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새만금 간척지에서 염농도에 따른 갈대(Phragmites australis) 유묘 생장 및 분해 특성
오양열,김선,류진희,이수환,이정태,배희수,김영주,김길용,Oh, Yang-Yeol,Kim, Sun,Ryu, Jin-Hee,Lee, Su-Hwan,Lee, Jung-Tae,Bae, Hui-Su,Kim, Young-Joo,Kim, Kil-Young 한국환경과학회 2019 한국환경과학회지 Vol.28 No.12
Common reed (Phragmites australis) is widespread in reclaimed land and wetland habitats. Every year, the common reed produces extensive colonies by means of underground rhizomes and ground-surface stolons. From an agricultural point of view, the common reed's large biomass is a good material for supplying organic matter. However, it has not yet been studied in terms of seedling production, transplanting conditions, and decomposition characteristics in reclaimed land. Seeds were harvested from the native common reed in Saemangeum, South Korea, the previous year and stored on an open field. The seeds were sowed in the greenhouse at the beginning of April. Common reed decomposition was studied from June to September, with the use of coarse mesh (5 mm) stem litterbags, on three samping dates and with five replicate packs per sample. These packs were dug in five soil condition (low-salinity topsoil, subsoil, high-salinity topsoil, subsoil, paddy topsoil) to 0.2 m and 0.4 m depth. The highest germination rate of common reed seeds was observed in non-salt solution, but the exhibited germination rate was 70% at 9.38 dS m<sup>-1</sup>. The plant height of young reed decreased steadily with increasing salinity, but leaf number did not decrease by 9.38 dS m<sup>-1</sup>. The survival rate of the two-year-old reed was 83.3%, which was 35% higher than that of the one-year reed. The transplant success rate was 0% in the no vinyl mulching in the soil, but the first year and second year seedlings survived rates were 63% and 83.3%, respectively, in vinyl mulching. Common reed decomposition rates were faster low salinity than high salinity. All nutrient contents were found to fluctuate significantly with time by soil conditions. We also need to study the growth rate of reed transplanting seedlings by soil moisture contents and the comparison of degradation in common reed tissues.
신간척지 벼 재배 농지의 답전윤환에 따른 토양 특성 및 작물 생산성 변화
오양열 ( Yang-yeol Oh ),김영주 ( Young-joo Kim ),이수환 ( Su-hwan Lee ),류진희 ( Jin-hee Ryu ),김선 ( Sun Kim ),이정태 ( Jung-tae Lee ),전재범 ( Jae-beum Jun ),김길용 ( Kil-young Kim ) 한국환경과학회 2018 한국환경과학회지 Vol.27 No.8
Paddy-upland rotation system is one of the important cropping system for improving soil quality and crop productivity. we conducted to investigate the effect of paddy-upland rotation system on soil properties and crop productivity in reclaimed tidal land. The paddy-upland rotation could be effective to conserve soil water contents and prevent from salt damage when cultivating upland crops. The first two years of maize cultivation after rice cultivation could be effective to secure stable production. However, in case of soybean crop, the rotation effect might be lower than that of maize. In the first year, the yield of soybean was 214 kg/10a. In the second and third year, the yields of soybean decreased consecutively to 152, 123 kg/10a respectively. In this paper, it would be suggested that maize be cultivated for up to two years and soybean be cultivated for one year after rice crop grown in reclaimed tidal land. This study could be provide basic data of the physico-chemical properties applicable to paddy-upland rotation system at reclaimed tidal lands.
새만금 간척지와 일반밭 토양에서 뚱딴지(Helianthus tuberosus L.) 재배시 생육 및 이눌린 평가
오양열 ( Yang-yeol Oh ),김승연 ( Seung-yeon Kim ),이광식 ( Kwang-sik Lee ),류진희 ( Jin-hee Ryu ),이수환 ( Su-hwan Lee ),옥희경 ( Hee-kyoung Ock ),정강호 ( Kang-ho Jung ),강방훈 ( Bang-hun Kang ),김길용 ( Kil-yong Kim ) 한국환경농학회 2020 한국환경농학회지 Vol.39 No.3
BACKGROUND: In order to cultivate upland crops in reclaimed land, economically appropriate crops should be selected. Jerusalem artichoke (Helianthus tuberosus L.) is one of the primary sources for inulin in higher plants. The objective of this study was to evaluate and compare growth and inulin of H. tuberosus L. according to the cultivation region in Korea. METHODS AND RESULTS: 21 varieties of H. tuberosus L. were collected in Korea, and then 7 varieties of H. tuberosus L. were selected for this study. To compare growth and inulin, those varieties were cultivated in reclaimed land and upland soils. The growth of H. tuberosus L. significantly decreased when cultivated in reclaimed land. There was an increas at 17.8% in the content of white H. tuberosus L. tuber inulin in reclaimed land. CONCLUSION: The content of inulin in H. tuberosus L. tubers was found to be dependent on cultivation region and tuber color. There was a difference of the inulin content between the tubers with different colors in reclaimed land. Purple tubers of P20 were considered suitable varieties for cultivation in reclaimed land. White tubers of W1 and W8 were also considered suitable varieties for cultivation in reclaimed land.
새만금간척지에서 뚱딴지(Helianthus tuberosus L.) 재배시 염류 특성 변화 및 적정 자원 선발
오양열 ( Yang-yeol Oh ),이정태 ( Jung-tae Lee ),홍하철 ( Ha-cheol Hong ),김재현 ( Jae-hyun Kim ),서우덕 ( Woo-duck Seo ),김선 ( Sun Kim ),류진희 ( Jin-hee Ryu ),이수환 ( Su-hwan Lee ),김영주 ( Young-joo Kim ) 한국환경농학회 2018 한국환경농학회지 Vol.37 No.2
BACKGROUND: Soil salinity of reclaimed tidal land in Korea is highly important factor. High salinity is harmful to crop productivity. Jerusalem artichoke (Helianthus tuberosus L.) is known to be salt-tolerant and has high adaptability to diverse pedo-climatic conditions. The objective of this study was to assess the changes of soil properties and crop productivity according to salt concentration in the reclaimed tidal lands. METHODS AND RESULTS: Experimental sites were selected at Saemangeum (35°46’N, 126°37’E) reclaimed tidal land, and their dominant soil series were Munpo (coarse loamy, mixed, non-acid, mesic, typic Fluvaquents). H. tuberosus L were collected from 12 locations across Korea. Tubers were planted at 75×25 cm with EC 2 to 7 dS m<sup>-1</sup>. Soil samples were periodically collected from both 0~20 cm and 20~40 cm depths of each site. Soil salinity and soil moisture contents were varied depending on weather conditions. Soil electrical conductivity varied from 1.0 to 5.9 dS m<sup>-1</sup>, and soil moisture contents varied from 9.2 to 28.7%. The white-colored tubers of H. tuberosus L. collected from `Yeongwol-gun’exhibited the highest height (207 cm), followed by the white-colored tubers of H. tuberosus L. collected from‘Iksan-si’(202 cm). The white-colored tubers of H. tuberosus L. collected from ‘GyeongJu-si’showed the highest yield (549 kg/10a). The purple-colored tubers of H. tuberosus L. collected from ‘Yeongwol-gun’showed the highest yield (615 kg/10a). CONCLUSION: Our results indicate that the plant height and tuber yield did not appear to be correlated. Considering yield and inulin content, the GyeongJu-si seemed to be suitable as the white-colored tubers of H. tuberosus L. and the Yeongwol-gun seemed to be suitable as the purplecolored tubers of H. tuberosus L. in the reclaimed tidal lands. However, it is necessary to consider the relationship between the inulin content and the yield.
자귀풀(Aeschynomene Indica L.) 종자의 휴면타파 처리가 발아에 미치는 영향
오양열 ( Yang-yeol Oh ),이수환 ( Su-hwan Lee ),김영주 ( Young-joo Kim ),정진태 ( Jin-tae Jeong ),류진희 ( Jin-hee Ryu ),김선 ( Sun-kim ),정진 ( Jin-jung ),배희수 ( Hui-su Bae ),이상훈 ( Sang-hun Lee ),김영두 ( Young-doo Kim ),홍하 한국국제농업개발학회 2015 韓國國際農業開發學會誌 Vol.27 No.5
간척지에서 자생하는 자귀풀은 콩과잡초로서 휴먼성이 강하고 종피가 딱딱한 껍질에 싸여있어 채종한 종자는 발아율이 저조하므로 발아율을 높이기 위하여 황산, 온도 및 모래를 을 이용한 종피파상 방법을 이용한 휴면타파 효과를 구명하기 위하여 본 시험을 수행하여 그 결과는 다음과 같다. 1. 2013년도 간척지에서 채종한 자귀풀 발아세와 발아율은 18.0%와 27.0%, 2014년 채종 종자는 15.8%와 21.5%을 보였다. 2. 자귀풀 종자의 황산처리효과는 황산용액 50% 처리에서는 무 처리와 큰 차이를 보이지 않았지만, 황산용액 100% 처리에서는 채종 연도와 관계없이 71.0% ~ 73.0%의 발아율을 나타내었다. 3. 온도처리 효과는 90oC 고온 상태에서 각각 20, 30, 40분처리시의 발아율은 처리시간 40분에서 90% 이상의 높은 발아율을 보여 처리시간이 길어질수록 발아율은 증가할 것으로 사료된다. 4. 모래를 이용한 종피파상 처리는 2014년 채종한 종자는 종자량과 모래의 비율이 4배 처리에서 94.0%로 가장 높은 발아율을 보였고, 2배 처리에서도 80%의 발아율을 나타내었다.이상의 결과를 종합하면 간척지에서 채종한 자귀풀의 휴면타파는 많은 노력이나 시설 및 비용이 추가되는 온도처리나 황산처리보다 주변에서 쉽게 구할 수 있는 모래를 이용한 종피파상법이 좋을 것으로 사료된다. Saemangeum reclaimed tidal land has a variety native plants and a vegetation species. Using of growing plants on reclaimed tidal land have being studied actively to improve soil fertility. This study was conducted to increase the germination rate of indian jointvetch (Aeschynomene Indica L.). seeds were kept to soak in sulfuric acid solution of 50%, and 100% conc. for 10 min. and also temperature condition test was carried with tem. of 90oC and treatment times 20, 30, 40 min. in dry oven(DS-80-3). Scarification test of mixed ratio with seed and sand was done such as 1 (seed) : 2 (sand), 1 : 4, and, 1 : 6 for scratch into surface of seed. seed and sand ratio of 1 : 4 in the germination rate was the higher by 94% than others. Germination rate of temperature condition showed much more 90% at 90oC, and for 40min treatment. Germination rates in sulfuric acid solution of 50% conc. and for 10 min. showed at 26% in 2013, and 21% in 2014. As the result, Indian jointvetch (Aeschynomene Indica L.). seeds collected in the reclaimed land could improve the germination rate using sand around reclaimed land.