• 생물환경조절학회지
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• 제12권4호
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• pp.195-199
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• 2003

계면활성제(SF316+FB0800)가 처리된 폴리에틸렌 필름 시설에서 직경 9cm 원안의 필름 표면에 부착된 수적량은 무처리구에서 1.21 mL, 1% 처리구에서 0.15mL, 2% 처리구에서 0.07 mL가 측정되었다. 그러나 육안으로는 1%와 2% 처리구 사이에 차이를 관찰하기가 어려웠다. 수적량은 하루 중 오전 10시에 가장 많았고, 기온의 상승된 오후 2시에 적었다. 무처리구에 비하여 계면활성제 1%와 2% 처리구 사이에 차이를 관찰하기가 어려웠다. 수적량은 하루 중 오전 10시에 가장 많았고, 기온이 상승된 오후 2시에 적었다. 무처리구에 비하여 계면활성제 1%와 2% 처리구에서 투광율은 각각 9.3%, 12.9% 높았다. 기온과 습도는 계면활성제가 처리된 비닐하우스와 머처리 비닐하우스 사이에 뚜렸한 차이를 나타내지 않았다. 오전의 기온은 계면활성제 처리 비닐하우스에서 1~2$^{\circ}C$ 정도 높았으며, 지온의 경우는 계면활성제 처리시설에서 3~4$^{\circ}C$ 정도 높은 경향을 나타냈다. 겨울철 상추의 생육은 계면활성제가 처리된 필름으로 피복된 비닐하우스에서 빨랐다. 그러나 계면활성제농도 1%와 2% 처리구 사이에는 뚜렸한 차이를 보이지 않았다.

• 생물환경조절학회지
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• 제10권4호
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• pp.213-218
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• 2001

2000년 말 현재 전국 시설 재배면적은 52,189 ha이고 이중 가온 재배면적은 13,621 ha이다. 난방비용이 경영비중 차지하는 비중이 시설재배의 선진국의 15%에 비하여 25~30%을 차지하고 있어 난방비의 비중이 높다. 이러한 문제점을 해결하고자 가온시 시설의 난방공간을 최소화 할 수 있는 장치를 개발하여 처리별 환경 및 작물의 생육상태 및 연료소비량을 조사하였다. 시설내 난방용적을 보면 관행커튼이 661.5m$^3$에 비하여 상하이동 수평커튼은 264m$^3$로 약 60%을 줄일 수 있다. 시설억제 재배에 있어서 처리별 연료 소비량은 관행에 비하여 상하이동 커튼 설치시 28%, 그리고 반촉성 재배시에는 56%의 연료 절감의 효과가 있었고 추가로 시설내 온도 분포와 상대습도가 균일하였다. 상하이동 커튼구가 관행에 비하여 고추의 개화시기가 빨랐고 수확량도 증가하였다.

• 한국토양비료학회지
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• 제47권1호
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• pp.8-15
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• 2014

In order to evaluating physiochemical properties of soil under minimum tillage and direct seeding cultivation on dry rice paddy, we conducted to analyze the soil physiochemical characteristics in treatment with 2-year minimum tillage and dry direct seeding (2MT), 3-year minimum tillage and dry direct seeding (3MT), and tillage transplanting cultivation (TT). As results of analyzing soil organic matter (OM) contents with 2 cm soil depth of interval from surface to 30 cm, OM contents with surface soil from 0 to 2MT and 3MT were higher than TT, recorded 34.6, 28.1 and $19.8gkg^{-1}$, respectively. But until 20cm in soil depth, it was not so large on the deviation of OM contents among the 3 treatments comparing with 2cm surface. Beneath 20 cm in soil depths, 2- and 3-year, OM contents in TT were distributed to be lower than 2MT and 3MT. The contents of total nitrogen in 2MT and 3MT were higher than the content in TT across the soil profile. Consequently, though minimum tillage and direct seeding farming is obviously the practice to saving of machinery work and labor, other practices such as continuously input OM should be needed to achieve carbon sequestration goal through minimum tillage and direct seeding on dry paddy.

• 한국환경농학회지
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• 제36권4호
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• pp.223-229
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• 2017

BACKGROUND: Tillage systems and fertilization play an important role in crop growth and soil improvement. This study was conducted to determine the effects of tillage and fertilization on the microbial biomass C and dehydrogenase activity of soils in a field under cultivation of soybean. METHODS AND RESULTS: An experimental plot, located in the temperate climate zone, was composed of two main sectors that were no-tillage (NT) and conventional tillage (CT), and they were subdivided into four plots, respectively, in accordance with types of fertilizers (non fertilizer, chemical fertilizer, hairy vetch, and liquid pig manure). Microbial biomass C and dehydrogenase activity were evaluated from May to July in 2016. The microbial biomass C and dehydrogenase activity of NT soils were significantly higher than those of CT in all fertilizer treatments, and they were further increased in hairy vetch treatment than the other fertilizer treatments in both NT and CT. The dehydrogenase activity was closely related to microbial biomass C. CONCLUSION: It is concluded that application of green manure combined with no-tillage can provide viable management practices for enhancing microbial properties of soil.

• 생물환경조절학회지
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• 제25권3호
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• pp.200-205
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• 2016

This study was conducted in order to investigate the effects that the difference of planting time by a method of cultivation in the non-heated greenhouse and the open field with spring planting had on growth and yield. With regard to the tested variety of Momordica charantia, variety 'Dragon' (Japan Yae 農藝) was selected. And 3 treatments on March 20, April 5 and April 20 for the greenhouse cultivation and 3 treatments on April 20, May 5 and May 20 for the open-field cultivation 1 month later than those for the greenhouse cultivation were planted by the randomized complete block design, and 4 secondary vines were trained. In the results of examining 15-day average atmospheric temperature after planting according to the methods of greenhouse and open-field cultivation and planting time, it was shown that there was a tendency for atmospheric temperature inside the greenhouse to decrease as the planting time was moved up. In particular, the average atmospheric temperature was $16.7^{\circ}C$ when seedling was planted on April 20 in the open-field cultivation, which was approximately equal to $17.0^{\circ}C$ of the average atmospheric temperature when a seedling was planted on March 20 in the greenhouse cultivation. With regard to the date of first harvest by the method of cultivation, it was shown that there was a tendency for the date of first harvest to be earlier in the greenhouse cultivation than in the open-field cultivation, and the date of first harvest was moved up as a seedling was planted earlier for the planting period. The number and weight of harvested fruits per plant showed a tendency which was almost similar to that of total number of harvest days and number of harvests. Thus, the number of fruits was 189 and the weight of fruits was 31,649g in case of the greenhouse cultivation and planting on March 20, which were maximum. In case of planting on the latest planting date : May 20 in the open-field cultivation, the number of fruits was 77 and the weight of fruits was 12,502g, which were at a level of 40% of those of planting on March 20 in the greenhouse cultivation 2 months earlier. The total yield per 10a was 10,228kg in the greenhouse cultivation and was 2.2 times as heavy as 4,607kg in the open-field cultivation with regard to the method of cultivation. For the planting period in the greenhouse cultivation, it was 10,539kg and 10,517kg in planting on March 20 and April 5, which was higher by 9% than 9,629kg in planting on April 20. And in the open-field cultivation, it was 4,785kg in planting on April 20 and 4,872kg in planting on May 5, which was higher by 15~17% than 4,163kg in planting on May 20. Taking the above results into account, it is considered proper to plant Momordica charantia from March 20 to April 5 for the greenhouse cultivation and from April 20 to May 5 or thereabouts when a risk of late frost is gone for the open-field cultivation in southern area.

• 한국잡초학회지
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• 제12권3호
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• pp.292-308
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• 1992

Recently agricultural situations are being placed in unfavourable socio-economic environment as followed by rapid decrease of rural population, poor labor quality and high wages of rural society due to high speedy industrialization of social structure in Korea. In addition to those circumstances, under the UR system to be expected in the early future, free trade of agricultural products will be faced inevitably in Korea. Practically prices of rice as a principle food in this country are expensive about three times compared to those of foreign rice markets, and so how to increase the international competitiveness and food supplies are important problems to be solved rapidly. Accordingly an urgent goal is reduction of agricultural production cost by the improvement of labour productivity as a labour saving and cost down cultivation methods as the direct seeding cultivation in rice. But there are many problems in the direct seeded rice cultivation. The important things to be improved in that cultivation are development of rice varieties with lodging tolerance, effective seedling stand, weed control, irrigation management and fertilizing and so on. Moreover agricultural basis as irrigation facilities, land consolidation and farm machineries must be improved for the stability of rice cultivation in the future.

• Preventive Nutrition and Food Science
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• 제8권4호
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• pp.336-342
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• 2003

The effects of cultivation methods (cultivation of curled-shaped type, M-1; conventional cultivation, M-2; growing after treatment with a growth regulator, M-3; cultivation by the combination of M-1 and treatment with oak charcoal, M-4) on the quality characteristics of soybean sprouts were studied by the measurement of growth characteristics. This study also investigated the changes in shelf-life stability of the new soybean sprouts (NSB) using M-4, which was cultivated with oak charcoal and treated with antimicrobial Citrus sunki seed extract. Among the soybean sprouts grown for six days at the high temperature and humidity environment (90$\pm$5% RH, 25$\pm$1$^{\circ}C$), M-1 revealed no significant difference in terms of quality, such as the harvest yield, the rot rate and the growth characteristics when compared with M-2. M-3 showed no significant difference in growth characteristics, of hardness, and sensory evaluation scores when compared with the soybean sprouts grown by conventional methods. NSB had a low number of total microorganisms and had a better appearance after five days of storage than did the control group (M-2). These findings demonstrate that chemical-free and clean soybean sprouts can be grown by combining oak charcoal and antimicrobial Citrus sunki seed extract, thereby meeting the consumer demand for safe, chemical free sprouts.

• 한국농공학회논문집
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• 제65권2호
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• pp.1-11
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• 2023

This study analyzed the impact of greenhouse cultivation area and groundwater level changes due to the water curtain cultivation in the greenhouse complexes. The groundwater observation data in the Miryang study area were used and classified into greenhouse and field cultivation areas to compare the groundwater impact of water curtain cultivation in the greenhouse complex. We identified the characteristics of the groundwater time series data by the terrain of the study area and selected the optimal model through time series analysis. We analyzed the time series data for each terrain's two representative groundwater observation wells. The Seasonal ARIMA model was chosen as the optimal model for riverside well, and for plain and mountain well, the ARIMA model and Seasonal ARIMA model were selected as the optimal model. A suitable prediction model is not limited to one model due to a change in a groundwater level fluctuation pattern caused by a surrounding environment change but may change over time. Therefore, it is necessary to periodically check and revise the optimal model rather than continuously applying one selected ARIMA model. Groundwater forecasting results through time series analysis can be used for sustainable groundwater resource management.

• 한국농공학회논문집
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• 제65권6호
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• pp.93-103
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• 2023

This study aimed to analyze the impact of water curtain cultivation in the greenhouse complexes on groundwater's electric conductivity and water temperature. The greenhouse complexes are mainly situated along rivers to secure water resources for water curtain cultivation. We classified the groundwater monitoring well into the greenhouse (riverside) and field cultivation areas (plain) to compare the groundwater impact of water curtain cultivation in the greenhouse complex. The groundwater observation network in Miryang, Gyeongsangnam-do, located downstream of the Nakdong River, was selected for the study area. As a result of analyzing the electric conductivity and water temperature, the following differences were found in the observed characteristics by region. 1) The electric conductivity and water temperature of the riverside area, where the permeability is high and close to rivers, showed a constant pattern of annual changes due to the influence of river flow and precipitation. 2) The flat land in general agricultural areas showed general characteristics of bedrock observation in the case of water temperature. Still, it seemed more affected by the surrounding well's water use and water quality. The electric conductivity did not show any particular trend and was influenced by the surrounding environment according to the location of each point.

• 생물환경조절학회지
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• 제16권1호
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• pp.67-71
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• 2007

파슬리의 재배시기별 MA 저장성을 비교하였는데, 먼저 수확 당시 파슬리의 품질을 보면 엽록소 함량은 여름재배, 비타민 C 함량은 가을재배에서 그리고 경도는 겨울재배에서 가장 높게 나타났다. 각각 가을, 겨울 여름에 재배한 파슬리를 0.04mm세라믹 필름으로 포장하여 0$0^{\circ}C$에서 저장한 결과 겨울재배 처리구가 84일간 저장이 가능하였고 다음으로 가을재배가 77일, 여름재배는 56일로 가장 짝은 저장기간을 보였다. 생체중 감소는 여름재배 처리구에서 가장 컸다. 포장내 이산화탄소와 에틸렌 농도는 가을과 겨울에 재배한 처리구는 낮았고 서로 유사한 경향을 보였으나 여름재배 처리구는 수확 당시 높은 포장열과 이로 인한 저장 중 높은 호흡으로 이보다 $2{\sim}3$배 높았다. 이러한 결과는 여름재배 처리구가 가을과 겨울에 재배한 처리구에 비해 경도, 엽록소, 비타민 C함량 등의 품질이 단기간 내에 현저히 감소를 초래하였다. 이상의 결과로 보면 수확시기별로 겨울에 수확한 파슬리의 저장성이 가장 우수하였고 파슬리 MA저장시 장기저장을 위해서는 수확직후 포장열 제거가 매우 중요하다는 것을 알 수 있었다.