Journal of The Korean Society of Grassland and Forage Science (한국초지조사료학회지)
- Volume 6 Issue 1
- /
- Pages.60-64
- /
- 1986
- /
- 2287-5824(pISSN)
- /
- 2287-5832(eISSN)
Effects of Soil Moisture on Photosynthesis , Transpiration and Stomatal Resistance in sotghums II.Ondiurnal changes
토양수분이 수수류의 광합성 , 증산량 및 기공저항에 미치는 영향 II. 광합성과 증산량의 일중변화
Abstract
To determine the effects of soil moisture on diurnal changes of photosynthesis, transpiration and stomatal resistance, sorghum and soghum-sudangrass hybrid were grown at large concrete pots maintained at 100, 80, 60 and 40% of field moisture capacity. Photosynthesis were measured from a.m. 6 to p.m. 6 on a fine day. 1. Photosynthesis and transpiration reacted similarly to water stress and environmental factors, and they reached at their maximum points from noon to 2 p.m. and decreased sharply after 4 p.m. 2. Photosynthesis and transpiration of sorghum were higher at 60% field moisture capacity than those of the other field moisture capacities. In sorghum-sudangrass hybrid, photosynthesis was in the order of 60>80>40>100% and transpiration was in the order of 60>80>100>40%. 3. Stomatal resistance did not show clear diurnal change and was the lowest at 60% among four field moisture capacities.
생육후기(生育後期)의 환경조건(環境條件)에서 토양수분함량(土壤水分含量)이 수수류(類)의 광합성(光合成), 증산(蒸散), 기공저항(氣孔抵抗)의 일변화(日變化)에 미치는 영향(影響)을 비교(比較)할 일적(日的)으로 1985년도(年度) 축산시험장(畜産試驗場)의 포장(圃場)에서 대형(大型) 콘크리트 폿트에 토양수분(土壤水分)을 포장용수량(圃場容水量)의 100, 80, 60 및 40%가 유지되도록 조절(調節)하고 수수와 수수
Keywords