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Replication data for: Effect of partial root-zone drying irrigation timing on potato tuber yield and water use efficiency

International Potato Center Dataverse OAI Archive

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Title Replication data for: Effect of partial root-zone drying irrigation timing on potato tuber yield and water use efficiency
 
Identifier https://doi.org/10.21223/P3/MIVGMU
 
Creator Yactayo, Wendy
Ramirez, David
Gutierrez, Raymundo
Mares, Victor
Posadas, Adolfo
Quiroz, Roberto
 
Publisher International Potato Center
 
Description Partial root-zone drying (PRD) is an irrigation technique which has shown increased water use efficiency (WUE) without yield reductions in potato and other crops. However, questions remain as to the effect of the water restriction initiation timing and the level of alternate water restriction on the response of the potato crop. In this study, we tested: two PRD treatments with 25% (PRD25) and 50% (PRD50) of total water used in full irrigation (FI, as control), and a deficit irrigation treatment with 50% of water restriction (DI50). Two water restriction initiation timings were tested at: 6 weeks (WRIT6w) and 8 weeks (WRIT8w) after planting. Osmotic potential, osmotic adjustment, relative water content and chlorophyll concentration were assessed in four dates during the growing period. PRD50 initiated at WRIT6w showed the highest WUE without a tuber yield reduction respect to the control. While plants under PRDs and DI50 showed lower than FI, PRDs treatments promoted higher osmotic adjustment particularly in WRIT6w. Our study suggests that early PRDs with mild water restriction allow drought hardiness (improving water stress response) and water saving avoiding a dramatic yield tuber reduction.
 
Subject Agricultural Sciences
Osmotic adjustment
Root-zone drying (PRD)
Solanum tuberosum
Stay green effect
 
Language English
 
Contributor Administrator, CIP
International Potato Center
CGIAR Research Program on Roots, Tubers and Bananas (RTB)
CGIAR Research Program on Water, Land and Ecosystems (WLE)
De Mendiburu, Felipe; Silva, Luis; Alarcon, Nikolai
Project: Defining management strategies to improve water use efficiency and soil carbon stocks in rainfed systems and modeling their impact at different spatial and temporal scales