Premium
Thermal Infrared Radiation for Assessing Crop Water Stress in Wheat
Author(s) -
Kumar Alok,
Tripathi R. P.
Publication year - 1990
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.1990.tb00862.x
Subject(s) - water stress , irrigation , environmental science , water content , canopy , agronomy , crop , soil water , leaf area index , vapour pressure deficit , stress (linguistics) , soil science , biology , ecology , botany , transpiration , geotechnical engineering , engineering , linguistics , philosophy , photosynthesis
Field studies on differentially irrigated wheat ( Triticum aestivum L.) crops were conducted at Pantnagar for two years to evaluate the use of thermal infrared radiation to detect crop water stress. Data show that the stress‐degree‐day index (mid day canopy‐air temperature difference) is influenced by environmental variability other than soil moisture. Improvement in the stress‐degree‐day (SDD) index was achieved by including the measurements of vapor pressure deficit and approach was termed as plant water stress index (PWSI). Observations indicated that daily variation in SDD values due to meteorological changes was removed through PWSI. Better correlation was found between soil‐induced leaf water potential and plant water stress index than between total leaf water potential and plant water stress index. It is concluded that remote sensing of thermal infrared radiation offers a promising technique which can be incorporated into irrigation management programme.