• 아시안잔디학회지
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• 제7권2_3호
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• pp.61-66
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• 1993

This experiment was carried out in order to study effect of organic fertilizer on the growth of Korean lawngrass(Zoysia matrella L. Merr.) and the change of soil chemical characteristics. Results obtained are summarized as follows: l. Organic fertilizer was appropriate for base-dressing in the establishment of turfgrass by means of sod. 2. Chlorophyll contents in mixed application plot of complex organic fertilizer were more abundant than that in single application plot of organic fertilizer. 3. The yield of dry weight in single application plot of organic fertilizer was greater about 40% than that in control plot. 4. As a whole, the growth of Korean lawngrass in mixed application plot of complex and organic fertilizer was more greater than that in single application plot of complex fertilizer. 5. Application of organic fertilizer promote effectiveness of available phosphorous in soil.

• 농업과학연구
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• 제42권3호
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• pp.167-175
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• 2015

The present study aimed to investigate the effects of drought stress on the accumulation of glucosinolates (GSLs) in the leaves of Kale cultivated in autumn and spring. HPLC analysis guided to identify seven GSLs including progoitrin, glucoraphanin, sinigrin, gluconapin, glucobrassicin, 4-methoxyglucobrassicin and neoglucobrasscin. Quantification of GSLs revealed that the contents of sigirin was the highest (45%) followed by the level of progoitrin (24%) in terms of total GSLs. The ranges of total GSL contents was 1.16 (84)-15.88 (89 DAS, ${\mu}mol/g$ dry wt. (DW)) in treatment plot and 1.23 (84)-7.05 (74 DAS, ${\mu}mol/g$ dry wt.) in control plot showed the enhancement in the contents of GSLs in treatment than in the control plot. The present results evidenced that the variation of total GSL contents were depending on the harvest period. In 105 DAS, comparatively no differences in the GSL contents on each sample in autumn season, whereas in spring season, although there was decrease in the GSLs tendency from 74 DAS to 84 DAS in both control and treatment plot, the GSL contents of treatment plot was dramatically increased in 89 DAS. In treatment plot, the GSL contents on 89 DAS (1.16) was 15 fold higher to 84 DAS ($15.88{\mu}mol/g$ DW). The variation in the contents of GSL in spring and autumn did not documented significant differences because of their differences in the growth time and cultivation conditions. In conclusion, the GSL contents in kale was likely to be affected by drought stress treatment. Scrutiny and further research for exact relation between drought stress and GSL contents in kale should be needed.

• 한국농공학회논문집
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• 제62권4호
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• pp.63-73
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• 2020

The area of paddy fields for upland crop cultivation is gradually increasing. In this context, we developed a chain type mole drainer that can be attached to a tractor to prevent the wet injury of crops. To conduct a field test, we formed underdrains at 2 m intervals in a paddy field wherein soybeans are cultivated, and we investigated the status of the soil moisture, groundwater level, and soybean growth during the cultivation period. The soil moisture content decreased by 22.3~26.8% in the test plot and by 5.9~6.9% in the control plot during a period of 57~88 hour after a rainfall of 41.5~157.0 mm. The effect of underdrainage was clear as the hourly groundwater level decreased approximately 2.8 times faster in the test plot compared with the control plot. Moreover, the soybean yield was greater by 78.6 kg/10a in the test plot than in the control plot. Therefore, for soybean cultivation in paddy fields, the use of the developed mole drainer is expected to help in improving the drainage and increasing the soybean yield.

• 농업과학연구
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• 제30권1호
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• pp.11-19
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• 2003

싸리진디벌 발육은 $25^{\circ}C$와 $30^{\circ}C$에서 각각 평균일수 11.9일과 12.1일로 가장 우수하였다. 그리고 싸리진디벌 성비는 암컷의 발생비율이 높은 $20{\sim}25^{\circ}C$가 가장 사육에 용이한 것으로 나타났으며 우화는 $10^{\circ}C$에서 58.8%, $15^{\circ}C$에서 88.1%, $20^{\circ}C$에서 99.1%, $25^{\circ}C$에서 98.2%로서 우화에 가장 적당한 온도는 $20{\sim}25^{\circ}C$였다. 싸리진디벌 성충의 활동력은 온도와 양의 상관관계를, 복숭아혹진딧물 무시약충의 발육기간은 온도와 음의 상관관계를 나타내었다. 시설내 고추에 발생하는 해충을 조사한 결과, 복숭아혹진딧물이 6.1~1024.4마리로서 가장 많은 발생밀도를 보였으며, 담배나방은 3.3~53.3%의 피해과율을 나타내었다. 싸리진디벌 방사구는 2000년 6월과 7월에 각각 진딧물 173.5마리, 1.8마리, 머미 10개, 17개, 2001년 5월과 6월에 진딧물 7.5마리, 27.1마리, 머미 0.4개, 2.1개로서 무처리구보다는 우수한 방제 효과를 나타내었으며, 농약처리구와는 방제 효과에서 차이가 없었다.

• 한국식품영양학회지
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• 제30권4호
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• pp.703-709
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• 2017

This study analyzed the effect on weight and average daily gain, carcass grade, and blood characteristics and immunity in case of dietary addition of pegmatite to Hanwoo steers. Relative to Hanwoo steers, initial body weight was $257.3{\pm}11.74kg$ (8-months old after birth). Forty-eight Hanwoo steers were fed for 24 months using random arrangement (4 treatment plots${\times}$4 heads${\times}$3 repeat). The treatment plot (498.75~500.82 kg) had higher weight during the early fattening stage compared with that of the control plot (474.37 kg) (p<0.05). Regarding total cholesterol of the blood, the value was similar to one during initiation of testing, but the value increased gradually based on the progress of fattening. In addition, the triglyceride was considerably low in T2~T3 plots with high addition of pegmatite during the late fattening stage compared with other treatment plots (p<0.05). This study revealed a tendency in the IgG content that represented immunity as the addition of pegmatite became higher (p>0.05). This study found that the treatment plot (441.55~452.10 kg) had higher carcass weight compared with the control plot (436.30 kg). However, this study revealed that the treatment plot (2.30~2.55 points) had higher carcass quantity grade compared with the control plot (2.11 points). This study found that the control plot (3.55 points) had higher carcass quality grade compared with the treatment plot (2.67~3.09 points) (p>0.05). With studies combined, it was determined that dietary addition of pegmatite to the feed as clay minerals in fattening Hanwoo steers would improve feed intake, body weight gain and carcass quantity grade.

• 한국토양비료학회지
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• 제46권6호
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• pp.530-535
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• 2013

This study was carried out to investigate the effect of slurry composting and biofiltration (SCB) liquid manure application on shoot growth, fruit qualities and soil chemical properties in peach orchard. SCB liquid manure was fertigated ten times from April to October in SCB plot, whereas chemical fertilizer was treated two times as basal and additional fertilizers in control plot. The shoot growth, leaf nitrogen and potassium content, soil exchangeable K, fruit weight and yield were higher in SCB plot than in control. Soluble solid content and acidity, soil organic matter, soil available phosphate and soil exchangeable Mg showed no significant difference between treatments, and the leaf calcium and magnesium content were lower in SCB plot than in control. In conclusion, fertigating SCB liquid manure in peach orchard has positive effects on fruit weight and yield, and it is suggested that periodical soil testing is needed because of the possibility of K accumulation in SCB liquid manure treated soil when the orchard is fertigated based on the soil nitrogen content.

• 한국연초학회지
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• 제5권1호
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• pp.87-95
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• 1983

This study was conducted to evaluate the affect of soil conditioners and their application rates on the growth, Yield and quality of Flue-cured tobacco. Soil conditioners for this study were Montmorillonite arid Zeolite as clay mineral source and Rice hull and Sawdust as organic source. Their application rates were 500, 1000, 2000kg/10a. The growth of tobacco plants was promoted, compared with that of Non- treated plot (control) by Zeolite, Montmorillonite and Rice hull application but decreased by Sawdust application. During tobacco growing season soil moisture content, compared with control, was increased by Zeolite and Montmorillonite application but decreased by Rice hull and Sawdust application. In contrast to soil moisture content, soil temperature was higher in the Rice hull and Sawdust plot than in the plot of Zeolite and Montmorillonite. The treatment of Sawdust, compared with control, obviously accelerated the maturity of tobacco, increased reducing Sugar but decreased total alkaloids, nicotine and nitrogen content of cured leaves. The Sawdust Plot decreased the Yield (kg/10a) with significant difference by 1 %level but significantly increased leaf quality (Won/kg) and value (Won/10a) by 1%and 5 %level, respectively. The present application , ate of Nitrogen in Korea (12.5kg/10a) seems to be excessive for Flue-cured tobacco production.

• 한국토양비료학회지
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• 제29권3호
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• pp.226-235
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• 1996

논토양에 무연탄회와 유연탄회를 각각 0%, 15%, 30%씩 시용하고 수도를 유리온실 하에서 pot 재배하면서 투수중의 용탈 성분을 경시적으로 분석한 결과는 다음과 같다. 용탈수중의 pH는 재배구에 비해 무재배구의 pH가 높으며 석탄회 처리구에서 대조구보다 pH가 높았고, 재배구에서는 재배에 따라 서서히 감소되는 경향을 보였다. 침투수중 $NH{_4}^+-N$, $NO{_3}^--N$, K의 용탈은 7월 이후 급격히 감소되며 재배구에서는 거의 용탈되지 않는다. 인산의 용탈은 재배기간 동안 양이 아주 낮으며 규산의 용탈은 재배구에서는 6월이후 급격히 감소되었다. Na는 6월 중순에 가장 용탈량이 높고 그 이후는 서서히 감소되었다. 석회의 용탈량은 재배구가 무재배구보다 용탈량이 많으며 재배에 따라 용탈량이 감소되나 재배후기에도 비교적 높았다. Mg은 7월 중순 이후로 용탈량이 감소되나 재배후기에도 계속 용탈이 일어났다. 용탈수중의 EC는 6월 중순에 가장 높고 그 이후 감소되는 경향이며 석탄회 처리구의 EC가 대조구보다 높았다. 석탄회 처리로 침투수중의 용탈 성분은 크게 증가하지 않았으며 유연탄회와 무연탄회 사이의 차도 뚜렷하지 않았다. 석탄회 처리로 수도의 초기 신장과 분얼이 억제되었으나 후기에는 무효분얼의 억제효과가 기대된다. 석탄회 시용으로 토양의 pH가 상승되었으며 인산 성분이 축적되었다. 그러므로 산성토양의 교정효과는 기대되나 인산 시비의 문제가 있다고 판단된다. 따라서 석탄회 처리는 이식 직전에 시용하는 것보다는 전년도 수확후에 시용하여 우수에 의하여 용탈을 유도한 후라면 크게 염려를 하지에 않아도 좋을 것이며, 용출수에 함유된 무기성분의 양이 무처리와 큰 차를 보이지 않는 것으로 보아 석탄회의 토양시용은 수질오염에 꼭 영향을 주지 않을 것으로 판단된다.

• 농약과학회지
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• 제14권4호
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• pp.401-406
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• 2010

배 친환경재배시스템을 개발하기 위하여 배 재배에 있어서 경제적 손실이 가장 큰 검은별무늬병과 붉은별무늬병의 포자비산 요인 및 친환경 유기농자재를 이용한 방제 가능성을 검토하고자 시험한 결과는 다음과 같다. 배점은별무늬병원균 및 배붉별무늬병원균에 있어서 포자의 최초 비산은 온도와 관련이 깊으며, 최대비산은 습도의 영향이 큰 것으로 판단된다. 미생물제재인 Trichoderma harzianum-YC459과 황제품(80%)을 대상으로 배검은별무늬병에 대한 방제효과를 검정한 결과 발병율이 무처리 75.3%에 비해 화학농약인 hexaconazole 이 11.7%, 미생물제재가 29.3%와 황제품이 43.3%로 방제효과가 인정되었다. 관행 배 재배농가에서 농가관행 방제구와 비교하여 미생물제 및 황제품의 단독 및 교호로 추가 살포한 경우, 배검은별무늬병의 발병율은 다소 낮았으나 처리간 통계적 유의차는 나타나지 않았다. 유기배 재배농가에서 배검은별무늬병은 농가 관행방제구 10.3% 대비 황제품 추가 처리구에서는 7.8%의 발병율은 보여 유의한 방제효과를 보였으며, 배붉은별무늬병은 미생물제와 황 제품을 교호로 추가 살포한 처리구에서 4.3%의 낮은 발병율을 보여 농가 관행방제구 7.1% 대비 유의한 방제효과를 보였다.

• 한국환경과학회지
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• 제28권3호
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• pp.385-392
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• 2019

This study investigated the relationship among seven species of trichoderma through the identification of strains collected in Korea. The phylogenetic tree among the collected strains was classified into four groups. The trichoderma strains isolated in this way showed inhibitory effect on the fusarium wilt which is parasitic to cotyledon stem..The invisibility of J9, J10, J13 and J16 strains were higher in comparison with other strains in vitro test stand, and their spore production level was also higher. In the aluminum ring tests, it showed that the yield of the spores in J9, J10 and J13 were more than any other strain. As a result conducting the port test for cucumbers, the plant lengths of J13 were larger than the control plot, and the root lengths of all strains, except for J2 were longer than the control plot, and the root weights of J1, J9, J10, J13 and J16 were larger than the control plot. The disease severity for the fusarium wilt showed the smallest values at J13 and J16 in comparison with the control plot, and the control values of J13 and J16 were higher than other strains.