TY - JOUR
T1 - Inter-relationships between water depletion and temperature differential in row crop canopies in a sub-humid climate
AU - Singh, Jasreman
AU - Ge, Yufeng
AU - Heeren, Derek M.
AU - Walter-Shea, Elizabeth
AU - Neale, Christopher M.U.
AU - Irmak, Suat
AU - Woldt, Wayne E.
AU - Bai, Geng
AU - Bhatti, Sandeep
AU - Maguire, Mitchell S.
N1 - Funding Information:
The funding for this research was provided by a grant from the USDA NIFA Agricultural and Food Research Initiative (Award Number 2017-67021-26249 ) and Graduate Student Support from the Robert B. Daugherty Water for Food Global Institute at the University of Nebraska . Additional support was received from the Hatch Act (USDA NIFA, Accession Number 1009760 ) and the Department of Biological Systems Engineering at the University of Nebraska-Lincoln . The authors thank Dr. Burdette Barker for input in the experimental design; Alan L. Boldt, Jake Richardson, Eric Wilkening, Divine Kantarama, Troy Nelson, Tony Ruhinda, Joviale Uwase, Kate Yang, and Arena-Ezzati See for assistance with the data collection; Mr. Mark Schroeder and his team from the University of Nebraska’s Eastern Nebraska Research and Extension Center for their cooperation and help with field operations; and Dr. Christine Booth and Suresh Pradhyun Kashyap for reviewing earlier versions of the manuscript. Weather data were provided by the Nebraska Mesonet and the Nebraska State Climate Office through the High Plains Regional Climate Center.
Funding Information:
The funding for this research was provided by a grant from the USDA NIFA Agricultural and Food Research Initiative (Award Number 2017-67021-26249) and Graduate Student Support from the Robert B. Daugherty Water for Food Global Institute at the University of Nebraska. Additional support was received from the Hatch Act (USDA NIFA, Accession Number 1009760) and the Department of Biological Systems Engineering at the University of Nebraska-Lincoln. The authors thank Dr. Burdette Barker for input in the experimental design; Alan L. Boldt, Jake Richardson, Eric Wilkening, Divine Kantarama, Troy Nelson, Tony Ruhinda, Joviale Uwase, Kate Yang, and Arena-Ezzati See for assistance with the data collection; Mr. Mark Schroeder and his team from the University of Nebraska's Eastern Nebraska Research and Extension Center for their cooperation and help with field operations; and Dr. Christine Booth and Suresh Pradhyun Kashyap for reviewing earlier versions of the manuscript. Weather data were provided by the Nebraska Mesonet and the Nebraska State Climate Office through the High Plains Regional Climate Center.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/10/1
Y1 - 2021/10/1
N2 - Irrigation has a great impact on global food security as it contributes to the majority of the world's agricultural food supply. It is essential to judiciously utilize water resources through efficient irrigation management since the majority of U.S. groundwater aquifers are rapidly depleting. Thus, quantification of the relationships between water depletion and environmental factors is important for understanding crop response to varying levels of water stresses that depletion can cause. The objectives of this research were to: 1) investigate the relationship between root zone water depletion (Drw) and canopy temperature differential (ΔT) at different ranges of Drw; and 2) develop upper (water stressed) and lower (non-water stressed) baselines for quantification of crop water stress index (CWSI) in a sub-humid climate. The research was conducted over maize and soybean during 2018, 2019, and 2020 growing seasons. Sensor node stations comprising of an infrared thermometer and three soil water sensors were installed at various sites over maize and soybean fields. ΔT tends to increase with the increase in Drw when the range of Drw includes values greater than 170 mm for maize and values greater than 160 mm for soybean. The results indicate that ΔT and Drw are unrelated until a soil-water depletion threshold is attained, and these Drw threshold values could be considered as indicators to trigger irrigation for efficient agricultural water management. To the best of the authors’ knowledge, the research is the first to develop upper and lower CWSI baselines for east-central Nebraska. The baselines developed in this study could facilitate the quantification of CWSI for irrigation scheduling of maize and soybean in east-Central Nebraska. Future work should aim to investigate the potential in using Drw and/or ΔT to determine efficient water allocation and if a threshold CWSI could be used for timing of irrigation to prevent yield loss.
AB - Irrigation has a great impact on global food security as it contributes to the majority of the world's agricultural food supply. It is essential to judiciously utilize water resources through efficient irrigation management since the majority of U.S. groundwater aquifers are rapidly depleting. Thus, quantification of the relationships between water depletion and environmental factors is important for understanding crop response to varying levels of water stresses that depletion can cause. The objectives of this research were to: 1) investigate the relationship between root zone water depletion (Drw) and canopy temperature differential (ΔT) at different ranges of Drw; and 2) develop upper (water stressed) and lower (non-water stressed) baselines for quantification of crop water stress index (CWSI) in a sub-humid climate. The research was conducted over maize and soybean during 2018, 2019, and 2020 growing seasons. Sensor node stations comprising of an infrared thermometer and three soil water sensors were installed at various sites over maize and soybean fields. ΔT tends to increase with the increase in Drw when the range of Drw includes values greater than 170 mm for maize and values greater than 160 mm for soybean. The results indicate that ΔT and Drw are unrelated until a soil-water depletion threshold is attained, and these Drw threshold values could be considered as indicators to trigger irrigation for efficient agricultural water management. To the best of the authors’ knowledge, the research is the first to develop upper and lower CWSI baselines for east-central Nebraska. The baselines developed in this study could facilitate the quantification of CWSI for irrigation scheduling of maize and soybean in east-Central Nebraska. Future work should aim to investigate the potential in using Drw and/or ΔT to determine efficient water allocation and if a threshold CWSI could be used for timing of irrigation to prevent yield loss.
KW - Crop canopy
KW - Infrared thermometers
KW - Irrigation
KW - Root zone water depletion
KW - Stressed baselines
KW - Temperature differential
UR - http://www.scopus.com/inward/record.url?scp=85109451647&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85109451647&partnerID=8YFLogxK
U2 - 10.1016/j.agwat.2021.107061
DO - 10.1016/j.agwat.2021.107061
M3 - Article
AN - SCOPUS:85109451647
SN - 0378-3774
VL - 256
JO - Agricultural Water Management
JF - Agricultural Water Management
M1 - 107061
ER -