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.