Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Floristic Composition of Plant Community in Set-Aside Fields with Regard to Seral Stages

휴경 연차에 따른 휴경지 군락내 식생 특성

  • Kang, Byeung-Hoa (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Ma, Kyung-Ho (National Institute of Agricultural Biotechnology) ;
  • Shim, Sang-In (Division of Plant Resources and Environment, College of Agriculture, Gyeongsang National University)
  • 강병화 (고려대학교 생명환경과학대학 환경생태공학부) ;
  • 마경호 (농촌진흥청 농업생명공학원) ;
  • 심상인 (경상대학교 농과대학 식물자원환경학부)
  • Published : 2003.03.31
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Abstract

The present study was conducted to analyze the vegetational difference in fellowed fields at the different seral stages. Plant species were surveyed on the fields having different cropping history, soil moisture conditions, and the duration of set-aside. Effects of soil moisture condition and fellowing duration on the vegetational profiles of fellowed fields in the course of different seral stages. In the fields fellowed for more than three years, a conspicuous feature of vegetation was the dominance of perennial species, which was less dominant in the fields fellowed for less than 3 years. The floristic composition of fellowed 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 fellowed upland (dry) fields were changed from Glycine soja, Persicaria thunbergiana, and Artemisia princeps at 2-year-fellowed to Persicaria thunbergiana, Miscanthus sinensis, and Glycine soja at 6-year-fellowed. In wet fellowed paddy fields, annual Mosla punctulata, Ambrosia artemisiifolia, and Setaria viridis, the dominant species at 3-year-fellowed, were substituted by perennial Miscanthus sinensis, Aster pilosus, and Hemarthria sibirica at 7-year-fellowed. When the succession continued for 11 years in wet fields, the vegetation was characterized by the domination of perennials such as Phragmites communis, Zizania latifolia, and Typha orientalis. It was suggested that the soil moisture condition was a strong determinant of the dominant species on early seral conditions. In the fellowed paddy fields, the species diversity was relatively higher in the fields set-asided as wet condition compared to the fields fellowed as dry condition.

휴경지의 식생 특성을 묵밭과 묵논과 같이 토양의 수분상태가 다른 조건과 휴경 연차에 따라 조사하였다. 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, 쑥 등의 순으로 우점도가 변하였다. 논을 건답상태로 휴경한 경우 3년차에는 들깨풀, 돼지풀i 강아지풀 등이 주요 우점 초종이었으나 7년차에는 억새, 미국쑥부쟁이, 쇠치기풀 등이 우점하여 다년생으로 천이되었다. 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.

Keywords

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