KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)
- Volume 33 Issue 3
- /
- Pages.254-261
- /
- 1988
- /
- 0252-9777(pISSN)
- /
- 2287-8432(eISSN)
A Simulation Model for Estimating Evapotranspiration of Soybean Crop
콩 생육시기별 증발산량의 추정모형 설정
- Son, Eung-Ryong (College of Agri., Korea Univ.) ;
- Eom, Ki-Cheol (Agricultural Science Institute, R.D.A.) ;
- Ryu, Kwan-Sig (Agricultural Science Institute, R.D.A.) ;
- Kim, Ki-Joon (College of Agri., Kon-Kuk Univ.)
- Published : 1988.09.01
Abstract
Lysimeter and field experiments were conducted in Sandy Loam to establish a simple estimation model for evapotranspiration (ET) of soybean for three years (l984-1986). Potential ET (PET) could be estimated by the eq.1 using Pan-evaporation (Eo) and was ranged from 1.1 to 4.6 mm/day during the experiments. PET (mm/day)=1.348+0.573 Eo …(1) Crop coefficient (Kc=maximum ET/PET) could be estimated by the eq.2 using Growth degree (G=days after planting/total growing days) and was ranged from 0.2 to 1.1 and from 0.6 to 1.4 for monoculture cropping and double cropping followed by barley, respectively, during the experiments. Monoculture : Kc=0.016+3.719 G-3.224 G
Keywords