REN R446 Lecture Notes - Lecture 6: Sensible Heat, Permanent Wilting Point, Water Potential

• School: University of Alberta
• Department: Renewable Resources
• Course: REN R446
• Professor: Robert Grant

Document Summary

Surface water dries out and stays dry with no irrigation (water sitting at wilting point) Lower soil water content, lower soil water potential with no irrigation. Canopy water potential will have to decrease (be more negative than the soil) to offset and protect itself: closes its stomates. As water stress progresses, stomatal resistance gets higher. Latent heat: more latent heat dissipated in control (with irrigation, no irrigation: the latent heat dissipation is strongly curtailed (less evapotranspiration, less water) Co2 influx smaller in no irrigation (stomatal closure: combination of autotrophic and heterotrophic respiration. Assignment: cli(cid:272)k o(cid:374) optio(cid:374)s, t(cid:455)pe i(cid:374) 3. 3 i(cid:374) 8 (cid:271)o(cid:454)es (cid:894)additio(cid:374) (cid:272)olu(cid:373)(cid:374)s(cid:895, save, wtr_3. Day of the year (julian days: psi_can. 1 m s e c n a t s i s e. Days of the year (julian days: eco_le. Days of the year (julian days: eco_co2. 2 m l o m o r c m i e g n a h c x.