• Korean Journal of Organic Agriculture
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• v.24 no.4
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• pp.719-733
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• 2016

This study was carried out to investigate the effect of no-tillage on sequential cropping supported from recycling of first crop ridge on the productivity of crop and physical properties of soil under green house condition. This study is a part of "No-tillage agriculture of Korea-type on recycled ridge". From results for distribution of soil particle size with time process after tillage, soil particles were composed with granular structure in both tillage and no-tillage. No-tillage soil in distribution of above 2 mm soil particle increased at top soil and subsoil compared with tillage soil. Tillage and one year of no-tillage soil were not a significant difference at above 0.25 mm~below 0.5 mm, above 0.5 mm~below 1.0 mm, and above 1.0 mm of water-stable aggregate. Two years of no-tillage soil was significantly increased by 8.2%, 4.5%, and 1.7% at above 0.25 mm~below 0.5 mm, above 0.5 mm~below 1.0 mm, and above 1.0 mm of water-stable aggregate, respectively, compared with one year of no-tillage. Bulk density of top soil was $1.10MG\;m^3$ at tillage and $1.30MG\;m^3$ at one year of no-tillage. Bulk density of top soil was $1.14MG\;m^3$ at two years and $1.03MG\;m^3$ at three years of no-tillage, respectively. Bulk density of subsoil was a similar tendency. Solid phase ratio in top soil and subsoil was increased at one year of no-tillage compared with tillage soil, while soil phase ratio decreased at two and three years of no-tillage. Pore space ratio in tillage top soil (58.5%) was decreased by 8.5% at compared with no-tillage soil (51.0%). Pore space ratio was 56.9% and 61.2% at two and three years of no-tillage soil, respectively. Subsoil was a similar tendency. Gaseous phase ratio was decreased at one year of no-tillage soil, and increased at two and three years of no-tillage soil compared with tillage soil. Liquid phase ratio in top soil was increased at one year of no-tillage (28.3%), and decreased at two years (23.4%) and at three years (18.3 %) of no-tillage soil compared with tillage soil (24.2%). Subsoil was a similar tendency. Liquid phase ratio in subsoil was increased than top soil.

• Korean Journal of Plant Resources
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• v.9 no.2
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• pp.151-155
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• 1996

For improvement germination rate of Cirsium setidens, wet seeds were storaged for 20 to 80 days at $4^{\circ}C$ and germinated at $18^{\circ}C$ in the dark or light condition. To assess the effects of shading and plant age on the growth, fresh yield and seed yield under rain shelter in highland at altitude of 800m above sea level, seeds were sown in an open field in late september,1990. In early May the next the seedlings were transplanted for vegetatable and seed production in the plastic houses for rain shelter. They were grown from 1991 to 1993 in the houses covered with the shading nets ranging from 0 to 70% for vegetable production and 0 to 50% for seed production. Germination rate inceased as the storage period lengthened, and the rate came to $60\sim80%$ at 60days after germination. It was more effective in lighting than in darkness. For vegetable production, the shading net treatments showed more values in almost the characters checked at the third year than the non-shading treatment. No. of stem, no, of leaves, stem length and degree of softening were no different between shading net treatments, but the other characters were significantly different. Ratio of survival, density of chlorophyll and ratio of dry matter of plants were highest in the plots of 50%, 70%, and 30% of shading, respectively. The highest fresh yield was recorded from 2-year plants, 70% of shading from them showed the greatest yield. The highest seed yields were produced 2-year-old plants of non-shading plot. For seed production, the non-shading treatment is best, and the highest seed yields were obtained in both the second and third years.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.10a
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• pp.52-52
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• 2019

산채는 사람에 의하여 개량 육성되어 논밭에서 재배하고 있는 농작물과 달리 자연 그대로 산야에서 자생하는 식물 중 식용으로 가능한 것을 말한다. 우리나라 산야에는 480종의 식물이 식용으로 이용될 수 있다고 하나 현재 전국에서 재배하고 있는 작목은 36종으로 추정되며, 앞으로도 80여 종이 개배 가능한 작물로 추정된다. 산채류의 이용형태별 생산가능시기는 3~5월의 생채 생산과 6~7월의 건채 생산으로 소비자의 기호에 부합하는 신선 생채의 소비한계는 제한되어 있기 때문에 재배유형별 생채 수량검정을 통해 수확시기 연장 및 재배품목을 다양화 시킬 필요 있다. 이에 본 시험은 산채류 재배유형별 수확기간을 구명하고자 표고 500 m의 전북 남원시 허브산채시험장에서 2018년 5월 말 갯기름나물 등 15 종을 노지와 하우스에 정식하여 각 작물의 생육특성, 수확한계기 등을 조사하였다. 1년차 지상부 생육특성을 조사한 결과 참취, 개미취, 섬쑥부쟁이, 질경이, 갯기름나물, 두메부추, 돌단풍, 참당귀의 경우 초장, 엽장 등은 노지보다 하우스에서 높은 편이었고 생존율은 비슷하거나 하우스에서 더 높은 경향을 보였다. 우산나물, 단풍취의 생존율은 하우스에서 더 높았으나 생육 초기 엽소현상으로 인해 1년차 생육은 노지, 하우스에서 둘 다 저조하였고 곤달비, 어수리, 곰취, 눈개승마의 경우 노지에서는 7월 중순이후 지상부가 전부 고사하였으나 하우스에서는 생존율이 상대적으로 양호하여 11월 상순까지 후기 생육을 하였다. 2년차 산채류 출현기 조사한 결과 하우스 재배에서 산마늘이 2월 중순으로 가장 빨랐고 갯기름나물, 곤달비 등 10종이 2월 하순에 출현하였으며 참당귀 3월 상순, 단풍취 및 우산나물 3월 중순, 돌단풍이 가장 늦은 3월 하순에 출연하였다. 생체수확 시기는 갯기름나물, 눈개승마, 산마늘, 두메부추, 섬쑥부쟁이는 3월 중순부터 가능했고 곤달비 등 12개종은 3월 하순, 우산나물은 4월 상순, 돌단풍은 4월 중순으로 가장 늦게 생체수확이 가능했다. 노지 재배의 경우 산마늘과 눈개승마가 3월 중순으로 가장 빨랐고 갯기름나물 등 10종이 3월 하순에 출현하였으며 돌단풍, 참당귀, 단풍취가 4월 상순으로 가장 늦은 출연을 보였다. 생체수확 시기는 눈개승마와 산마늘이 4월 상순으로 가장 빨랐으며 갯기름나물 등 10종이 4월 중순부터 가능했고 돌단풍, 참당귀, 단풍취가 4월 하순으로 가장 늦었다. 수확한계기 조사 결과 눈개승마, 산마늘, 우산나물은 하우스 및 노지재배에서 20일정도로 가장 짧았으며 그 외 작물들은 계속적으로 수확이 가능하였으나 6월 상순 이후에는 품질이 나빠져 생체상품으로서 가치가 없었다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.39 no.2
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• pp.175-179
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• 1994

This experiment was carried out to investigate the effect of improved NPK fertilizer and ameliorator application methods on job's tears yield and soil properties in the newly-reclaimed land from 1985 through 1988. Job's tears height of integrated improvement plot was higher than the other plots, and increased from the 1st and the 2nd year, but decreased from the 3rd year when soil conditioner was not applied. Average yield of the crop in the integrated improvement plot was 2.16 t /ha being increased by 49% more than the control plot, and the yield was the greatest in order of integrated improvement>subsoiling>phosphate>lime>compost>control plot. Soil bulk density and hardness of the topsoil decreased to the 3rd year, but increased in the 4th year. Soil pH of the topsoil was not changed significantly by different soil depths and cultivated years.

• Korean Journal of Plant Resources
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• v.19 no.2
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• pp.248-251
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• 2006

The growth of stem and leaves in Saururus chinensis. in the 2nd year was markedly increased comparing to that in the 1st year, however the growth in the 3rd you was not increased significantly. The growth in the 1st yew was greater in low planting density, while the growth in the 3rd year decreased in higher planting densities. The num- ber of leaves and stems per unit area increased in higher planting densities and later years. The weight of stem and leaves in Saururus chinensis was higher at the highest planting density in the 1st yew, at $40{\times}10cm$ planting in the 2nd year and at $40{\times}20cm$ planting in the 3rd year. The weight of rhizome in Saururus chinensis increased greatly in the 2nd you comparing to that in the 1st year, but the increase was insignificant in the 3rd year. The weight of rhizomes in Saururus chinensis showed significant interaction between planting densities and years showed highly significant difference.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.60 no.2
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• pp.217-223
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• 2015

This study was conducted to serve as a basis for establishing a stable production of proso millet on the rotational paddy-upland field by looking out the physicochemical and moisture characteristics of soil and the growth characteristics of proso millet by ridge width. Plant height showed Manhongchal was the smallest 71.3 cm in 240 cm wide of ridge in the first year, Ibeakchal was the highest 69.7 cm in 60 cm wide in the second year, Hwanggeumchal was the highest 72.8 cm in 60 cm wide in the first year. The retention time of the excess water in the soil during cultivation was extended wider the width of ridge. The variation width of the water content was higher by the wider the width of ridge. Yield components showed the longest ear length were 35.1 cm of Manhongchal, 34.8 cm of Ibeakchal in 60 cm wide of ridge in the first year. As the width of ridge extended, ear weight of all variety increased. 1,000 seed weight of the 60 cm wide of ridge was Manhongchal 6.8%, Ibeakchal 46.2% heavier than the 240 cm wide of ridge. Yield showed Manhongchal 221, Ibeakchal 223, Hwanggeumchal $225kg{\cdot}10a^{-1}$ in 60 cm wide of ridge in the first year. The similar pattern of amount showed Manhongchal 278, Ibeakchal 221, Hwanggeumchal $200kg{\cdot}10a^{-1}$ in 60 cm wide of ridge in the second year. This showed Manhongchal 103%, Ibeakchal 119%, Hwanggeumchal 85.2% was more than the 240 cm wide of ridge.

• Applied Biological Chemistry
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• v.23 no.3
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• pp.184-188
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• 1980

A survey of pesticide and copper residues of the citrus orchard soil was conducted during October 1979-June 1980 in Jeju, Seogwipo county. The citrus orchards were classified into five groups according to different cultivated period; 5 year orchard, 10 year orchard, 15 year orchard, 20 year orchard, and 30 year orchard. Each of the above samples was divided again to three layers of soil depth; the surface layer$(0{\sim}10cm)$, the middle layer $(10{\sim}20cm)$, and the bottom layer $(20{\sim}40cm)$. In this experiments, Kelthane and Akar, as well as copper residues were detected in all soil samples. Residue levels of above chemicals were increased in soils of orchard with longer cultivation periods, and at the same time, decreased with soil depth. The residues of those ranged as follows; a) from trace to 1.359ppm in Kelthane, b) from trace to 0.925ppm in Akar, and c) from trace to 40.734ppm in copper. It is noted that the average residues of Kelthane was 0.251ppm, Akar, 0.120ppm, and that of copper was 2.168ppm, respectively.

• Korean Journal of Environmental Agriculture
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• v.19 no.1
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• pp.20-25
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• 2000

Leather processing sludge were amended in sandy loam soil successively to investigate effects on soil properties and radish crop. Total nitrogen concentration of the sludge was $60\;g\;kg^{-1}$, and chromium was $9,048\;mg\;kg^{-1}$. Sludges were treated twice each year for 4 year, and the soils were mixed with sludge to give mixtures equivalent to sludge application rates of 12.5, 25 and $50\;Mg\;ha^{-1}\;yr^{-1}$ in dry matter. Chemical fertilizers $(N-P-K\;:\;280-59-154\;kg\;ha^{-1})$ used as a control. All treated soils were croped to altari and kimjang radish in spring and fall respectively. Organic matter and Cr content in soils were increased with input rate and years of successive application of leather processing sludge, while phosphorous and potassium contents were decreased. Yields of the first harvested altari grown in sludge treated pots were less than control. In the other hand, yields of the first kimjang radish were more than control in proportion with sludge input rates until third year fall. But in fourth year, all sludge treated pot was much less than control in radish yield. Chromium contents of radish in treated soil increased and Cr contents in leaves of radish were higher than roots. Leather processing sludge was considered a potential hazardous resource to soil and crops when it use continuously, because it has high Cr concentration.

• Korean Journal of Environmental Agriculture
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• v.17 no.3
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• pp.274-278
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• 1998

To observe the stimulating effects of low-dose ${\gamma}-radiation$ on the Chinese cabbage, $1{\sim}5$ years old seeds were cultivated in the green house and the experimental field after irradiation of $0.5Gy{\sim}30.0Gy$ and the growth characters of them were investigated. The germination rates and the seedling heights of old seeds increased positively in the green house, but different from each other depending on their period of storage. Those of 3-, 4-, and 5-year old seeds increased remarkably at the 4.0Gy-, 1.0Gy-, and 0.5Gy-irradiation group respectively. However, in the case of 1-year and 2-year old seeds, there were not significant effects of irradiation except the increase of seedling height. There were significant increasing effects of radiation on the plant height, fresh weight, and diameter of all seeds grown in the experimental field of 4.0Gy- and 8.0Gy-irradiation group, including the corresponding effects of 1-year and 2-year old seeds in 20.0Gy- and 30.0Gy-irradiation group.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.10a
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• pp.90-90
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• 2018

고사리(Ferns)는 고사리 속(Pteiidium spp.)에 속하는 양치식물의 총칭으로서 우리나라에는 22과 70속 272종이 분포되어 있는 것으로 보고되었다. 고사리의 어린 순에는 가식부 100g 당 칼슘 15.0mg, 칼륨 185.0mg 등이 함유되어 있으며 골다공증, 심혈관질환 등에 효과가 있고 식이섬유로 인해 변비 예방에도 유용한 것으로 알려져 있다. 2017년 기준 우리나라의 고사리 재배면적은 3,280ha 수준으로 그중 전라북도의 고사리 재배는 재배면적 285ha이며 연간 생산량 1,985톤으로 전국 생산량의 21%를 차지하고 있어 전라북도의 산채 재배작목 중 중요한 비중을 차지하고 있다. 고사리 재배는 정식 후 수확기간이 길고 제초노력 등의 노동력 의존도가 상대적으로 낮아 최근 재배면적이 늘어나고 있는 추세이나, 종근의 적정 규격 등에 대한 기준이 제시되지 않아 경영비 부담이 큰 실정이다. 본 연구는 고사리 종근 규격을 종근 두께 기준 A등급($14.1{\pm}3.31mm$), B등급($8.3{\pm}1.88mm$), C등급($3.3{\pm}2.31mm$)로 구분하여 표고 500m의 허브시험장 연구포장에 3월 28일 정식한 후 2018년 4월부터 신초 출현양상 및 수량성을 조사하였다. 파종 2년차 고사리 신초의 출현양상은 4월 11일부터 출현을 시작하여 6월 11일 까지 빠르게 증가하여 7월 9일 이후 고온기이후 증가세가 완만해지는 경향을 보였고 9월 10일까지 누적 신초수는 A 등급 파종구에서 80.0개를 보였다. 신초 출현 후 포자엽이 전개되어 상품성을 상실하기까지의 포자엽 전개일수는 주 수확시기인 4~5월에는 5.3~6.7일이 소요되었으나, 포자엽 전개이후 울폐가 이루어지는 8~9월에는 9.7~11.7일이 소요되어 생육 초기 차광에 의한 전개일수 연장효과가 기대되었다. 생육기간 동안 조사시기별 신초의 두께는 6월 11일과 9월 11일 조사한 신초에서 굵어지는 경향을 보였고, 상품성 있는 고사리 신초의 규격을 신초장 20cm로 포자엽 전개 직전으로 한정하여 수확을 실시한 결과 파종 2년차 수확은 4월18일 이후 4회 이루어졌으며 신초의 생체중은 5.2~6.0g/개의 범위로 종근 규격 간에는 차이가 인정 되지 않았다. 4월 18일에서 5월 8일까지의 수확기간 동안 누적 신초 수확량은 A 등급과 B 등급의 종근을 파종한 처리에서 각 32.2개/$m^2$, 30.3개/$m^2$로 C 등급 파종구에 비해 유의하게 수확 신초수가 증가하였다. 단위면적당 신초 수량성은 4월 30일 3회차 수확시부터 종근 규격간 차이가 있었으며 누적 신초수량은 A 등급과 B 등급 파종구에서 각 183.3kg/10a, 169.9kg/10a로 유의하게 높았는데 이는 파종된 종근의 두께에 따라 상품성 있는 신초 출현수가 유의하게 증가된 때문으로 판단되었다.