Title
Performance assessment of the AquaCrop model to estimate rice yields under alternate wetting and drying irrigation in the coast of Peru
Date Issued
01 July 2020
Access level
open access
Resource Type
journal article
Author(s)
Porras-Jorge R.
Ojeda-Bustamante W.
Ontiveros-Capurata R.E.
Publisher(s)
Universidad Nacional de Trujillo
Abstract
Peru is the second-largest rice producer in Latin America, with 406166 ha grown annually, predominately on the Peruvian north coast. However, rice is primarily irrigated by flooding (93%), which demands high water use (15000-18000 m3 ha−1) owing to low water-use efficiency. Additionally, the intensification of climate change is of great concern as it causes high variability as well as a decreasing trend in water resource availability. Alternate wetting and drying (AWD) irrigation technique reportedly reduce the irrigation volumes while maintaining conventional yield rates. The AquaCrop model was calibrated and assessed to simulate rice yield response to the AWD technique under water shortage conditions on the Peruvian central coast. The AquaCrop model exhibited a “very good” to “good” performance in predicting canopy cover development, soil water content, aerial biomass, and grain yield using performance indicators, such as the Nash-Sutcliffe efficiency coefficient, the RMSE observations standard deviation ratio (RSR), Willmott index, and determination coefficient. The calibrated model showed a good performance of rice under AWD irrigation, indicating that this technique can be used to assess rice production under Peruvian arid conditions.
Start page
309
End page
321
Volume
11
Issue
3
Language
English
OCDE Knowledge area
Agricultura
Scopus EID
2-s2.0-85090556529
Source
Scientia Agropecuaria
ISSN of the container
20779917
Sources of information: Directorio de Producción Científica Scopus