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United States Department of Agriculture

Agricultural Research Service

Research Project: CHARACTERIZATION AND ENHANCEMENT OF PLANT RESISTANCE TO WATER-DEFICIT AND THERMAL STRESSES

Location: Plant Stress and Germplasm Development Research

Title: Biotic: a Novel Method for Variable Rate Irrigation

Authors
item Mahan, James
item Mahan, James
item Wanjura, Donald

Submitted to: National Cotton Council Beltwide Cotton Conference
Publication Type: Abstract Only
Publication Acceptance Date: January 9, 2007
Publication Date: January 12, 2007
Citation: Mahan, J.R., Wanjura, D.F. 2007. BIOTIC: A Novel Method for Variable Rate Irrigation[abstract]. National Cotton Council Beltwide Cotton Conference. January 9-12, 2007, New Orleans, Louisiana. CDROM.

Technical Abstract: The BIOTIC irrigation protocol was developed as an irrigation scheduling protocol that utilizes a biologically based temperature optimum to detect plant water deficits. BIOTIC provides full irrigation that is comparable to other methods under a variety of crops and environments. The utilization of an environmental time threshold allows the application of the protocol on irrigation systems in which there is a time delay between stress detection and irrigation application. Under variable rate irrigation conditions it is possible to modify the time threshold value in a manner that will control irrigation scheduling that results in the imposition and control of water deficits. Field experiments have demonstrated the utility of the approach in managing deficit irrigations in a that provides for a variable irrigation frequency with a defined amount of water or a set irrigation frequency with variable amounts of water application. Both approaches provide the potential for management of water deficits and the associated water savings required in many crop production systems.

Last Modified: 4/19/2014
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