Changes of Soil and Water Temperature Upon Growth Status of Algae and Weed in Submerged Paddy Soil During Rice Plant Growth

조류(藻類) 및 잡초류(雜草類) 서식형태별(棲息形態別) 담수토양(湛水土壤)의 온도변화 양상(樣相) 연구(硏究)

A pot (1/200a) experiment was conducted to find out the changes of soil and water temperature on the several paddy soil weeds (Duck weed, Algae and Floatin fern) growing condition. The results obtained were shown as follows; 1. Diurnal maximum soil and water temperature were lowered by 2 to $3^{\circ}C$ under duck weed growing condition while minimum soil and water temperature were higher in $0.5^{\circ}C$ and/or similar tendency than that of bare paddy soil condition. 2. The changes of soil and water temperature were lowered by 0.1 to $0.3^{\circ}C$ at sunny day under Duck weed growing condition but was higher in 0.1 ta $0.4^{\circ}C$ at rainy, cloudy and after rainy day than that of bare paddy soil. 3. Soil and water temperature were higher about 0.3 to $1.0^{\circ}C$ under algae growing condition than that of bare paddy condition. 4. The effects of keeping warm efficiency were high in order of Duck weed > Duck weed with algae > algae > bare paddy soil condition.

수온 및 지온변화에 단독(單獨) 또는 혼합(混合) 서식(棲息)하는 좀개구리밥, 붕어마름 및 조류등(藻類等)이 미치는 영향(影響)을 구명(究明)코자 1/200a 대형무저토관(大型無底土管)에서 조사연구(調査硏究)한 결과(結果)는 다음과 같았다. 1. 담수토양(湛水土壤)의 일중(日中) 최고수온 및 지온은 좀개구리밥 서식지(棲息地)가 무서식지(無棲息地)보다 $1{\sim}3^{\circ}C$정도(程度) 낮았으나 최저수온 및 지온은 같거나 $0.5^{\circ}C$정도(程度) 높았다. 2. 담수토양(湛水土壤)의 천기별(天氣別) 수온 및 지온은 좀개구리밥 서식지(棲息地)가 무서식지(無棲息地)보다 맑은 날은 $0.1{\sim}0.3^{\circ}C$ 낮았으나 구름 강우(降雨) 개임시(時)는 $0.1{\sim}0.4^{\circ}C$정도(程度) 높았다. 3. 조류서식(藻類棲息) 담수토양(湛水土壤)의 수온 및 지온은 무서식지(無棲息地)보다 $0.3{\sim}1.0^{\circ}C$ 높아 조류(藻類)에 의한 보온효과가 認定되었다. 4. 잡초서식(雜草棲息) 형태별(形態別) 수온 및 지온 보존(保存) 효과는 붕어마름 단독서식(單獨棲息)>혼합서식(混合棲息)>분개구리밥 단독서식(單獨棲息)>무서식(無棲息) 순(順)으로 높았다.