Estimating wheat root biomass using ground penetrating radar

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Remote sensing –Beyond images Mexico 14-15 December 2013 The workshop was organized by CIMMYT Global Conservation Agriculture Program (GCAP) and funded by the Bill & Melinda Gates Foundation (BMGF), the Mexican Secretariat of Agriculture, Livestock, Rural Development, Fisheries and Food (SAGARPA), the International Maize and Wheat Improvement Center (CIMMYT), CGIAR Research Program on Maize, the Cereal System Initiative for South Asia (CSISA) and the Sustainable Modernization of the Traditional Agriculture (MasAgro)

Bildung Technologie

Estimating wheat root biomass
using ground penetrating radar
Sean M. Thompson, Alfredo Delgado, R. Esten Mason,
C. Mariano Cossani, Matthew P. Reynolds,
Amir M. H. Ibrahim, Ronald E. Lacey,
Robert A. Washington-Allen, and Dirk B. Hays
CIMMYT Remote Sensing - Beyond Images
December 14-15, 2013
© Sean M. Thompson 2013 - All Rights Reserved

Phenotyping roots
0-30 cm

30-60 cm

60-90 cm

90-120 cm

2

© Sean M. Thompson 2013 - All Rights Reserved

Hypothesis
GPR is capable of phenotyping root biomass of wheat in
situ.

Objectives
Develop the use of GPR for phenotyping below ground
biomass, in the context of higher yield stability during
drought and high temperature stress.
•  The validation of GPR to non-destructively detect wheat
roots in a controlled and stressed environment for
correlation to traditional destructive root measurements.

3

© Sean M. Thompson 2013 - All Rights Reserved

Two-way travel time (nanoseconds)

Antenna

Antenna

00
–

02
–

04
–

06
–

08
–

10
–

12
–

Soil Sci. Soc. Am. J. 67:1607–1615 (2003)

4

© Sean M. Thompson 2013 - All Rights Reserved

0-30 cm

Plot width

30-60 cm

Antenna

Antenna

Antenna

60-90 cm

90-120 cm

5

© Sean M. Thompson 2013 - All Rights Reserved

Waterlogging treatment

Control treatment
March 20, 2013 Pre-Waterlogging

April 8, 2013 (19) Waterlogging

April 16, 2013 (27) Waterlogging

(Images: R. Esten Mason)

6

© Sean M. Thompson 2013 - All Rights Reserved

Geophysical
Archaeometry
Laboratory

GPR-Slice
7

© Sean M. Thompson 2013 - All Rights Reserved

Spatial analysis

8

© Sean M. Thompson 2013 - All Rights Reserved

Time slices

9

© Sean M. Thompson 2013 - All Rights Reserved

Conclusions
•  Spatial relationship between
plots and GPR amplitude
return in both control and
treatment.
•  In field spatial variability
will need to be considered in
future GPR studies.
•  Root biomass and depth can
be visualized by GPR .

10

© Sean M. Thompson 2013 - All Rights Reserved

Looking forward
•  CIMMYT
–  Deeply rooted partnership

•  IDS Multi Array System
–  Root Depth / Biomass
–  Root Architecture
–  Field-Based HTP

•  GPR-Slice
–  Rapid Data Analysis
–  User Friendly Interface
–  In Field Data Processing
isdcorporation.com
11

© Sean M. Thompson 2013 - All Rights Reserved

isdcorporation.com
12

© Sean M. Thompson 2013 - All Rights Reserved

Support
Texas A&M AgriLife Research
Texas Cropping System Grant
Texas A&M University, Soil & Crop Sciences

Texas Wheat Producers Board
Wheat Physiological Breeding
Texas A&M University, Small Grains Breeding Program

International Maize and Wheat Improvement Center
Global Wheat Program, Wheat Physiology
Consultative Group on International Agricultural Research

United States Department of Agriculture
U.S. Borlaug Fellows in Global Food Security
Purdue University, Center for Global Food Security

13

© Sean M. Thompson 2013 - All Rights Reserved

Team members
Texas A&M AgriLife
•  Wheat Physiology, Small Grains Breeding
•  Small Grains Extension

University of Arkansas
•  Small Grains Breeding

CIMMYT
•  Physiology
•  Breeding
•  Biostatistics

14

© Sean M. Thompson 2013 - All Rights Reserved

Sean M. Thompson
sean.thompson@tamu.edu | precision-phenotyping.com

Alfredo Delgado
adelgado.tamu@gmail.com| soilcrop.tamu.edu

“Do not only practice your art, but force your way into
secrets, for it and knowledge can raise man to the
divine.” -Beethoven

15

© Sean M. Thompson 2013 - All Rights Reserved

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