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A New Approach of Canopy Temperature based Irrigation Scheduling of Wheat in Humid Subtropical Climate of India

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Title A New Approach of Canopy Temperature based Irrigation Scheduling of Wheat in Humid Subtropical Climate of India
Not Available
 
Creator Monalisha Pramanik
Rajeev Ranjan
N. K. Garg
S. K. Tripathi
Ranvir Singh
 
Subject Canopy temperature _ Crop water stress _ Infrared thermometer _ Irrigation scheduling _ Wheat
 
Description Not Available
The aim of the study is to develop a new
canopy temperature based index named plant stress index
(PSI) as an irrigation schedule tool and to develop a relationship
between soil water depletion and PSI at different
threshold values for wheat crop in humid subtropical climate.
The experiments were conducted in two growing
seasons 2008–2009 and 2009–2010 in Roorkee, India. Irrigations were scheduled as and when PSI reached to 0.25(T2), 0.5 (T3) and 0.75 (T4). Two treatments, one fully irrigated (T1) and one fully stressed (T5) were maintained to measure the reference minimum and maximum canopy temperatures. Canopy temperatures were measured with infrared radiometers. Soil moisture contents were measured with soil moisture sensors buried at 20 cm interval up to 100 cm. An automatic weather station was installed to measure the net radiation, wind speed, relative humidity and air temperature etc. concurrently at half an hour interval on the study field. To maintain PSI below corresponding threshold values, a total irrigation amount of 280, 252, 224, 214 and 50 mm during season 2008–2009 and 275, 240, 224, 201 and 50 mm during season 2009–2010 were applied in T1,T2,T 3T4and T5 treatments, respectively. The experimental results gave an exponential relationship between percentage depletion of available soil moisture and threshold values of PSI. The results suggested that PSI may be maintained at 0.5 for getting optimum production of wheat. Corresponding to 0.5 PSI, the percentage depletion of available soil moisture was found to be approximately equal to 32 %.
Not Available
 
Date 2020-06-01T08:10:45Z
2020-06-01T08:10:45Z
2015-12-16
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/36710
 
Language English
 
Relation Not Available;
 
Publisher Not Available