastes + chemical fertilizer, and control) were applied to Chinese cabbage. All treatments were carried out in 3 replicates. We measured leaf length, leaf width, fresh weight, dry weight, and leaf greenness of Chinese cabbage. Treatment of one of food waste composts significantly increased leaf length and leaf width of Chinese cabbage by 28.6, 26.6, 67.7, and 59.9%, respectively, in comparison to those of control, while no significant differences for leaf greenness were shown. Application of food waste compost resulted in significant increase of EC, available $P_2O_5$, CEC, organic matter, and exchangeable cations. However, further researches are needed to reduce NaCl content of food waste.

• 한국초지조사료학회지
• /
• 제11권4호
• /
• pp.199-202
• /
• 1991

Red clover, ladino clover, white clover, alfalfa, 차풀 그리고 갈키나물등 6종의 콩과식물에서 잎과 줄기의 Esterase Isozyme를 추출하여 starch gel 전기영동법으로 분리한 후 염색하여 종간 차이점을 고찰하였다. 공시된 식물의 Esterase Isozyme의 band수, 염색강도, 이동속도는 종간에 차이가 있었다. 그러나 동일종에 있어서는 alfalfa를 제외하고는 잎과 줄기사이에 band의 수는 차이가 없었으며 차풀과 갈키나물에서는 전혀 나타나지 않았다.(Fig. 2). Esterase Isozyme의 염색강도와 이동속도는 Est 1 이 가장 강하고 빨랐다.

• 한국식물병리학회지
• /
• 제3권4호
• /
• pp.285-290
• /
• 1987

대두 갈색무늬병의 진전은 한 식물체에서 상위엽으로의 진전속도(수직감염율 : vertical progress)과 밀접한 관계가 있다. 실제로 포장에서의 갈색무늬병 진전은 주로 하위엽에서 발병하기 시작하여 상위엽에 비하여 이병정도가 높은 것이 보통이다. 이러한 현상의 원인을 구명하기 위하여 수행한 본 실험에서 갈색무늬병의 감염율은 잎의 성숙도와 정의 상관을 보였으며 이러한 유엽저항성은 접종원의 분포와는 무관한 것으로 보였다. 또 상위엽의 엽표면일출액 (leaf diffusate)은 병원균 포자발아 및 관계신장의 억제 정도가 하위엽의 일출액에 비하여 높았으며 이러한 경향은 저항성품종에서 더욱 현저하여 엽일출액의 어떤 발아억제물질이 갈색무늬병의 유엽저항성에 관여하는 것으로 추정되었다.

• 농약과학회지
• /
• 제3권1호
• /
• pp.46-50
• /
• 1999

민들레를 비롯하여 약용식물 9종 메탄올 추출물의 빨간 집모기, 집파리 유충 및 성충에 대한 살충력 실험을 실시하였다. 그 결과 빨간집모기(Culex pipiens pallens) 유충에 대하여는 솔(Pinus densiflora)잎, 고삼(Sophora angestifolia) 뿌리 등이 효과가 좋았다. 파리유충에 대한 살충효과는 민들레(Taraxacum platycarpum)잎 및 부추전초의 메탄올 추출물이 아주 높았으며, 백부근(Stemonae sessilifolia) 뿌리도 효과가 있는 것으로 밝혀졌으나 집파리(Musca domestica) 성충에 대한 살충효과는 크지 않았다.

• 한국연초학회지
• /
• 제24권2호
• /
• pp.88-93
• /
• 2002

This study was carried out to investigate the changes of chromatic, chemical and organoleptic characteristics of green leaf tobaccos during storage in warehouse. Eight grades(flue-cured ; A2O, B2O, C2L and D2L, burley ; A2T, B2T, C2W and D2W) of green loaves produced in 2001 were stored during 8 months(Oct. 30, 2001 to Jun. 30, 2002) in warehouse of Kimcheon(flue-cured) and Namwon(burley) Leaf Tobacco Processing factory, respectively. Moisture contents of D2L in flue-cured and four grades in burley were significantly decreased during storage in warehouse. Redness(a) values of six grades except for D2L and D2W were significantly increased during storage. Lightness(L), yellow(b) and pH values, and the contents of nicotine, total nitrogen and total sugar were not changed during storage. Irritations of flue-cured tobacco were increased, whereas tastes were decreased during storage. Irritations and tastes of burley tobacco were little changed during storage. The result suggests that the flue-cured green leaf being processed as early as possible for minimizing the deterioration of smoke taste during storage in warehouse.

• Journal of Plant Biology
• /
• 제16권1_2호
• /
• pp.1-5
• /
• 1973

Six young trees of Alnus tinctoria grown in isolation, each having different growing stage, were selected and the surface area of their roots, stems and leaves was determined. Each of the roots of more than 0.2mm in diameter and stems was cut at intervals of 10cm and their surface area was calculated with 2$\pi$rl from the average diameter (2r) of both sections (upper and lower) by making cylindrical estimation of the cut pieces. The leaf area measured was only one side area, and the volume of cut piece and amount of dry matter of each organ were also measured. The percentage to the surface area of the whole plant body by each organ was 4-12% in root, 7-9% in stem and 69-89% in leaf, respectively. There was relatively a little individual difference. However, the surface area ratios of root and stem showed a slightly increasing tendency while that of leaf decreasing according to the growing stage. The ratio of sum leaf area index (LAIi) was 2.3-4.0$m^2$/$m^2$-and that of the surface area index(SaIi) was 0.16-0.33$m^2$/$m^2$, respectively. It has been known that the stem surface area(SAI) to the leaf area index(LAI) is within the range of 31-53%, but the SAIi is within the range of 8-11% of the LAIi.

• Plant Resources
• /
• 제8권3호
• /
• pp.244-249
• /
• 2005

The growth charateristics and karyotypes of Aster spathulifolius collected from 5 sites including coastal and island region on the Korean peninsula, were analysed. Several morphological characteristics of the plants such as leaf length, leaf width, top internode, medium internode, spike branching, flower diameter, number of petal, leaf color, leaf form, stem and leaf hair, viscosity, and serration of the plants were distinctly different depending on the native region from which they were collected. Karyotypic analysis showed that the chromosome number was all diploid (2n=18), with one pair of submetacentric satellite chromosomes. The chromosome composition included 7 pairs of metacentric chromosomes and 2 pairs of submetacentric chromosomes in all plants. However, chromosome order and the ranges of the chromosome lengths were a little different from plant to plant according to their native growing regions. The plants from Geoje-Do especially showed large differences in the chromosome lengths between the longest and the shortest compared to the plants from other places. This results provide important data to support the classification of the species into several sub-species.

• Journal of Plant Biology
• /
• 제12권1호
• /
• pp.15-21
• /
• 1969

In this experiment, the litters of each five species of neadle-leaf trees and broad-leaf trees were laid on each pot soils, which had same soil conditions, is the green house and the sil fertility of each pots were determined after four years. Chemical properties among each pot soils under litters of needle-laef trees showed remarkable different values in the pH, base exchange capacity, total exchangeable base, base saturation, organic matter, available phosphorus, exchangeable potassium and calcium, and that of broad-leaf trees showed respectively significant difference. The content of chemical components, such as total exchangeable base, organic matter, total nitrogen, available phosphorus and exchanbeable potassium, between pot soils under litters of the needle-leaf trees and the broad-leaf trees were significant at the 0.01 and 0.05 levels of the statistical probability. The fertility of soil under the influence of decayed fallen leaves is the highest value in the posts of broad-leaves and next to the pots of needle-leaves and the control pots the lowest. The pH value of the soil with various kinds of fallen leaves showed little difference among themselves, but it especially approached in the broad leaves plots gradually to neutral and hte non-treated plot showed acidity. Lespedeza bicolar and Castanea crenata are supposed to contribute to the fertility of soil. Pinus rigida showed excellent exchanged properties of soi. The leaves of Robinia pseudoacacia and Pinus koraiensis did not contribute much to the promotion of fertility of soil.

• 한국초지조사료학회지
• /
• 제15권1호
• /
• pp.61-66
• /
• 1995

연맥의 수확시 생육시기가 건물수량 및 사료적인 가치에 미치는 영향을 알기 위하여 1993년 3월 13일에 계명전문대학 부속목장에서 파종하여 지엽출현전, 지엽출현기, 출수기, 유숙기 및 호숙기에 수확하였다. 1. 사초의 건물함량은 지엽출현전, 지엽출현기, 출수기, 유숙기 및 호숙기에 각각 11.8, 12.3, 14.9, 25.6 및 28.8%로 지엽출현전부터 cnftnrlRK지는 낮았으나 출수기부터 호숙기까지는 급격히 증가되었다. 2. 잎의 비율은 지엽출현전의 58%에서 호숙기에는 11%로 생육이 진행된에 EK라 감소 되었고 이ㅗ영과 내영을 포함란 곡실의 비율은 출수기 7%에서 호숙기에는 43%로 증가 되었다. 3. 조단백질의 함량은 생육이 진행된에 EK라 감소(P<.05)되었고 그 범위는 24.9%에서 10.7%였다. 4. NDF의 함량은 생육이 진행된에 따라 출수기를 정점으로 증가(P<.05)되다가 유숙기에는 감소(P<.05)되었고 그 이후부터는 변화가 없었다. ADF의 함량은 출수기를 정점으로 증가(P<.05)되다가 유숙기부터는 감소(P<.05)되었다. 5, 건물수량은 지엽출현전, 지엽출현기, 출수기, 유숙기 및 호숙기에 각각 2,420, 4,380, 7,190, 13,130 및 14,530kg로 생육시기가 진행된에 EK라 증가(P<.05)되었다. 6. 본 시험의 결과에 의하면 봄 연맥의 사일리지 제조를 위하여 일시에 수확한다면 유숙기가 알맞다고 생각된다.