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노희명,최효정,윤석인,박지석 한국원예학회 2018 Horticulture, Environment, and Biotechnology Vol.59 No.6
To test the hypothesis that humic acid (HA), anaerobically digested pig slurry fi ltrate (APS), and their combination woulddiff erently aff ect the chemical speciation and extractability of metals (cadmium, copper, and zinc) and their uptake by plants,we conducted a pot experiment using wormwood in two texturally contrasting soils (sandy loam and clay loam) collectedfrom a fi eld near an abandoned Cu mine. Four treatments were laid out: HA at 23.5 g kg −1 (HA), APS at 330 mL kg −1 (APS),HA at 23.5 g kg −1 and APS at 330 mL kg −1 (HA + APS), and a control. Each treatment aff ected the chemical speciationand mobility of the metals, and thereby resulting in variable patterns of plant biomass yield and metal uptake. The APSsupported plant growth by increasing nutrient availability. HA supported or hindered plant growth by impacting the soil’swater and nutrient retention capacity and aeration, in a soil texture-dependent manner, while consistently enhancing theimmobilization of heavy metals. Temporal increases in whole-plant dry matter yield and metal accumulation suggested thatthe plants were capable of metal hyperaccumulation. The results were discussed in terms of the mobility of metals and plantgrowth and corroborated by the 15 N recovery of soil- and plant-N pools under H and HS treatments. Therefore, for eff ectivephytoremediation of polluted soils, an appropriate combination of plant growth promoters (APS) and chelating agents (HA)should be predetermined at the site where chemical stabilization of pollutants is desired.
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노희명,최우정,이은주,윤석인,최영대 한국생태학회 2002 Journal of Ecology and Environment Vol.25 No.5
This study was conducted to examine the seasonal pattern of N and P uptake by reeds (Phragmites australis) planted in newly constructed Shihwa tidal freshwater marshes. Reed and soil samples were collected from the wetland periodically from June 2000 to May 2002. Reed samples were analyzed for dry weight and content of N and P Soil organic matter content and salinity were also determined. Dry matter content of reed increased during the growing season but decreased in the fall and winter. However, this seasonal pattern was not so evident in the second year. In particular, throughout the measurement period, dry matter content of reed was lowest at a site showing high soil salinity. Regression analyses between dry matter content of reed and soil EC(1:5) suggested that dry matter content per unit square meter would decrease by 1.5 kg with every 1 dS m/sup -1/ increase in soil EC(1:5). The amount of N and P assimilated by reed significantly decreased from the fall and was lowest in the spring. Net decrease in N content from reed during the fall and next spring was calculated as 34.5 and 24.6 g m/sup -2/ in the first and second years, respectively, while the corresponding P loss was 4.0 and 1.8 g m/sup -2/. Soil organic mailer content increased in the fall and winter, but decreased in the spring and summer. The results of this study suggested that the removal of N and P by reed would be considerable during the growing season but the nutrients taken up by reeds would return as detritus to the marshes in the fall and winter. Based on the results of the study, therefore, the harvest of the reed at the latter part of the growth would be recommended to prevent further water quality degradation. However, the long-term effects of reed harvest needs further study. 시화지구 인공습지에 식재된 정수식물인 갈대(Phragmites australis)의 관리 방안을 모색하기 위해 갈대에 의한 질소 및 인 흡수 제거 양상과 갈대 생장과 관련된 토양 특성을 조사하였다. 습지 조성 초기에 갈대의 생장은 토양 염농도에 의해 저해된 것으로 나타났으며, 토양 유기물 함량은 갈대 비생육기 동안 고사체의 집적에 의해 증가하였지만, 서서히 분해되어 감소한 것으로 조사되었다. 갈대의 건물중과 질소 및 인 흡수량은 생장기인 여름과 가을에는 증가하였지만, 비생육기인 가을에는 감소하였다. 따라서 생장기 동안 갈대의 흡수에 의해 상당한 양의 질소와 인이 제거되었지만, 비생장기 동안 갈대 고사체의 형태로 토양에 환원되어 미생물의 분해에 의해 영양염류가 재방출될 가능성이 높은 것으로 판단되었다. 본 연구 결과에 의하면 인공습지 조성의 목적인 수질 정화와 생태공원으로서의 기능을 위해서는 갈대를 생육기간 중에 수확하는 방안을 적극적으로 모색해야 될 필요성이 있다.
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노희명,Ro, Hee-Myong 한국토양비료학회 1999 한국토양비료학회지 Vol.32 No.4
This study measures the influence of grass cover on water use and shoot growth of apple trees growing under different soil water regimes in temperate climate conditions and evaluates monthly crop coefficients of such conditions during four months of the growing season in 1995. To do so, double pot lysimeter experiments of 3-year-old Fuji' apple (Males domestica Borkh.) trees under a transparent rain shield were designed and installed. Trees were triplicate under three soil water regimes: (A) drip-irrigation at -50 kPa of soil matric potential (IR50). (B) drip-irrigation at -80 kPa of soil matric potential (IR80), and (C) constant shallow water table at 0.45 m below the soil surface (WT45). In each treatment, two soil surface conditions were tested: the soil surface bare, and covered with turf grasses. Mean monthly water use increased with increasing soil matric potential for drip irrigation and was greatest in the WT45 treatment. Monthly crop coefficients increased linearly in time for drip-irrigated apple trees ($r^2$ values of $0.953^{***}$ for turf grass-covered system and of $0.862^{***}$ for bare surface system), while those obtained in the WT45 treatment fluctuated, Duncan's multiple range tests for shoot growth showed that grass-covered IR50 was most favorable to apple trees. while bare surface waterlogged situation was most adverse at least in part due to a lack of oxygen in the root zone. Mid-season leaf Kjeldahl-N was higher in drip-irrigated apple trees than in WT45 trees, while soil Kjeldahl-N was not different irrespective of treatments. 본 연구는 사과나무의 수분이용, 신초 생장 및 작물계수에 미치는 토양수분영역과 잔디 피복의 영향을 조사하였다. 이를 위해 비가림 시설하에 3년생 사과 '후지'/M. 26 (Malus domestica Borkh.)을 재식한 3반복 double pot-lysimeter 실험을 수행하였다: (A) 토양 매트릭 포텐셜 -50 kPa의 점적관수 (IR50), (B) 토양 매트릭 포텐셜 -80 kPa의 점적관수 (IR80), 및 (C) 지하 0.45 m의 정체 자유수면 (WT45), 각 처리에 나지와 잔디 피복의 두 가지 지표상태를 두었다. 평균 월별 수분이용은 IR50 처리에서 IR80 처리보다 컸으며, WT45 처리에서 가장 컸다. 점적관수 처리 사과나무의 월별 작물계수는 시간의 1차 함수로 증가하였으나 ($r^2=0.953^{***}$, 잔디 피복 $r^2=0.862^{***}$, 나지), WT45 처리 사과나무의 작물계수는 변동하였다. 신초생장은 잔디 피복 IR50 처리에서 가장 컸으며, 나지 WT45 처리에서 가장 작았다. 토양의 Kjeldahl 질소는 처리에 관계없이 동일하였으나 8월 10일 측정한 엽중 Kjeldahl 질소는 WT45 처리보다 점적관수 처리에서 높았다.
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노희명,윤석인,최우정 한국원예학회 2005 Horticulture, Environment, and Biotechnology Vol.46 No.2
To investigate the effects of elevated CO2 and temperature on plant biomass production and N uptake, Chinese cabbages (Brassica campestris cv. Jangmi) were grown at two rates of N (350 and 700 mgkg-1) under contrasting atmospheric CO2 (360 and 650 mmolmol-1) in combination with current ambient or elevated (ambient +5C) temperature for 70 days. Temperature, CO2, and N rate significantly affected dry-mass of Chinese cabbage. Elevated CO2 suppressed dry-mass accumulation of the plants receiving N at 350 mgkg-1 irrespective of temperature, but the degree of suppression was significantly reduced for the plants receiving N at 700 mgkg-1 only when coupled with elevated temperature. Temperature and CO2 significantly affected N content of Chinese cabbages, while N rate did not. Irrespective of temperature and CO2 levels, N uptake efficiency was reduced with increasing N rates. However, N uptake efficiency of the plants receiving high N rates grown at elevated-temperature regimes increased at elevated CO2 levels whereas that of their counterparts grown at ambient-temperature regimes decreased, suggesting that the N rate of 700 mgkg-1 would be insufficient to ensure optimum growth of Chinese cabbages under elevated temperature and CO2. Our results suggested that an alternative N fertilization for Chinese cabbages should be tested if a doubling of atmospheric CO2 level leads to elevated temperatures.
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