• 한국토양비료학회지
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• 제43권5호
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• pp.552-557
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• 2010

본 연구는 천연 zeolite 처리가 시설하우스 토양의 염류집적 경감에 미치는 효과를 구명하고자 수행하였다. 시험토양의 EC수준은 5.0 dS $m^{-1}$이었으며, 제올라이트 처리는 7수준 (0.5, 1, 2, 5, 10, 15, 20%) 3반복으로 수행하였다. 제올라이트 처리에 따른 토양 EC 하락은 혼합수준과 비슷한 경향이었다. 특히, 제올라이트가 20%를 혼합된 토양의 처리 10일 후 EC수준은 5.01 dS $m^{-1}$에서 2.8dS $m^{-1}$ 수준으로 급격히 감소되었다. 토양 pH에 대한 제올라이트 효과는 미미한 수준에서 혼합비율과 같은 경향을 나타냈으며, 수용성 칼슘과 마그네슘 그리고 유효인산 농도는 크게 감소하였다. 따라서 관수제염과 그 밖에 방법 등을 통하여 제염효과를 기대하기 어려웠던 치환성 양이온과 인산의 효과적인 제염제로서 천연 zeolite의 적용이 가능할 것으로 기대한다.

• 한국토양비료학회지
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• 제48권3호
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• pp.218-224
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• 2015

Zeolite may help crop growth, yield increase, and salt removal. Field experiment under greenhouse cultivation was conducted to study the effect of zeolite application on growth and yield of Chinese cabbage (Brassica campestris L.) and soil. Soil was classified as Gyuam series (coarse silty, mixed, nonacid, mesic family of Aquic Fluvaquentic Eutrudepts). Six zeolite rates were 0, 3, 5, 10, 20 and $40Mg\;ha^{-1}$. Experimental design was a completely randomized design. Chinese cabbage was grown three times consecutively. Established plant number of plant and yield as fresh weight (F.W.) were measured and soil samples were taken before and after harvesting. Chinese cabbage yield was $76.9Mg\;ha^{-1}$ at a rate of $20Mg\;zeolite\;ha^{-1}$, $54.3Mg\;ha^{-1}$ at a rate of $5Mg\;zeolite\;ha^{-1}$, and $51.3Mg\;ha^{-1}$ at control (no zeolite), respectively. Second order regression analysis using zeolite rate and yield showed that optimum zeolite application rate was between 24 and $26Mg\;ha^{-1}$. The regression equation explained about 88% of the yield variability. The electrical conductivity (EC) decreased from 3.2 to $1.0dS\;m^{-1}$ for all treatments so that salt accumulation was not a concern. Based on the results, we recommend that optimum zeolite application rate is between 20 and $24Mg\;ha^{-1}$ for Chinese cabbage under greenhouse cultivation.

• 한국농공학회논문집
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• 제55권2호
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• pp.65-75
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• 2013

In this study, the engineering characteristics of volcanic ash-cement soil mixtures and zeolite-cement soil mixtures are investigated by using unconfined compression test, freezing-thawing test, SEM and XRD analysis. The samples were mixed with volcanic ash from Mt. Baekdusan or porous zeolite, and cement as the ratios of 3.5:1, 4.0:1, 4.5:1, 5.0:1 with and without metakaolin. It is confirmed that compressive strength degraded with increasing of the amount of volcanic ash or zeolite, and increased with addition of metakaolin as a binder. Moreover, test results suggested that the mixtures provided sufficient freezing-thawing resistance. In addition, ettringite as a product of cement hydration was detected by SEM and XRD, and that possibly contributes to the strength of the mixtures.

• 한국토양비료학회지
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• 제48권1호
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• pp.44-49
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• 2015

Urea has been the most useful N-source, due to lower cost per unit of N. But nitrogen use efficiency of urea may be reduced because of losses from agricultural system by volatilization of ammonia to atmosphere. This study was conducted to evaluate the nitrogen efficiency and growth of hot pepper (Capsicum annuum L.) by mixed treatment with nitrogen and zeolite. They were treated with N $161kg\;ha^{-1}$, N $230kg\;ha^{-1}$, nitrogenzeolite mixture (NZM) $161kg\;ha^{-1}$, NZM $230kg\;ha^{-1}$ and N $0kg\;ha^{-1}$, respectively. In the soil chemical properties after experiment, soil pH decreased but available $P_2O_5$, EC and total nitrogen increased in nitrogen-zeolite mixture treatment. $NO_3-N$ content in the soil showed the highest level in NZM $230kg\;ha^{-1}$. NZM $161kg\;ha^{-1}$ treatment increased growth and yield of hot pepper compared to urea alone. Nitrogen utilization efficiency of hot pepper plant was 47.15% at the treatment of NZM $161kg\;ha^{-1}$, while 36.74% at N $230kg\;ha^{-1}$. These results showed that application of mixture of nitrogen and zeolite had positive influence to improve the efficiency of nitrogen utilization and increase of red pepper yield.

• 아시안잔디학회지
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• 제24권2호
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• pp.205-210
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• 2010

본 연구는 코스조성에 주로 사용되는 4종의 토양개량제의 혼합비율에 따른 모래상토의 물리화학적 특성변화를 조사한 결과이다. 토양개량제의 혼합비율에 따라 상토의 물리화학성을 조사한 결과 peat, humate, peatmoss 및 zeolite는 pH와 CEC에서 고도의 상관성(P<0.01)을 나타내어 토양개량제의 특성에 따라 상토의 토양화학성에 영향을 주었다. 상토의 토양물리성 결과를 통해 USGA 기준으로 평가할 때, 최적의 혼합비율은 토양개량제 peat, humate 및 peatmoss는 각각 5%, 3%, 7%이고, zeolite에서는 적합한 비율을 찾을 수 없었다. 각 토양개량제들의 혼합에 따른 토양물리성 변화에서 가장 중요한 요인은 비모세관공극으로 총공극과 수리전도도의 변화에 영향을 미쳤다. 토양개량제의 혼합비율에 따른 토양개선효과를 비교할 때, peat와 peatmoss는 토양 모세관공극 및 수리전도도에서, humate는 수리전도도에서, zeolite는 비모세관공극과 총공극에서 고도의 상관성을 나타내었다(P<0.05). 이들 결과를 통해 골프코스의 상토조성에 사용되는 토양개량제의 종류와 특성 및 혼합비율이 USGA 상토의 근권층 개량과 토양 이 화학성에 영향을 미치고 있음을 알 수 있었다.

• 한국토양비료학회지
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• 제47권5호
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• pp.368-373
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• 2014

Ammonia loss from urea significantly hinders efficient use of urea in agriculture. The level of nitrous oxide ($N_2O$) a long-lived greenhouse gas in atmosphere has increased mainly due to anthropogenic source, especially application of nitrogen fertilizers. There are reports in the literature showing that the addition of zeolite to N sources can improve the nitrogen use efficiency. This study was conducted to evaluate nitrous oxide ($N_2O$) and ammonia ($NH_3$) emission by mixed treatment of urea and zeolite in upland crop field. Urea fertilizer and zeolite were applied at different rates to study their effect on $N_2O$ emission during red pepper cultivation in upland soils. The $N_2O$ gas was collected by static closed chamber method and measured by gas chromatography. Ammonia concentration was analyzed by closed-dynamic air flow system method. The total $N_2O$ flux increased in proportion to the level of N application. Emission of $N_2O$ from the field increased from the plots applied with urea-zeolite mixture compared to urea alone. But urea-zeolite mixture treatment reduced about 30% of $NH_3$-N volatilization amounts. These results showed that the application of urea and zeolite mixture had a positive influence on reduction of $NH_3$ volatilization, but led to the increase in $N_2O$ emission in upland soils.

• 한국토양비료학회지
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• 제17권4호
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• pp.381-388
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• 1984

객토원(客土源)을 구(求)하기 어려운 평야지(平野地) 사질답(砂質畓)의 토양개량제(土壤改良劑)로서 객토대체자원(客土代替資源)으로 Zeolite 시용(施用)의 가능성(可能性)을 검토(檢討)하기 위하여 포장시험(圃場試驗)과 실내시험(室內試驗) 결과(結果)를 요약(要約)하면 다음과 같다. 1. 점토함량(粘土含量) 16%인 토양(土壤)에 규산(珪酸)을 적량시용(適量施用)하고 질소(窒素)를 흡착(吸着)시킨 Zeolite 시용(施用)은 벼 생육(生育) 및 수량(收量)에 있어 객토(客土) 40M/T/10a 시용(施用)과 동등(同等)한 효과(效果)가 인정(認定)되었다. 2. 최고수량(最高收量)을 낸 질소시용량(窒素施用量)은 무개량구(無改良區), 객토(客土), Zeolite구(區)에서 각각(各各) 15.0, 18.2, 18.1kg/10a 이었다. 3. 객토구(客土區)와 Zeolite구(區)에서 수확기(收穫期) 질소(窒素) 및 $SiO_2$, 흡수량(吸收量)이 무개량구(無改良區)에 비(比)해 현저(顯著)히 많았다. 4. 토양(土壤), 객토원(客土源) 및 Zeolite의 암모늄 흡착양상(吸着樣相)은 Langmuir 등(等) 온흡착식(溫吸着式)을 따랐고 암모늄 최대흡착(最大吸着)은 각각(各各) 16.7, 20.5, 890mg/10a이었다.

• 한국토양비료학회지
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• 제49권6호
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• pp.807-812
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• 2016

Soil amendment, especially addition of clay minerals, has been widely conducted to improve the physical and chemical properties of cultivated soils. However, there are no systematic studies on the effects of the structural type of clay minerals added. This study was conducted to investigate the effects of structural type of clay minerals on physical properties of soils. Two experimental soils, layer-dominant and granule-dominant ones, were mixed with either a layer-type smectite or a granule-type zeolite at a level of 2.0 wt%. It was observed that water permeability of soils was decreased by smectite whereas not significantly changed by zeolite. This effect was much greater in layered clay-dominant soil than in granular clay-dominant soil. Our results clearly indicated that the relationship of structural type between a soil and an amendment plays a decisive role in the soil properties. Therefore, it is highly recommended that the structural types of both soil and amendment be taken into consideration for soil amendment by clay minerals.

• 상하수도학회지
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• 제24권4호
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• pp.453-462
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• 2010

Nowadays, the challenges of ensuring good water quality and quantity of river are becoming more important for human society, but there has been troublesome for purifying river water. In this study, we performed the fundamental study of a river water treatment system using riverside soil and eco-friendly optimal media for improving river water quality and can also treat a large amount of river water. As the results of the physical and chemical characterization of the two different soils (Kyungan and Chungrang, The Republic of Korea), which were collected from real stream sides in the Han River basin, and five kinds of media (zeolite, perlite, steel slag, woodchip and mulch), both soils were all classified as a sand, and effective size ($D_{10}$) and uniformity coefficient (U) of the soil were about 0.2 mm and 4 or so, respectively. Through the batch and column experiments with the soil and eco-friendly media, zeolite and mulch were found to be efficient for decreasing nitrogen. In addition, steel slag was especially superior to the other media for phosphorus removal. From soil reforming tests volume ratios were 2.8, 1, and 1 of Kyungan soil, zeolite, and steel slag hydraulic conductivity of mixed soil was increased $1.30{\times}10^{-2}$ from $2.85{\times}10^{-3}$ of Kyungan soil, and the removal efficiencies of nitrogen and phosphorus were also improved. These results show that reforming of the soil enhanced the purification of a large amount of water, and zeolite, mulch, and steel slag might be facilitated as proper functional media.

• 유기물자원화
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• 제10권2호
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• pp.71-81
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• 2002

본 연구는 phyllite의 수도 육묘용 상토개발을 위해 수행되었다. 먼저 phyllite의 물리화학적인 조사를 통하여 phyllite의 농업적 이용성을 평가하기 위해 수행한 실험 결과, Phyllite 용적비중은 각각 $1.31g/cm^3$이며, 결정 입자들 사이에는 전체의 65% 공극을 가지며, 이러한 성질에 의해 수분을 흡수할 수 있는 표면적이 넓어지므로 수분보유력은 43%(1/3bar)이다. 수도 육묘 상토 개발을 위해 phyllite에 zeolite와 hill soil 각각을 100%, 70%, 50%와 30%로 혼합하고, 질소 시비량(0, 1, 2g/box)을 달리한 육묘 시험에서 벼의 육묘 초기에 phyllite를 zeolite와 혼합할 경우 phyllite 함량이 증가할수록 초장 및 묘 충실도의 증가에 영향을 주며 뿌리의 생육에는 영향을 주지 않았다. 그러나 hill soil과 혼합할 경우, phyllite 함량이 증가할수록 발근율을 증가시키며 초장의 생장에는 영향을 주지 않았다. 단, 벼의 생육에 있어서 육묘 일수가 길어질수록 질소질 비료의 시비는 벼의 생육을 촉진시켰다. 따라서 phyllite는 현재 육묘 상토자재들과 비교하여 양호한 결과를 나타내었으며 앞으로도 좀 더 다양한 농업적 자재로서의 활용연구가 이루어져야 할 것이다.