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가축분 퇴비 사용에 따른 밭 토양의 EC 및 질산태질소 함량 변화
황기성,호교순,김형득,최주호 한국환경농학회 2002 한국환경농학회지 Vol.21 No.3
본 연구는 가축분 퇴비시용에 따른 토양중 양분행동 양상을 구명하기 위하여 직경 30 ㎝ 높이 1 m의 PVC pot에 화산회 토양과 비화산회 토양을 충진하고 표토 20 ㎝ 깊이로 우분 부숙퇴비, 돈분 부숙퇴비 및 계분 부숙퇴비를 0, 50, 100, 150 ton/ha 해당량을 시용한 후 210일차에 토양을 분석하여 가축분 퇴비 처리에 따른 토양의 EC와 질산태질소 함량 및 유효인산의 변화를 조산한 결과는 다음과 같다. 1. 가축분 부수퇴비의 시용은 토양중 EC를 증가 시켰는데 계분 부숙퇴비는 시용량이 증가할수록 현저하게 증가하였다. 2. 가축분 퇴비의 시용에 따른 질산태질소의 함량 증가량은 계분 부숙퇴비는 시용량이 증가함에 따라 현저하게 증가한 반면 우분 부숙퇴비 및 돈분 부숙퇴비는 완만하게 증가하였다. 3. 유효인산의 함량변화는 화산회 토양의 경우 가축분 퇴비의 시용량이 증가하여도 인산 함량의 변화는 거의 없었으나 비화산회 밭 토양의 경우는 가축분 퇴비의 시용으로 증가함에 따라 현저하게 증가하였다. This study was conducted in Jeju Island to find the effects of livestock manure application on the changes in soil salt concentration and NO_3-N contents. Soil samples were collected from Goojua-Tong (volcanic ash soil) and Aewol-Tong(non-volcanic ash soil) to 50 cm depth and were mixed with livestock manure to 20 cm depth in PVC container(30 cm diameter, 1 m height). Animal manures of cattle, pig, and fowl were adjusted to 0, 50, 100, 150 ton/ha. Animal manure applications increased the salt concentrations in soil. The salt concentration was increased as the fowl manure amount was increased. The effects were larger in order of fowl manure > cattle manure ≒ pig manure. NO_3-N content in soil showed a sharp increase by applications of fowl manure, but the increase was slow when the cattle and pig manures were applied. In volcanic ash soil, there was no change in phosphate contents by application of animal manures, but the phosphate contents increased in non-volcanic ash soil with the application of animal manure, especially by fowl manure.
Hyoung Deug Kim,Ihnn Hye Choi,Sang Mi Lee 한국인간·식물·환경학회 2014 인간식물환경학회지 Vol.17 No.3
초등학교 수학교과시간에 원예활동을 도입한 원예-수학통합교육을 실시한 결과, 아동의 수학성적이 즉각적, 직접적으로 향상되지는 않았지만, 장기적 관점에서 아동이 수학에 흥미를 가지도록 도왔다. 원예-수학통합교육프로그램에 대한 선호도 조사에서, 아동은 수학 학습에 대한 재미가 증가하였고 과목에 더 관심을 가지게 된 원인이 되었다고 하였다. 본 연구를 통해서 볼 때, 원예-수학통합교육 프로그램은 초등학교 교육현장에서 적용 가능성이 매우 높으며 수학에 대한 흥미를 높이고 학교생활의 활력을 높이는데 매우 효과적이라고 판단된다. This study examined a 12-session horticulture-mathematics integrated education program from April 1, 2008 to July 15, 2008. The subjects were 60 elementary school students at 4th grade who are divided into an treatment group 30 students and a comparison group another 30 students. Both groups had no difference of interest in the mathematics at the beginning of the program. The study conducted a test of each mathematics unit for both the treatment group and comparison group after the program. The scores of the follow-up test reveal that the treatment group had increased interest in mathematics. The average score of the treatment group was 86.7 points, which was much higher than that of the comparison group, 66.5 points. The horticulture-mathematics integrated education program was found to improve the school children's interested in the mathematics. Based on the results of the follow-up test, 56.7% of the children show increased interest in the mathematics, and 30.0% show interest in the plants. Also, after the program, the children show improvement in their school lives. The education program was also found to help the children live more pleasantly in school. For instance, 66.7% of the children showed more interest in mathematics and 20% were more pleasant in school. The education program was also found to help parents pay attention to their children's school lives and learning.
Variation in Formaldehyde Removal Efficiency among Indoor Plant Species
Kim, Kwang Jin,Jeong, Myeong Il,Lee, Dong Woo,Song, Jeong Seob,Kim, Hyoung Deug,Yoo, Eun Ha,Jeong, Sun Jin,Han, Seung Won,Kays, Stanley J.,Lim, Young-Wook,Kim, Ho-Hyun American Society for Horticultural Science 2010 HortScience Vol.45 No.10
<P>The efficiency of volatile formaldehyde removal was assessed in 86 species of plants representing five general classes (ferns, woody foliage plants, herbaceous foliage plants, Korean native plants, and herbs). Phytoremediation potential was assessed by exposing the plants to gaseous formaldehyde (2.0 μL·L<SUP>−1</SUP>) in airtight chambers (1.0 m<SUP>3</SUP>) constructed of inert materials and measuring the rate of removal. <I>Osmunda japonica</I>, <I>Selaginella tamariscina</I>, <I>Davallia mariesii</I>, <I>Polypodium formosanum</I>, <I>Psidium guajava</I>, <I>Lavandula</I> spp., <I>Pteris dispar</I>, <I>Pteris multifida</I>, and <I>Pelargonium</I> spp. were the most effective species tested, removing more than 1.87 μg·m<SUP>−3</SUP>·cm<SUP>−2</SUP> over 5 h. Ferns had the highest formaldehyde removal efficiency of the classes of plants tested with <I>O. japonica</I> the most effective of the 86 species (i.e., 6.64 μg·m<SUP>−3</SUP>·cm<SUP>−2</SUP> leaf area over 5 h). The most effective species in individual classes were: ferns-<I>Osmunda japonica</I>, <I>Selaginella tamariscina</I>, and <I>Davallia mariesii</I>; woody foliage plants-<I>Psidium guajava</I>, <I>Rhapis excels</I>, and <I>Zamia pumila</I>; herbaceous foliage plants-<I>Chlorophytum bichetii</I>, <I>Dieffenbachia</I> ‘Marianne’, <I>Tillandsia cyanea</I>, and <I>Anthurium andraeanum</I>; Korean native plants-<I>Nandina domestica</I>; and herbs-<I>Lavandula</I> spp., <I>Pelargonium</I> spp., and <I>Rosmarinus officinalis</I>. The species were separated into three general groups based on their formaldehyde removal efficiency: excellent (greater than 1.2 μg·m<SUP>−3</SUP> formaldehyde per cm<SUP>2</SUP> of leaf area over 5 h), intermediate (1.2 or less to 0.6), and poor (less than 0.6). Species classified as excellent are considered viable phytoremediation candidates for homes and offices where volatile formaldehyde is a concern.</P>