• 한국작물학회지
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• 제43권4호
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• pp.264-268
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• 1998

The experiment was conducted to clarify irrigation requirement and percolation rate in rice paddy. The four rice cultural system of no-tin, till, transplanting, and direct seeding condition were treated in the lysimeter filled with sandy loam soil. The amounts of irrigation and soil percolation were measured daily, and irrigation requirement was estimated. The daily percolation was 19.5 l/$\textrm{m}^2$ in no-till direct seeding on flooded paddy surface, 17.4 l/$\textrm{m}^2$ in both of till-direct seeding on flooded surface and no-till transplanting, and 15.2 l/$\textrm{m}^2$ in transplanting plot. This is equivalent to 19.5, 17.4, and 15.2 mm per day, respectively. Highest irrigation requirement was 3,770 l/$\textrm{m}^2$ in no-till direct seeding plots. Others were 3,249, 2,577, and 2,321 l/$\textrm{m}^2$ in till-direct seeding, no-till transplanting and transplanting plot, respectively. The estimated irrigation requirement of no-till transplanting, till-direct seeding and no-till direct seeding was increased by 11, 37, and 59% compared to till-transplanting plot. Percolation rate of no-till transplanting, till direct seeding and no-till direct seeding was increased by 12%, 40%, and 66%, respectively compared to the till-transplanting plot. The percolation rate in paddy soil was increased greatly after reproductive stage of rice.

• 한국작물학회지
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• 제59권1호
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• pp.83-88
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• 2014

제주피의 발아특성 및 파종 심도에 따른 초기 생육 특성을 조사한 결과를 요약하면 다음과 같다. 가. 사료피 1호 종자는 $15^{\circ}C$ 이상에서 발아가 가능하였으며, $10-25^{\circ}C$의 범위에서 $20^{\circ}C$에서 가장 높은 발아율을 보였다. 나. 입모율은 담수와 직파에서 모두 $20^{\circ}C$에서 가장 높았으며, 담수직파에서 평균 입모율은 5.9%, 건답직파는 70.5%로 나타났다. 다. 사료피 1호의 출아가 가능한 종자의 최대 파종 깊이는 담수직파에서 15, 20, $25^{\circ}C$에서 0.5, 1.8, 1.5 cm, 건답직파는 각각의 온도에서 9.5, 10.0, 9.9 cm로 파종조건과 온도에 따라 변이를 보였다. 라. 사료피 1호는 담수와 건답직파 모두에서 온도와 관계없이 파종심도와 중배축장이 정의상관관계를 보여, 출아에 중배축 신장이 가장 크게 영향을 미치고 있을을 알 수 있다.

• Plant Resources
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• 제4권2호
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• pp.92-96
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• 2001

seeding rates(1.5,2.0,3.0 and 3.5$\ell$/10a). There were no differences in the yield components such as length of stem and ear diameter of stem number of branch, internode and ear, and yield of fresh and dry stem between the seeding methods with drilling and broadcasting, but yield components such as length of stem and ear, diameter of stem, number of branch, internode and ear, and yield of fresh and dry stem increased with seeding rates of from 2.5$\ell$ /10a to 3.5$\ell$/10a. Therefore potimum rates and methods of sowing were from 2.5$\ell$/10a to 3.5$\ell$/10a with seeding at the drilling and broadcasting.

• 한국작물학회지
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• 제39권5호
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• pp.495-501
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• 1994

배수불량답이 많이 분포하여 건답직파재배가 어려운 호남평야지에 알맞는 무논골뿌림재배의 적정 파종방법 및 파종후 담수시기를 밝히고자 만금벼를 공시하고 파종방법과 파종후 담수시기를 달리하여 1992년에 미사질양토인 전북통에서 수행한 시험결과를 요약하면 다음과 같다. 1. 입모율은 이앙기부착기와 관리기부착기간에는 별 차이가 없었으나 살립기에 의한 토중직파에서는 매우 낮았다. 2. 파종 소요시간은 살립기<관리기부착기<이앙기부착기 순으로 적었으며 육묘 및 이앙작업이 성약되어 어린모기계이앙보다 노력절감 효과가 컸다. 3. 도복은 세 파종방법 모두 어린모기계이앙보다 약간 심하였고 수량은 동력살립기에 의한 파종을 제외하고는 어린모기계이앙과 비슷하였다. 4. 파종직후 담수하는 것이 출아기가 빠르고 입모율이 높았으며 잡초발생양도 적었다. 5. 파종직후 담수하는 것이 수수 및 $m^2$당 입수가 많아 다소 증수하는 경향이었다.

• 한국조경학회지
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• 제27권2호
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• pp.51-57
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• 1999

Planting methods of seeding, seed net, sprig net and sprigging were evaluated for influence on the covering rate and the growth of Phragmites spp. The results were as follows. 1. Covering rate was high within 4 months when propagated by sprig net, seeding and sprigging but became same within 5 months afterwards regardless of Planting methods. 2. Growth of leaf height and width was high on vegetative types of Planting methods such as sprig net and sprigging when compared with on seed types of Planting methods such as seeding and seed net. 3. Sprig net showed good covering rate and growth than sprigging when compared within vegetative types of planting. 4. In this study, sprig net was figured out as the best type of Planting methods than any other types of Planting methods for the restoration of a shore vegetation in a urban stream.

• 한국환경복원기술학회지
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• 제1권1호
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• pp.141-150
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• 1998

This study was conducted to find out the possibility of seeding of Zoysia japonica and woody plants for the revegetation of rock-exposed-cutslopes by Natural Topsoil Restoration Methods (NTRM). The 5cm thick layer of artificial soil was attached at rock-exposed cutslopes for the growth of Zoysia japonica and native woody plants by NTRM. The main results were summarized as follows. 1. Artificial soil attached at rock-exposed-slopes by NTRM was not eroded until recovered by Zoysia japonica and native woody plants. It shows extremely low soil erodibility. 2. One year later after seeding, woody plants show 100% ground coverage. But, in early stage, they grew more quickly at northwest slopes than at southeast slopes. 3. In seeding of Zoysia japonica, it grew more quickly at southeast slopes than at northwest slopes. Also, it grew better at lower part of the slopes than at middle part of the slopes. 4. After one year from seeding, the height of Lespedeza cyrtobotrya and Indigo/era pseudo-tinctoria were longer than any other plants. The next were Albizzia julibrissin, Lespedeza cuneata and wild flowers. The tree height of Rhus chinensis shows 28cm length, so it has enough possibility to be used for roadside revegetation works. 5. Lespedeza cyrtobotrya and Indigo/era pseudo-tinctoria show different importance values according to slope aspect. But, they show tendency to outweigh the other plants at all slope-aspects. 6. Most of the plants seeded by NTRM were germinated well and they covered rock-exposed-slopes so quickly and effectively. Thus it leads to conclusion that the revegetation methods used in this experiment was a very effective methods to recover rock-exposed-slopes by seeding of zoysia japonica and native woody plants.

• 한국가축번식학회지
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• 제12권2호
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• pp.84-90
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• 1988

This study was done with mouse embryos to determine effects of the freezing media with or without 10% sucrose, and seeding methods (pincette, no seeding, liquid nitrogen gas phase and copper wire coiled straw) on embryo survival were determined using the FDA test. The summarized results are the following. 1. The FDA score found with copper wire coiled straw, no seeding, pincette and liquid nitrogen gas phase was 3.6, 3.6, 3.3 and 3.0, respectively. There were no significant differences. 2. The embryo score shows higher (P<0.05) survival rate using a freezing medium with sucrose than the one without it. Among the seeding procedure, better resutls are copper wire coiled straw and no seeded. 3. The results suggest that copper wire coiled seeding no seeding be as good as seeding when the mouse embryos were frozen in a liquid nitrogen container using both the freezing and dilution media containing 10% sucrose.

• 한국산림과학회지
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• 제31권1호
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• pp.37-42
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• 1976

본시험(本試驗)은 천보산지역(天寶山地域)의 황폐지(荒廢地)에서 효과적(效果的)인 지피식생(地被植生) 조성방법(造成方法) 구명(究明)코자 실시(實施)되었다. 이 지역(地域)은 심한 면상침식(面狀浸蝕)이 일어난 곳으로서 모재(母材)는 화강편마암(花崗片麻岩)으로 매우 침식위험(浸蝕危險)이 높다. 참싸리, 새, 아까시나무가 공시초목(供試草木)으로 사용 되었고 삽종방법(揷種方法)은 산파(散播)거적피복(被覆)과 산폐무피복(散廢無被覆), 조파(條播) 10cm와 조파(條播) 20cm, 점파(點播) 20cm와 점파(點播) 30cm 이상(以上) 3파종(播種) 6처리(處理)였다. 1. $30^{\circ}$이하(以下)의 경사지(傾斜地)에서는 산파(散播)거적피복방법(被覆方法)이 가장 효과적(效果的)이었다. 2. $30^{\circ}$이상(以上)의 급경사지(急傾斜地)에서는 조파(條播) 10cm가 효과적(效果的)이었다. 3. 토성(土性)은 토양수분(土壤水分)을 조절(調節)하여 식생조성(植生造成)에 영향을 준 것 같다. 피복도(被覆度)와 생중량(生重量)은 토양중(土壤中)의 세토량(細土量)과 함께 증가(增加)하였다. 4. 해가 지남에 따라 피복도(被覆度)는 생중량(生重量)과 함께 증가(增加)하였으나 생립본수(生立本數)는 감소(減少)하였다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.319-319
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• 2017

Methane is the main greenhouse gas released from rice paddy field. Methane from paddy fields accounts for 11 % of the global total methane emission. The global warming potential (GWP) of methane is 25 times more than that of carbon dioxide on a mass basis. It is well known that most effective practice to mitigate methane in paddy is related to the water management during rice growing season and the use of organic matters. This study was conducted to investigate the effects of tillage and cultivation method on methane emission in paddy. Tillage (tillage and no-tillage) and cultivation methods (transplanting and direct seeding) were combined tillage-transplanting (T-T), tillage-wet hill seeding (T-W), tillage-dry seeding (T-D) and no-till dry seeding (NT-D) to evaluate methane mitigation efficiency. Daily methane emission was decreased on seeding treatments (T-W, T-D, NT-D) than transplanting treatment (T-T). Amount of methane emission during rice growing season is highest in T-T ($411.7CH_4\;kg\;ha^{-1}y^{-1}$) and lowest in NT-D treatment (89.7). In T-W and T-D treatments, methane emissions were significantly decreased by 36 and 51 % respectively compared with T-T. Methane emissions were highly correlated with the dry weight of whole rice plant ($R^2=0.62{\sim}0.93$). T-T treatment showed highest $R^2$ (0.93) among the four treatments. Rice grain yields did not significantly differ with the tillage and cultivation methods used. These results suggest that direct seeding practice in rice production could mitigate the methane emissions without loss in grain yield.

• Journal of Microbiology and Biotechnology
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• 제14권4호
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• pp.707-714
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• 2004

How to improve the cell culture method on scaffolds is important in the tissue engineering fileld. In this study, we optimized seeding and culture methods to vascular smooth muscle cells (VSMCs) on biodegradable polymer scaffold. The primary culture of VSMCs obtained from canine external jugular vein was accomplished by applying the explant-derived method. The primary cultured VSMCs were seeded into scaffolds and then cultured by using various different methods; static or dynamic seeding, static or dynamic culture. The difference in proliferative response of VSMCs was analyzed with an alamar blue assay. Cell-polymer construct was examined by histochemical method and scanning electron microscopy. Mesh type scaffold ($10 \times 10 \times0.4 mm$) was made of polyglycolic acid (PGA) suture thread. The PGA mesh type scaffold was 45% in porosity, and 0.03 g in weight. The primary cultured VSMCs were confirmed with immunohistochemical staining using monoclonal anti-$\alpha$-smooth muscle actin. The density and distribution of proliferated VSMCs within the scaffold and cellular adherence on the surface of the scaffold showed better results in the static seeding condition than in the dynamic condition. Under the same condition of seeding method as the static condition, the dynamic culture condition showed enhanced proliferation rates of the VSMCs when compared to the static culture condition. In conclusion, to improve the VSMCs proliferation in vitro, static seeding is better than the dynamic condition. In the culture condition, however, culture under the dynamic status is better than the static condition. This was a pilot study to manufacture artificial vascular vessel by tissue engineering.