• 한국잠사곤충학회지
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• 제9권
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• pp.27-34
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• 1969

본시험은 G8과 Urea를 상엽에 복합처리하였을 때 상수의 발육 및 처리상엽을 결여한 잠아의 실용형질에 미치는 영향과 GB를 단일처리한 상엽을 결여하였을때 잠아의 실용형질을 구명하기 위하여 실시한 결과 다음과 같은 성과을 얻었다. 1. 상수 가. 춘잠기에는 GB+Urea를 복합처리한 것이 주당 엽중이 가장 무거웠으며 무처리구에 비하여 수엽량이 7％ 증수되 었다. 나. 추잠기에는 GB와 Urea를 각각 단일처리한 것과 GB＋Urea를 복합처리한 것이 무처리구보다 지조장, 엽장 및 엽폭이 컸으며 수량도 많았다. 그러나 GB을 단일처리한 것이 지조장 1.000m 당의 엽량이 가장 적었다. 다. 각처리별 상엽의 성분에 있어서는 GB과 Urea를 복합처리한 것이 GB+Urea를 복합처리한 것에 무처리구보다 수분과 조단백질이 약간 많았으나 건물과 탄수화물은 약간 적었다. 2. 춘잠기 잠아성장 가. 감잠비율에 있어서는 4,5령구 공히 GB+Urea 복합처리구가 높았고 화용비율은 4령구에서 다른 처리구 보다 적었다. 나. 기잠대 1 만두수잠량은 4,5령구 공히 복합처리구에 큰 차는 없었으나 GB단일처리구가 다른 처리구 보다 약산 많은 경향이었다. 다. 견증비율은 각처리구간에 유의차는 없었으나 4령구가 5령구에 비하여 약간 높았다. 3. 추잠기 잠아성장 가. 감잠비율은 무처리구와 Urea를 단일처리한것이 GB+Urea 복합처리한것과 GB를 단일처리한 것보다 낮았다. 나. 화용비율에 있어서는 Urea를 단일처리가 GB+Urea 복합처리한 것보다 높았으며 다른 처리간에는 유의차 가 없었다. 다. 대 4령구잠 1만두수견량은 Urea 처리구가 무처리구. GB+Urea 복합처리구, GB 단일처리구 보다 많았다. 라. 견증비율을 각처리간에 유의차가 없었다.

• 한국식품저장유통학회지
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• 제20권4호
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• pp.459-466
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• 2013

본 연구에서는 수도수, 전기분해수, 이산화염소수 처리에 의한 복분자 딸기의 저장온도 및 기간에 따른 품질 변화를 분석하였다. 복분자 딸기를 수도수, 전기분해수와 이산화염소수 농도별 10, 50, 100, 200 ppm으로 각각 30초 동안 침지를 한 후, 상온과 냉장 저장하여 시간에 따른 저장성 효과를 비교하였다. 또한, 외관 품질유지와 갈변저해효과를 탐색하였다. 또한, 복분자로부터 Bacillus cereus와 Micrococcus luteus의 위해미생물을 분리 동정하였다. 살균세척수를 처리한 후 저장 온도별 시간에 따른 미생물 총균수를 측정한 결과, 각 처리구의 미생물 살균력은 전기분해수와 이산화염소수가 수도수 처리보다 증가하였으며 이산화염소수는 고농도일수록 현저하게 증가하였다. 상온에서 저장하는 구보다 냉장 저장한 구에서의 미생물 억제효과가 뛰어났다. 복분자 딸기의 표면에 주사전자현미경으로 관찰한 결과, 전기분해수와 이산화염소수 처리구에서는 미생물이 생존하지 않았다. 효소활성을 측정한 결과, 수도수 처리구보다 살균세척수 처리구에서 함량이 낮아졌으며 시간이 지남에 따라 서서히 증가하였다. 총 폴리페놀 함량은 세척 방법 간 유사한 결과를 나타내었다. 저장일수가 증가할수록 감소하였고 전기분해수와 이산화염소수 처리구의 함량이 수도수 처리보다는 낮았다. 따라서, 복분자 딸기의 전기분해수와 이산화염소수 처리는 미생물 생육을 억제하면서 신선도를 유지하고 품질 유지 및 저장성 향상에 기여할 것으로 사료된다.

• 한국토양비료학회지
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• 제48권5호
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• pp.340-350
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• 2015

This experiment was carried out to find out the mitigation of greenhouse gases (GHGs) emission and changes of soil carbon contents in the cropland. In order to minimize the soil disturbance, this study was conducted without crop cultivation at the pots treated with different biomass. Different biomass was buried in the soil for 12 months. Decomposition rates of expander rice hull, pig manure compost and carbonized rice hull were 18%, 11~11.5% and 0.5~1.2%, respectively. It was appeared that carbonized rice hull was slightly decomposed. No difference was shown between chemical fertilizer treatment plot and non-application plot. It was appeared that soil carbon content in the non chemical fertilizer application plot was high when compared to its chemical fertilizer. Its content at soil depth of 20 cm more decreased than the upper layer of soil. Accumulative emission of $CO_2$ with different treatments of biomass was highest of 829.0~876.6 g $CO_2m^{-2}$ in the application plot of PMC (Pig Manure Compost) regardless of chemical fertilizer treatment during 16 months of experiment. However, the emission for expander rice hull treatment plot was lowest of 672.3~808.1 g $CO_2m^{-2}$. For application plot of the carbonized rice hull, it was shown that non chemical fertilizer plot, 304.1 mg $N_2Om^{-2}$, was higher than the chemical fertilizer treatment, 271.6 mg $N_2Om^{-2}$. Greenhouse gas emissions in the PMC treatment were highest of 0.94 ton $CO_2eqha^{-1}yr^{-1}$. However, it was estimated to be the lowest in the expander rice hull treatment.

• 한국농공학회논문집
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• 제46권4호
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• pp.13-21
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• 2004

The purpose of this study was to investigate tile effects of pending depth treatment on water balance in paddy fields. Field experiment was performed in an experimental farm in Taegu, southern part of Korea during the rice growing season In 2001, 2002 and 2003. Experimental plots were three 8m ${\times}$ 80m rectangular plots. Three pending depth treatments, very shallow, shallow, and deep were used. Daily values of water balance components were measured in the field. The irrigation amounts measured at the experimental plots showed that the very shallow and the shallow ponded plots required smaller amount than the deep ponded plot. The shallow ponded plot saved irrigation water about 17.7% compared with the traditional deep ponded plot in 2001 The very shallow ponded plot saved irrigation water about 25.7% compared with the traditional deep ponded Plot in 2002, The shallow ponded plot saved irrigation water about 18% compared with the deep ponded plot in 2003.

• 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.

• The Korean Journal of Ecology
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• 제20권1호
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• pp.43-49
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• 1997

Effects of addition of soil ameliorants on the growth and nutrient absorption of Zea mays, Miscanthus sinensis and Phytolacca americana were investigated. Acid soil from Yeocheon Industrial Complex were used for the control plot (AS). We made two treatment plots, acid soil + lime (AS + L) and acid soil + dolomite (AS+D). Ration of acid soil : soil ameliorants in freatment plot was 50 : 1(V:V). Acid soil and soil ameliorants were mixed thoroughly before use. Shoot length of corn in AS+L and AS+D was considerably increased by 141% and 137%, respectively, compared with that in AS. Pokeweed in AS+L and AS+D also increased by 183% and 152%, respectively, compared with that in AS. However, growth of Miscanthus sinensis showed slight difference between the control and the treatment plots. Biomass of corn and porkweed in the treatment plots were also greater than those in the control plots. During the growth experiment with corn, concentrations of Ca and Mg in soil were increased and A1 decreased with increased soil pH in the treatment plots. Amount of aluminum absorbed by corn in the control plot was greater than that in the treatment plots. In case of Miscanthus sinensis, however, aluminum absorption in the control plot was lower than those in the treatment plots.

• 한국유기농업학회지
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• 제15권4호
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• pp.437-452
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• 2007

친환경자재인 키토산과 목초액 처리가 가지 및 잎상추의 생육에 미치는 효과를 검토한 결과 다음과 같은 몇 가지 결론을 얻었다. 1. 키토산과 목초액 처리가 가지의 생육에 미치는 영향 1) 키토산과 목초액 처리 전 후 토양의 성분변화는 큰 차이는 없었으며, 총 미생물 수가 증가한 경향을 보였고, 미생물 종류 중에는 세균수가 많이 증가하였다. 그리고 방선균, 사상균 및 트리코데마수는 처리간 일정한 경향은 없었다. 2) 가지의 생육 및 수량은 대조구에 비해 키토산과 목초액 처리구에서 공히 유의하게 높았으며, 처리간에는 유의적인 차이는 없었다. 가지의 10a당 수량은 키토산과 목초액 처리구 공히 대조구에 비해 수량이 증가하였고, 처리 간에는 유의적인 차이는 없었다. 2. 키토산과 목초액 처리가 잎상추의 생육에 미치는 영향 1) 키토산과 목초액 처리 전 후 토양의 성분변화는 큰 차이는 없었으며, 미생물상에서는 총 미생물수가 증가하였고, 미생물 종류 중에는 세균수가 많이 증가하였다. 그 외 방선균, 사상균 및 트리코데마수는 처리간 일정한 경향은 없었다. 2) 잎상추의 생육은 대조구에 비해 키토산과 목초액 처리 공히 유의적인 차이가 인정되었으며, 처리간에는 유의적인 차이는 인정되지 않았다. 대체적으로 처리농도가 높을수록 생육이 양호한 것으로 나타났다.

• 한국환경농학회지
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• 제27권1호
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• pp.27-34
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• 2008

농어촌 등에서 소규모로 발생하는 하수를 자연정화공법 의한 인공습지에서 효과적으로 처리하기 위하여 소형 하수처리장치를 호기성조 및 혐기성조로 구분하여 시공한 다음, 최적 하수 부하량을 조사하기 위해 하수 부하량별 오염물질의 처리효율을 조사한 결과 호기-혐기 조합형 소형 하수처리장에서 전반적으로 하수 부하량이 증가함에 따라 오염물질의 처리효율이 점점 감소하는 경향으로 특히 하수부하량 300 $Lm^{-2}day^{-1}$ 이상에서 수처리효율의 감소폭이 약간 컸다. 따라서 본 소형 하수처리장에서 BOD, $COD_{Mn}$, 탁도, T-N 및 T-P를 안정적으로 처리하기 위한 최적 부하량은 300 $Lm^{-2}day^{-1}$ 이었고, 이 때의 방류수 중 BOD, $COD_{Mn}$, 탁도, T-N 및 T-P의 처리효율은 각각 99, 94, 99, 49 및 89%로 현행 방류수 수질기준을 만족하면서 안정적으로 처리되었다. 하지만 본 소형 하수처리장에서 방류수 중의 T-N 및 T-P 함량은 각각 $28.5{\sim}29.4$ 및 $0.9{\sim}2.1mgL^{-1}$ 정도로서 앞으로 질소와 인의 방류수 수질기준이 각각 20 및 2 $mgL^{-1}$로 강화됨에 따라 보다 안정적인 수처리를 위해서는 T-N 및 T-P 처리효율을 향상시켜야 할 것으로 판단된다. 이에 최적 하수 부하량하에서 질소와 인의 강화될 방류수 수질기준(질소 20 $mgL^{-1}$ 및 인 2 $mgL^{-1}$)을 만족시키면서 안정적인 하수처리를 위한 최적의 수처리 공정개선 방안을 조사하였다. 호기-혐기 조합형 소형 하수처리장에서 수처리 공정개선 중 질소 및 인의 처리효율 향상이 가능한 방안은 혐기성조의 깊이 및 여재 입경 변경과 여재에 굴패각을 혼합한 방법이었다. 혐기성조의 깊이 및 여재 입경 변경 조건 중 혐기성조 1.5 m 깊이에서 여재 A(유효입경 1.50 mm)를 사용한 경우 T-N 및 T-P의 처리효율을 각각 10 및 3% 향상시켰고, 여재에 굴패각 혼합한 경우 T-N 및 T-P의 처리효율을 각각 14 및 7% 향상시켰다. 또한 동일한 조의 체적하에서 혐기성조의 깊이를1.5 m로 깊게한 것은 혐기성조 깊이 1 m에 비해 부지면적을 약 33% 정도 감소시킬 수 있을 것으로 판단되며, 또한 굴패각을 사용한 것은 폐기물의 재활용면에서도 매우 효과적인 방안으로 사용될 수 있을 것으로 판단된다.

• 한국환경복원기술학회지
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• 제18권3호
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• pp.1-11
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• 2015

This research was conducted to compare the effect of soil amendment and loess on physial and chemical properties of dredged soil and primary height growth of Ulmus davidiana var. japonica. Three types of research plots: control plot (Dredged soil only), DC treatment plot (Dredged soil + soil amendment) and DCL treatment plot (Dredged soil + soil amendment + Loess) were set at Okgu research site in Saemanguem. 32 trees of U. davidiana var. japonica were planted in each plots after 14 months from the construction. Soil texture, pH, electrical conductivity (EC), organic matter (OM), total nitrogen (TN), available P, exchangeable cation ($K^+$, $Na^+$, $Mg^{2+}$, $Ca^{2+}$) and sodium chloride were measured after 3 years from the construction. Also, survival rate and height of U. davidiana var. japonica were measured 22 months after planting, and the correlation between height of trees and the physico-chemical properties of soil were analyzed. Even though pH in both DC and DCL treatment plots are lower than control plot, they are still alkaline (> pH 8). OM, TN and available P in both DC and DCL treatment were higher than the control. Particularly, the content of available P in both DC and DCL treatment plots are 1.4~5.1 times and 2.0~3.1 times higher than the control respectively. The concentration of exchangeable Mg in DCL treatment plot was 1.1~5.5 times higher than the control (p < .05). The survival rate of the species was the highest in DCL treatment plot (98%) followed by DC treatment plot and the control. The average height of the trees in both DC and DCL treatment plots is 1.1m while the control is 0.8m. OM, TN, available P, K+ were significantly related to the height of U. davidiana var. japonica(p < .01). The results indicate that soil amendment affects on soil physial and chemical properties of dredged soil and height growth of U. davidiana var. japonica.

• 한국조경학회지
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• 제18권4호
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• pp.7-16
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• 1991

This research investigated soil, plants, insects and birds in the Mongchon Earth Fort, establishing the 11 plots, according to planting treatment, in order to present management method for ecological stability of species in the ground covering plots. The results of analysizing the investigated data summarize as follows. 1. In the ground covering plots without upper layer, the density and coverage of middle and low layer in the natural plots were higher than those in the artificial plots. 2. In the ground covering plots without upper layer, the density and coverage of low layer were higher than those in the artificial, while the density and coverage of herb layer in the natural plots were lower. 3. Whether there was upper layer or not, the total species diversity and enenness of the ground covering community in the natural plot without artificial treatment and natural treatment plot were higher than those ground covering. 4. In the ground covering plots with upper layer, the species diversity of ground covering in the plots without artificial treatment is high, while the species diversity in the plots with natural treatment caused the secondary succession is higher than that of the natural plot. 5. In the ground covering plots without upper layer, the species diversity in the plots with artificial management was higher than that of natural plots, while the evenness in the plots with artificial management was lower. 6. In the ground covering plots with upper layer the species diversity of insect in the plot of natural state was higher than that of insect in the plots with artifical treatment. 7. Synthetically, in the area with upper layer the species diversity of the ground covering community in the natural plot was high, while in the area without upper layer, the species diversity of it in the plots with artificial treatment was high. The insect turned up frequently in the plots of high species diversity of the ground covering, so the bird did in the plots of high species diversity of the ground covering and insects.