• The Korean Journal of Malacology
• /
• v.24 no.2
• /
• pp.109-119
• /
• 2008

In order to investigate the possibility of yearly-harvest, we carried out growth experiment(shell height, meat weight and condition index) for of the artificial oyster spat, which suspended in three different times before the season for natural spat around coastal waters of Gyeongnam Province. Shell growth of spats suspended in June showed higher than those in April and May. In meat weight, the growth of spats was significantly elevated from October, of which significant difference was observed depending on growing farms(Gosung$\geq$80 mm) and October on the meat weight level($\geq$5 g).

• Journal of Mushroom
• /
• v.9 no.1
• /
• pp.44-47
• /
• 2011

This study was carried out investigate optimal additive content of spent medium from oyster mushroom in Volvariella volvacea cultivation. The formation of spent mushroom medium from oyster mushroom consisted of 50% pine sawdust, 30% beet pulp and 20% cotton seed hull pellet. The higher amount of spent medium from oyster mushroom resulted in higher total nitrogen content and C/N ratio of medium decreased according to increasing mixing ratio of spent medium from oyster mushroom. The fruit body yield and biological efficiency of supplemented with 50% spent medium from oyster mushroom was same level of non additive medium.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.53 no.4
• /
• pp.376-381
• /
• 2008

Anthocyanin contents of black soybean were analyzed for development of superior breeding lines with high anthocyanin contents. Total 292 genotypes of black soybean collected through the whole country were analyzed by HPLC in which C3G (Cyanidin-3-Glucoside), D3G (Delphinidin-3-glucoside), and Pt3G (Petunidin-3-Glucoside) were detected main anthocyanin pigments and each pigment contents were significantly different according to genotypes. C3G content showed the highest value in all materials and its variation was also wide, whereas D3G and Pt3G were not detected in 4 and 24 genotypes. Mean value of C3G, D3G, and Pt3G contents were $8.05{\pm}4.225$, $1.80{\pm}0.854$, and $1.15{\pm}0.781\;mg/g$, respectively. In case collected sites, genotypes collected in Chungnam region were higher the anthocyanin contents than other collections, which was $13.75{\pm}3.861\;mg/g$. It might be concluded that it takes more than 36 days for anthocyanin accumulation since beginning of seed-coat pigments formation, in that case it showed $13.09{\pm}4.190\;mg/g.$. Also total anthocyanin contents were present higher concentration in seed coat as maturation period was longer from flowering stage.

• Journal of Mushroom
• /
• v.10 no.4
• /
• pp.160-166
• /
• 2012

The effects of fixed and variable temperatures on fruiting body formation and characters of mushrooms were investigated with normal and thinning treatment plots. In fixed temperature, as temperature was lower, period of harvest was longer as well as days for pinheading in the both of normal and thinning plots. Harvest rate were 91.0, 90.3, and 95.8% at $13^{\circ}C$, $17^{\circ}C$, and $15^{\circ}C$. In the thinning plot, qualities of mushrooms were 7.5, 8.1, and 7.7, and yields were 86.0, 105.9, 104.0g at 13, 15, and $17^{\circ}C$ respectively. In variable temperature with a variable temperature plot, condition II($17^{\circ}C$ for pin-heading(before reverting, 7-8 days)${\rightarrow}16^{\circ}C$ for extending primodia(before thinning, 4-5 days)${\rightarrow}15^{\circ}C$ for extending (after thinning)) was the best for yield which was better than other conditions by 17.4% and 4.0% and quality of mushroom was highest 8.1 among all conditions.

• Journal of Mushroom
• /
• v.10 no.4
• /
• pp.179-183
• /
• 2012

This study was conducted to determine proper amount of media and the effect of fermented sawdust on yield of Grifola frondosa in bag culture. The yield of Grifola frondosa was 227 g for 2 kg of media compared with 103 g for 1kg, 256 g for 2.5 kg, and 312 g for 3 kg. The greatest yield of Grifola frondosa per mass of media was 114 g/kg media for 2 kg of media. Days to harvest for 2 kg of media was 95 days compared with 93 days for 1kg, 99 days for 2.5kg, and 104 days for 3kg. Addition of fermented oak sawdust increased yield from 90 to 145 g/kg bag for Hambak cultivar and from 104 to 121 g/kg bag for Yipsae1ho cultivar. Culture duration was shorten 4-7 days by treating fermented oak sawdust.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.59 no.3
• /
• pp.325-331
• /
• 2014

The purpose of this study was to establish the proper sowing time and planting density of cowpeas for labor-saving cultivation. Experiments were carried out in Naju, Jeonnam Province (Latitude $35^{\circ}$ 04' N, Longitude $126^{\circ}$ 54' E) during 2012 and 2013. The intermediate-erect type strains used in this study were Jeonnam1 and Jeonnam2. Sowing was performed five times between June 25 and August 5 at approximately 10-day intervals in order to establish proper sowing time, and sowed at 5,000, 10,000, 15,000, and 20,000 plants per 10a to establish proper planting density. The days from sowing to first flowering was shortest (32 days) in plants sowed on July 25 and became longer for plants sowed on or around July 25. The days from sowing to first flowering was longest (41 days) in plants sowed on June 25. The days from first flowering to first maturing was shortest (8 days) in plants sowed on June 25 and, became considerably longer at later sowing dates. The days from first maturing to first harvesting ranged from 8 to 10 days, with little difference among the sowing periods. Plants sowed on August 5 harvested at the same time, and plants sowed between June 25 and July 25 were harvested either three or two times. The yield was highest in plants sowed on July 25: 209 kg/10a was harvested for Jeonnam1 and 221 kg/10a for Jeonnam2. Furthermore, harvested at the same time enabled when the harvesting was delayed for around 15 days because the share of the seeds first harvested was highest (91%). The proper planting density was estimated to be 15,000 plants/10a, showing the highest yields of 199 kg/10a for Jeonnam1 and 224 kg/10a for Jeonnam2.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.60 no.2
• /
• pp.139-145
• /
• 2015

Rice ratooning is the production of a second rice crop from the stubble left behind after the main-crop harvest. The main advantage of rice ratooning is that in areas where rice is the main crop, double crop of rice can be grown for additional returns. Eight cultivars of rice were tested for estimation their ratooning ability. The main crop was harvested at mass maturity, after which the tillers were mowed to stubbles of about 10 cm tall. And then left without any further input, until the ratooned plant were ready for harvest. Highly significant variations were detected in the ratoon performance among cultivars, with ratoon ability ranging from 0% ('Unkwang', 'Jopeyong', 'Odae', 'Nokyang') to 33% ('Jinbuol') in their grain yield. The maximum grain yield from ratoon rice was 202 and 203 kg/10a for 'Jinbuol' and 'Joun' followed by 'Junamjoseng' 174kg/10a. Protein and amylose contents of ratoon rice were more increased than those of main rice. The platability value of cooked rice of ratoon was lower than that of main crop. Germination rate of the previous year's harvest of rice was not significantly different between ratoon and main crop. This rice ratooning system requires short duration, creating possibility for growing another crop in the same cropping year and offers an opportunity to increase cropping intensity per unit of cultivated areas.

• Journal of Bio-Environment Control
• /
• v.19 no.2
• /
• pp.77-81
• /
• 2010

The effects of $CO_2$ concentration on fruit-body formation and yield of Pleurotus ferulae (KME65003) mushroom were examined in the growing facilities for bottle cultivation. The $CO_2$ concentration levels in the growing facilities were 500 ppm, 1000 ppm, 1500 ppm and 2000 ppm of $CO_2$, controlled by different ventilation amount. Yield of fruit body was highest of 102.4 g/bottle at 1000 ppm treatment and lowest of 75.1 g/bottle at 2000 ppm. As the $CO_2$ concentration increased up to 2000 ppm, the first pinhead formation and fruit-body growing period took longer, so total growing period took 16 days at 500 ppm, but 23 days at 2000 ppm. The number of pinhead formation was highest of 12.2/bottle at 1500 ppm and valid stipes was highest of 2.8/bottle at 1000 ppm. Fruit body characteristics such as pileus and stipe diameter, and stipe length were not significant at different $CO_2$ concentration. The fruit body ratio of 20~50 g range among the whole fruit body which was classified by weight was highest of 60.3% at 1000 ppm. As a result, the suitable $CO_2$ concentration of growth and yield of Pleurotus ferulae was showed as 1000 ppm.

• Journal of Mushroom
• /
• v.8 no.1
• /
• pp.6-10
• /
• 2010

A new commercial strain of Agrocybe chaxingu, "Dasan", was developed with crossing between monokaryotic strain derived from Jinhyang and GWM20502 strain. The optimum temperature, carbon source and nitrogen source for mycelial growth were $25{\sim}30^{\circ}C$, glucose and ammonium chloride, respectively. The period of primordia formation and fruiting body growth were about 12~13days and 6~8days in bottle cultivation using Georgia pine sawdust which supplemented with 30% wheat bran. The yields was 118.2g/850mL bottle, and the color of pileus was brown.

• Proceedings of the Plant Resources Society of Korea Conference
• /
• 2022.09a
• /
• pp.83-83
• /
• 2022

유채(Brassica napus L.)는 가을에 파종하여 이듬해에 초여름에 수확하는 겨울작물로 종실 수량이 많고 종자의 조지방 함량이 높아 주로 기름을 생산하기 위해서 재배되고 있다. 우리나라에서 유채는 경관을 목적으로 주로 재배되며 면적은 약 5,000ha 정도 재배되고 있다. 최근에는 유채유 생산을 목적으로 전남 등 남부지방에서 재배면적이 증가하고 있다. 유채유의 대량 생산을 위해서는 재배과정의 생력기계화에 유리한 논 재배가 주로 이루어지고 있다. 따라서 유채의 육종은 논 재배 적응성이 뛰어나며, 벼와의 작부가 가능하며 봄 파종 재배가 가능한 조숙품종의 육성이 필요하며, 식용유로 이용이 가능한 지방산 조성이 우수한 품종의 육성도 필요하다. 본 연구는 농촌진흥청 농업유전자원센터에서 보유하고 있는 유채 유전자원 350점을 대상으로 작물학적 생육특성을 평가하였고 종자를 수확한 후 지방산 조성을 분석하였다. 생육특성은 경장 등 12항목을 유채 유전자원 특성조사 및 관리요령(RDA, 2011)을 기준으로 조사하였다. 가을에 파종하여 재배할 때 개화소요일수는 파종 후 137일부터 210일까지 소요되었으며, 봄 파종 재배 시에는 파종 후 65일부터 150일까지 개화가 진행되었고 개화가 되지 않은 계통이 67계통이었다. 경장은 85 ~ 211cm, 수장은 28 ~ 79cm, 분지수는 5 ~ 21개, 수당 협수는 29 ~ 106개, 협당 종자수는 18 ~ 35개 및 협장은 2.7 ~ 8.8cm로 다양하였다. 유채 유전자원의 지방산 중 올레산과 에루스산 함량은 각각 9.7 ~ 70.4% 및 0 ~ 54.7% 범위였다. 공시계료 중 IT 279089 등 3자원은 개화기가 빨라 조생종 육성에, IT279125 등 3자원은 올레산 함량이 68%이상으로 양질 지방산 품종 육성재료로 활용할 예정이다.