• 한국산림과학회지
• /
• 제46권1호
• /
• pp.1-9
• /
• 1980

본(本) 연구(硏究)는 산지이식(山地移植)에서 Jiffy pot를 fiber pot로 대체가능(對替可能)한가 알아보기 위해 수행(遂行)되었다. fiber pot는 fiber, wood waste particle, particle 량(量)의 10%에 해당하는 bark powder로 만들어졌고 또 latex가 결합제(結合劑)로 첨가(添加)되었다. pot는 식물(植物)이 자라는 동안 pot벽(壁)의 wood fiber 분해(分解)에서 생기는 배양토(培養土)의 N흠핍증(欠乏症)을 막기 위해 충분(充分)한 요소액(尿素液)으로 spray되었다. fiber pot의 이용가능성(利用可能性)은 온실조건(溫室條件)하에 두 수종(樹種)의 service test에서 Jiffy pot와 비교(比較)되었다. 결과(結果)는 다음과 같이 요약(要約)된다. 1. 비중(比重), 비인열도(比引裂度), 비파열도(比破裂度)에 있어서 30% wood fiber+10%의 bark powder를 포함(包含)한 70% particle과 3% latex로 된 fiber pot가 Jiffy pot에서와 같은 좋은 결과(結果)를 나타냈다. 흡수력(吸水力)에 있어서는 50% fiber+50% particle과 3%-latex로 된 fiber pot가 가장 좋은 결과(結果)를 나타냈다. 뿌리의 pot벽(壁) 관통(貫通), 취급편의성(取扱便宜性)에 대(對)한 상기(上記) 물리적(物理的), 기계적(機械的) 성질(性質)을 고려(考慮)할 때 30%fiber+70%particle과 3%-latex로 된 fiber pot가 좋을 것으로 보였다. 2. Jiffy pot와 마찬가지로 fiber pot에서도 묘목생장(苗木生長)에는 아무런 해(害)가 없었다. 뿌리의 pot벽(壁) 관통능력(貫通能力)은 Jiffy pot보다 fiber pot가 다소 뒤지나 운반(運搬)에 의(依)한 pot의 손상(損傷)은 Jiffy pot보다 약간 더 경미(輕微)했다.

• 수산해양기술연구
• /
• 제58권2호
• /
• pp.95-105
• /
• 2022

In this study, the fishery status of the octopus pot fishery in the east coastal sea were investigated, and the fishing performance of each pot shape was compared and analyzed. The fishery status survey was conducted through listening surveys at Jukbyeon Port, Uljin Port and Pohang Daebo Port in Gyeongbuk Province, and the amount of fishing gear used, fishing method, size and loss of octopus pot fishery was investigated. On the east coastal sea, octopus is one of the commercially important fish stocks and is caught in inshore pots, inshore combos, inshore gillnets and offshore pots. Among these fishing methods, pot fishing yields the highest catch. The shape of the pot differs depending on the region. In Uljin (Jukbyeon Port and Hupo Port), Gyeongbuk, rectangular type net pots are mainly used, and in Pohang (Daebo Port) in Gyeongbuk, drum-type pots are mostly used. Enteroctopus dofleini accounts for more than 90% of the catch of octopus. For the octopus fishing performance test by trap type, three types of traps (rectangular pot, drum pot and cylinder pot) were used on the coastal sea of Pohang Daebo. As a result, the total catch by pot shape was shown in the order of rectangular-type pot > drum-type pot > cylinder-type pot. The catch of octopus, the target species, was in the following order: rectangular-type pot > drum-type pot > cylinder-type pot. Such result shows a significant difference (Mann-Whitney test, p<0.05).

• 수산해양기술연구
• /
• 제55권3호
• /
• pp.190-197
• /
• 2019

This study investigated the luring effect of the sardine bait, which is used to catch octopus with pot, as the preliminary study for the development of alternative bait for octopus pot. The soaking time for bait was divided into "5 days or less" and "11 days or longer" The number of times octopus entered the pot with bait and the empty pot was investigated under dark adaptation and light adaptation processes and the distribution of tank section was investigated under light adaptation process. The case of "11 days or longer" sardine soaking time showed higher rate of distribution in the section of pot with bait compared to the case of "5 days or less" In the case of "5 days or less" soaking time, the number of times the octopus entered the pot with bait was similar to that it entered the pot without it even during dark adaptation and light adaptation. However, in the case of "11 days or longer", the octopus entered the pot with bait more quickly than the pot without bait and more frequently during dark adaptation hours. There were cases where the octopus did not enter any pot. In the case of "5 days or less", with less decomposition of baits, the octopus entered the empty pot more during light adaptation process, and it appeared that the pot was used as a hideout.

• 한국작물학회지
• /
• 제26권4호
• /
• pp.350-356
• /
• 1981

본 실험은 묘상용 Vinyl pot의 크기와 Vinyl pot당 육묘주수를 달리하여 향끽미종 잎담배인 소향으로 Vinyl pot당 육묘가능주수의 구명과 생육비절멸방안을 모색코자 실시한 결과를 요약하면 다음과 같다. 1. Vinyl pot가 클수록 이식묘의 주당 건물중, 변이계수 및 건물율은 증가하였으나 T/R율, 경쟁지수및 단위생산성은 감소하였다. 2. Pot당 육묘주수가 많을수록 변이계수, 경쟁지수 및 단위생산성은 증가하였으나 주당 건물중은 감소하였다. 3. 자상성약구와 가식구는 모두 4cm pot에서 3주, 5cm pot에서 5주까지 육묘가 가능하였고 자상성약육묘보다 가식육묘가 유리하였다. 4. 5cm pot당 5주씩 육묘하여 대조구(3.5cm pot에 1주 육묘)에 비하여 묘상면적 및 묘상자재를 60.9%, 이식노동력을 36.3% 절감되었다.

• 한국균학회지
• /
• 제30권1호
• /
• pp.18-22
• /
• 2002

느타리버섯 봉지 재배의 봉지직경 및 배지량에 따른 생육특성을 비교하여 효율적인 봉지규격을 추정하고자 미송톱밥, 비트펄프, 면실박을 부피비로 50 : 30 : 20으로 혼합한 배지로 봉지 직경 $10{\sim}20\;cm$, 배지량 $600{\sim}2,500\;g$/봉지 범위에서 시험 한 결과 봉지직경이 작을수록 배지량이 많아짐에 따라 배지길이가 길어져 배양일수가 지연되었고 이에 따라 총재배기간이 길었다. 또한 2주기까지의 수량은 같은 봉지직경에서 배지량이 클수록 증가하였고 배지량이 1,200 g/봉지보다 많으면 생물학적효율은 감소하여 100% 보다 낮았으며, 같은 배지량에서 봉지 직경에 따른 수량은 큰 차이 없으나 회수율은 봉지직경이 14 cm 보다 크면 감소하였다. 따라서 재배기간, 수량, 생물학적효율 등을 고려한 효율적인 봉지직경은 $10{\sim}14\;cm$, 배지량 $800{\sim}1,200\;g$/봉지 내외로 추정되었다.

• 한국연초학회지
• /
• 제19권1호
• /
• pp.18-23
• /
• 1997

The study was carried out to clarify reasonable production of healthy seedling, optimal Pot depth, and appropriate transplanting time, which can be deduced from understanding of seedling quality. Seedling quality results from growth of root and shoot, morphology and distribution of root system under influence of Pot depth during seedling growing period. Stem height, shoot dry weight, leaf area and leaf number were increased in proportion to depth of pots. Growth of shoot and root during seedling growing period showed the most dramatic development between 20th and 25th day after temporary planting. Root number increased as pot depth decrease and total root length and dry weight increased as pot depth increase. In 5cm pot, relative multiplication rate was higher and mean extension rate was lower than other depth of Pot. The limitation of pot volume in which rhizosphere was located enhance the development of roots of second and third order. At 20th days after temporary Planting root distribution was relatively uniform in length and development of adventitious root on stem base was poor as Pot depth decreased.

• 수산해양기술연구
• /
• 제56권3호
• /
• pp.202-212
• /
• 2020

In order to replace sardine baits for octopus pot, an efficacy experiment to lure with alternative bait (fermented skate or chicken skin in artificial crab or northern clam) pots and sardine pot were conducted in a circular water tank. The soaking time of the sardine bait was divided into two categories: six days or less and seven days or more. The behavioral response of octopus to the artificial bait pots and sardine pot were investigated. In the comparison of the luring effects between pots with fermented skate inside artificial crab or northern clam and sardine pot, the pot with artificial crab + fermented skate had better results than the other pots in the section distribution (31.6%) and the number of times the pot was entered into (20.0%) (p > 0.05). In the comparison of the luring effects between pots with chicken skin inside artificial crab or northern clam and sardine pot, the pot with northern clam + chicken skin had better results than the other pots in the section distribution (22.6%) and number of times the pot was entered into (55.6%) (p < 0.05). The results were also better compared to those of pot with artificial crab + fermented skate. From these results, it seems that in the luring effect aspect, sardine bait can be replaced with artificial bait consisting of chicken skin inside northern clam.

• 수산해양기술연구
• /
• 제57권3호
• /
• pp.185-193
• /
• 2021

This study was conducted to evaluate the performance of the octopus pot according to mesh sizes. Entering behavior of Octopus minor and bait (Macrophthalmus japonicus) escape rate on the mesh sizes of the pots were investigated for six times in indoor tank. The sea trials for evaluating the performance of Octopus minor pot to different mesh sizes (22, 20 and 18 mm) were conducted for six times from 2017 to 2018 in the coastal sea of Deukyang Bay, the Republic of Korea. Behavior patterns of contact pot to leaved pot were more frequent than contact pot to bait search. When the octopus contacted to the pot, there was no clear search behavior to distinguish the mesh sizes. Total catch of 46% was accounted for 18 mm pots, followed by 34% at 20 mm and 20% at 22 mm (P < 0.05). Catch per unit effort was calculated as 30 g/pot at 22 mm, 44 g/pot at 20 mm and 59 g/pot at 18 mm. As a result of evaluating 50% selection of mantle length and weight on the mesh sizes, mantle length (mm) and weight (g) were 84.6 and 147.8 in 22 mm, followed by 20 and 18 mm.

• 현장농수산연구지
• /
• 제24권2호
• /
• pp.5-11
• /
• 2022

Prunus × yedoensis is a representative tree species in residential areas often used as a street tree or park tree, with its popularity due to splendid flowers in the spring. We investigated plant growth, photosynthesis, chlorophyll, and carotenoid concentrations of Prunus yedoensis at 400ml/pot, 1,000ml/pot, and 2,000ml/pot Irrigation treatments. Overall growth indices such as tree height, diameter at root collar (DRC), and total dry weight could be ranked in the decreasing order "2,000ml/pot > 1,000ml/pot > 400ml/pot.". However, 2,000ml/pot featured decreased photosynthesis and total chlorophyll carotenoid contents than 1,000ml/pot treatment after July. And also, The 1,000ml/pot treatment showed relatively high photosynthetic activity and chlorophyll contents. These results suggested that the cultivation of Prunus yedoensis under 1,000ml/pot Irrigation treatment(soil water contents 25~35%) showed the best condition in growth.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
• /
• pp.836-839
• /
• 1996

Throughout CGL (Continuous Galvanizing Line) in steel works, zinc-coated steel sheets are produced which are used where long-running corrosion resistivity is required. During the galvanizing process, top dross is created and floated on the zinc pot. Because the dross leaves ill patterns on the coated sheets, a robot system is developed to automatically collect and remove the top dross. It consists of a robot and its carriage system, a pot level sensor, a system controller, and special robot tools. For the first time the level of zinc pot must be measured and fed back to the robot controller to avoid submersion of the robot hand into the hot zinc pot. In this paper, acoustic distance sensor is tested as a candidate for the pot level sensor in the view point of hot environment. Some considerations on the use of the acoustic distance sensor will be denoted.