Use of infrared temperature for irrigation scheduling in peppermint (Mentha piperita L.)

Iván Gallardo A.1, Richard H. Cuenca2, Marshall English2 y Allan Mitchell2

Infrared canopy temperature in peppermint (Mentha píperíta L.) under five irrigation treatments was used in orden to determine its potential for irrigation scheduling.
The Crop Water Stress Index (CWSI) determined from canopy temperature, air temperature and vapor pressure delicit (Vpd), at midday can be used in irrigation scheduling.
The upper baseline for the CWSI was set at a difference between canopy and air temperature of 6.6 ºC, the lower baseline measuredwas.
∆t = 1.32 - 0.98 Vpd; r2 = 0.69.

Keywords: Mentha piperita, infrared temperature, ¡rrigation, CWSI, scheduling.
1 Estación Experimental Quilamapu (INIA), Casilla 426, Chlllán, Chile.
2 Department of Bloresource Engineering, Oregon State University, Corvallis, EE.UU.