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강병화,심상인 한국환경농학회 1998 한국환경농학회지 Vol.17 No.1
우리나라 염해지의 식생 현황과 식물의 염분에 대한 내성 정도를 알아보기 위해 본 실험을 수행한 결과는 다음과 같다. 간척지를 비롯한 염해지의 주요 우점초종은 명아주과의 나문재, 칠면초, 해흥나물, 퉁퉁마디와 국화과의 갯개미취 등이었으며 탈염이 진행된 곳에는 부들, 갈대, 갯구러미풀 등의 화본과 식물이 우점하였다. 염해지의 우점 초종은 양액에 NaCl을 200mM로 첨가하여 실시한 사경재배에서도 강한 내염성을 나타내어 간척지의 식생과 이들의 내염성과는 일치성을 나타냈다. 내염성 식물인 명아주과의 나문재, 해흥나물, 가는갯는쟁이, 칠면초와 갯개미취 등이 내염성이 강한 식물종이었으며, 마디풀과의 개여뀌, 큰개여뀌, 털여뀌와 국화과의 별꽃아재비, 진득찰 등은 내염성이 매우 약한 종으로 나타났다. 갯벌 간척 후 탈염이 진행됨에 따라 초기에는 명아주과의 나문재, 해흥나물, 칠면조 등이 우점하고 이후에는 갯개미자리, 갯질경, 갯골풀, 갯꾸러미풀 등이 우점하게되고 이후에는 물대, 갈대 등이 우점하게될 것으로 추정되었다. This experiment was conducted to classify the plant species occurring in the saline reclaimed land by saline tolerance. The vegetation of reclaimed land was composed of various plant species from halophyte to glycophyte showing different saline tolerances. In the investigated saline region, reclaimed land of Youngjong island, Inchun city, 175 species belonging to 32 families were found. Our survey was carried out in two region, having different salinity due to different desalinization. The electricalconductivity (EC) of more saline region showed 48.0mS/㎝ and the other region showed 13.0mS/㎝. It is assumed that intensity of precipitation and runoff of rainfall may cause salinity gradient in the investigated region. The plant species occurred in the experimental region were classified as 72 species of annual, 42 species of biennial, and 61 species of perennial according to life cycle. For knowing relationship between vegetation of saline region and saline tolerance of occurring species, we tested the saline susceptibility of plant species collected at the saline regions. Testing plants were cultured by nutrient solution containing 200 mM NaCl, the critical concentration of survival in glycophytes. The saline tolerance was graded by the growing capacity in the sand-culture system. The more saline-tolerant species screened by sand culture were Atriplex gmelini, Suaeda asparagoides, Aster tripolium, Suaeda maritima, Salicornia herbacea, and Suaeda japonica. The most saline tolerant family was Chenopodiaceae. Poaceae, Cyperaceae, and Brassicaceae showed relatively high tolerance to saline stress. In the course of growth under the high saline condition, the most noticeable change was the darkening of leaves by increasing of chlorophyll content. The chlorophyll contents were increased with saline stress in most species.
강병화,심상인,마경호 한국환경농학회 2003 한국환경농학회지 Vol.22 No.1
휴경지의 식생 특성을 묵밭과 묵논과 같이 토양의 수분 상태가 다른 조건과 휴경 연차에 따라 조사하었다. 같은 묵논이라도 습한 상태로 휴경한 경우와 건조한 상태로 휴경한 경우 식생의 차이가 컸으며, 건조한 상태에서 다년생으로의 천이가 빠르게 일어났다. 천이 단계는 휴경 기간보다 휴경지의 토양 조건에 더욱 큰 영향을 받았다. 묵밭의 경우 휴경 2년차에 우점하였던 돌콩, 칡, 쑥, 새팥, 노랑물봉선 등은 휴경이 6년간 진전된 경우 칡, 억새, 돌콩, 쪽 등의 순으로 우점도가 변하였다. 논을 건답상태로 휴경한 경우 3년차에는 들깨풀, 돼지풀, 강아지풀 등이 주요 우점 초종이었으나 7년차에는 억새, 미국쑥부쟁이, 쇠치기풀 등이 우점하여 다년생으로 천이 되었다. 논을 습답 조건으로 휴경한 경우 수생 잡초가 우점하였다. 7년차에는 갈대, 돌콩, 부들, 고마리가 우점하였으나, 11년차에는 갈대, 줄, 고마리, 부들이 우점하는 초종이었다. 휴경지의 식물종 다양성은 건조한 토양 조건보다 다소 습한 조건의 토양에서 높게 나타났다. The present study was conducted to analyze the vegetational difference in fallowed fields at the different semi stages. Plant species were surveyed on the fields haviit different cropping history, soil moisture conditions, and the duration of set-aside. Effects of soil moisture condition and fallowing duration on the vegetational profiles of fallowed fields in the course of different send stages. In the fields fallowed for more than three years, a conspicuous feature of vegetations was the dominance of perennial species, which was less dominant in the fields fallowed for less than 3 years. The floristic composition of fallowed fields was dependent on the soil moisture condition. However, the influence of fallow history on vegetational composition was less than that of the soil moisture conditions. The dominant species occurred in fallowed upland (dry) fields were changed from Glycine NO, Persicaria thunhetgiana, and Artemisia princeps at 2-year-fallowed to Persicaria thunbergiana, Miscanthhus sinumsis, and Glycine sofa at 6-year-fallowed. In wet followed paddy fields, annual Mo sla pwnctulata, Ambrosia artenuisiifalia, and Setaria vifzdis, the dominant species at 3-year-fallowed, were substituted by perennial A iscanthus simnsis, Aster pilosus, and Hemarthria sibirica at 7-year-followed. When the succession continued for 11 years in wet fields, the vegetation was characterized by the domination of perennials such as Phragn tes com uanis, Tazania Walla, and Typha orientalis. It was suggested that the soil moisture condition was a strong determinant of the dominant species on early send conditions. In the fallowed paddy fields, the species diversity was relatively higher in the fields set-asided as wet condition compared to the fields followed as dry condition.