• Journal of Mushroom
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• v.7 no.1
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• pp.22-26
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• 2009

These experiments were conducted to find the optimum mixing rate of used media for saving the production cost of Flammulina velutipes. The materials for media formation was used needle-leaf tree sawdust, media that finished 1th cultivation of F. velutipes, corncob meal, and rice bran, wheat bran as nutrition source. We inoculated the F. velutipes in 14 kinds of different media types and checked the spawn growth speed, fruit body quality and quantity. Two nutrition agents, which is rice bran and wheat bran, did not affected the incubation period, but the effective stem number, quality and quantity of fruit body was better at rice bran than wheat bran. The quality of fruit body produced at mixed 20% of used media (needle-leaf tree sawdust 60% + used media 20% + rice bran 20%) was similar to control plot (needle-leaf tree sawdust 80% + rice bran 20%), but the yield was improved 10% than control plot 130g. According as the used-media mixing amount increases, quality and quantity of fruit body became low remarkably. Therefore, the optimum mixing amount of used-media was 20% and it increased 10% of fruitbody yield.

• Journal of Bio-Environment Control
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• v.7 no.2
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• pp.144-150
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• 1998

It was studied about the effects of irrigation schedules by integrated solar radiation on fruit sweetness of cherry tomato in perlite and polyurethane(PUR) culture. In PUR culture. the brix % was decreased with frequent irrigation and their differences were increased as high as the cluster. The brix % in PUR culture was higher than in perlite culture and their differences were large in proportion as the Plant grew when the Percentage of drainage was 25%. The a＊ value, expressing red color. was not affected by irrigation schedules when the medium was PUR. On the other hand, the value of a＊ in PUR was higher than that in perlite. and its tendency was large as high as the cluster. The fresh weight of fruit was higher in perlite culture than in PUR culture. From this study it Is recommended that the percentage of drainage is maintained to 25% in PUR culture in view of Productivity and quality of fruits.

• Journal of Bio-Environment Control
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• v.15 no.4
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• pp.412-416
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• 2006

A magnetic field oscillator was designed and made. The oscillator was installed around a water pipe and radiated into water which was provided for vegetables cultivation. The oscillator was made with a helmholtz coil and installed a magnetic field sensor inside. The class E amplifier circuit with frequency variance was also used. Hydroponic and soil cultural methods were used for cultivation of lettuce and chinese cabbage with magnetic field water and without. Vitamin C ingredients in the lettuce and chinese cabbage which were grown with magnetic field water were 2.8 times and 1.2 times higher than without the magnetic water. Moreover, the growth acceleration effect of vegetables was shown in lettuce cultivated with the magnetic field water.

• The Korean Journal of Mycology
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• v.38 no.2
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• pp.125-129
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• 2010

This study was carried out to elucidate suitable spawn culture for an artificial cultivation of Neolentinus lepideus. The optimum culture conditions of the liquid spawn were deffated soy flour for main material, 12 days for culture period and 0.9 vvm for aeration volume, respectively. Sawdust spawn was appropriate for douglas fir sawdust and deffated corn flour (95 : 5, v/v) for mycelia growth and fruiting body formation. In case of liquid spawn, cultivation period was two shorter than sawdust spawn and mushroom yield was 111.9 g per 850ml cultivation bottle. In conclusion, the suitable spawn for fruiting body production was found to be liquid spawn than sawdust spawn with considering cultivation period and mushroom productivity.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.48 no.3
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• pp.191-195
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• 2003

This study was conducted in 2001 to develop a technique for mass production of superior seed tuber by using a wick culture system as an alternative plan to solve problems in hydroponic culture of potato. Potato (Solanum tuberosum L. cv. Dejima) plug seedings were planted on a styrofoam bed (volume $0.032\textrm{m}^3$) containing two different media (Jeju scoria + peatmoss and perlite + peatmoss, (1:2, v/v) mixture, respectively). Each bed was equipped with various number of wicks (2, 4, 6, 8 and 10 ea/bed). After harvest, the total porosity of both media was 83-85%. Bulk density of Jeju scoria + peatmoss was higher compared to that of perlit + peatmoss. However, the number of wicks did not influence to the bulk density. Conversely, moisture capacity of Jeju scoria + peatmoss was remarkably greater than that of perlite + peatmoss and was increased from 55 to 70% as elevating number of wicks. Although the number of wicks resulted in the areal growth of plants, the total yield and the weight of tuber were highest at the bed equipped with six wicks in both media.

• Journal of Bio-Environment Control
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• v.18 no.4
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• pp.413-419
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• 2009

The appropriate dripper position in perlite bag was investigated for tomato production. Drippers were laid at 5(F5), 15cm (F15) away from the stem base or 5cm at first and then moved to 15cm later (M5-15). Roots were developed more near the stem base in F5, while less in F15. Roots were distributed evenly in M5-15. In vertical distribution of water in perlite bag, water content was higher as it went deeper with the variation by dripper positions. Yield was high in F15 and low in F5. In conclusion the position of dripper is the best at 15cm from the stem base in perlite bag culture in view of root distribution and yield.

• Journal of Mushroom
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• v.4 no.1
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• pp.39-42
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• 2006

Cauliflower mushroom(Sparassis crispa) contains much amount of ${\beta}$-glucan, which make lots of farmer want to cultivate the mushroom. Since a practical cultivation method is not provided yet, the mushroom is considered as a difficult crop to deal with. In this study, we tried to develope a simple method to cultivate the mushroom by use of coniferous sawdust-based medium with wheat flour and molasses. There was no significant differences between the sawdust spawn and the liquid spawn for the mycelial growth of the mushroom. The cold shock in $4^{\circ}C$ for a day was thought to be the best way to seduce primordium formation. The sawdust medium of Pseudotsuga menziesii mixed with wheat flour, corn chip, cottonseed meal and 10% molasses was showed the best yield with 41% followed by that of Larix leptolepis mixed with the same additives with 37% of yield. There was good relations between the fruit-body production and the weight loss of the sawdust substrate.

• Journal of Bio-Environment Control
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• v.18 no.2
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• pp.137-141
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• 2009

This experiment was investigated to effect of divided rhizome size and medium type on survival rate and growth of wasabi for 60 days in controlled growth room. In divided rhizome size of 5mm above, survival rate was 100% and their growth (plant height of 12cm and leaf number of 3${\sim}$4 per plant) was good at 30 days after wrapped-sphagnum treatment. Plant height was 20cm above and number of leaves increased in 1-2 per plant at 60 days after treatment. Survival rate and growth didn't show any effect on plant regulator of root-tone. In inorganic media (saprolite and aerated light stone) treatment, survival rate of wasabi in divided size of 5${\sim}$10mm showed 83% or above at 30 days in deep flow culture. Growth did not show significant difference of inorganic support media treatments. Therefore, it is possible for divided rhizome size of 5mm above to do production of seedlings by acclimatize for 30 days in hydroponics under controlled growth chamber.

• Journal of Bio-Environment Control
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• v.9 no.2
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• pp.73-78
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• 2000

This study was carried out to investigate appropriate processing conditions for expanded rice hulls to be used as a medium material in nutrient cultures. The water holding capacity of expanded rice hulls produced by using a domestic grinder with 8 mm gap and 3 mm cutter height was 271.0, and the bulk density and CEC were 0.19g·m-3 and 37.0 cmol·kg-1, respectively. These values are higher than those of perilte. However, geometric mean diameter (GMD) of expanded rice hulls was 1.01mm which was smaller than that of perlite, indicating unfavorable porosity. After supplying nutrient solution, the faster water percolation in expanded rice than perlite required more frequent water supply. There was no significant difference in tomato fruit yield between expanded rice hull and perlite. The pH increase and the lack of nitrogen in early stage of culture are to be solved in the future.

• Journal of the Korean Society of Food Science and Nutrition
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• v.38 no.2
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• pp.211-216
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• 2009

This study was conducted to determine whether Pleurotus ostreatus (oyster mushroom), cultivated in various ratios with herbal extract remnants instead of cotton supplemented with nutrients (the control), improved mycelial growth, mushroom yields and longevity during storage. In addition, we investigated the transfer of medicinal herb components into the mushrooms since they contained non-specific medicinal herbs and their composition could not be controlled. Mushrooms cultivated with 70% and 100% medicinal herb remnants had faster growth rates, higher yields and less failure in the development of the fruit body than the control group. There were no differences in HPLC chromatogram among the methanol extracts of Pleurotus ostreatus in all groups. In addition, glycyrrhizin, an indicative compound of licorice which was a major herb among the herbal remnants, was not detected in any of the extracts. Pleurotus ostreatus that was cultivated with 70% and 100% herbal extract remnants had improved storage longevity in comparison with the control. They exhibited the least weight loss during storage among the groups and they maintained firmness in the stipe and pileus. However, the sources of media did not alter the color difference of the stipe and pileus or the quality index of the outward appearance during storage. In conclusion, cultivating media that contained over 70% of medicinal herb extract remnants increased the growth rates and yields of Pleurotus ostreatus. In addition, these mushrooms had enhanced storage longevity due to their firmness. Therefore, medicinal herb extract remnants should be utilized in the cultivating media of various mushrooms.