Specifications

13.
Accession number: 20133516671274
Title: Evaluation of the AquaCrop model for simulating the impact of water deficits and
different irrigation regimes on the biomass and yield of winter wheat grown on China's Loess
Plateau
Authors: Xiangxiang, Wang1, 2 ; Quanjiu, Wang1, 3 ; Jun, Fan1, 2 ; Qiuping, Fu1, 2/;王全
九;;;
Author affiliation:
1 State Key Laboratory of Soil Erosion, Dryland Farming on the Loess Plateau,, Institute of Soil
and Water Conservation, CAS and MWR, Yangling 712100, Shaanxi, China
2 Graduate University of Chinese Academy of Science, Beijing 100039, China
3 Institute of Water Resource Research, Xian University of Technology, Xian 710048, China
Corresponding author: Quanjiu, W. ([e-mail])
Source title: Agricultural Water Management
Abbreviated source title: Agric. Water Manage.
Volume: 129
Issue date: November 2013
Publication year: 2013
Pages: 95-104
Language: English
ISSN: 03783774
CODEN: AWMADF
Document type: Journal article (JA)
Publisher: Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands
Abstract: Accurate models of crop growth are important for evaluating the effects of water
deficits on crop yield or productivity. AquaCrop was developed by the FAO (Food and Agricultural
Organization) of the United Nations to simulate yield responses to changes in the supply of water.
The objectives of this study were to evaluate the model's ability to simulate winter wheat
performance under full and deficit water conditions on China's Loess Plateau and to study the
effect of different irrigation scenarios on wheat yield. The model's output was compared to
experimental data collected between 2006 and 2011 at the Changwu Agri-ecological Station on
the Loess Plateau. The model accurately estimated the soil water content of the root zone as well
as the biomass and grain yields of winter wheat. When simulating the soil water during the
2008-2009 growing season, the calculated values of r2, RMSE, ME, and the d-index were 0.98,
8.4mm, 0.98, and 0.99 for no irrigation; 0.95, 14.4mm, 0.93, and 0.98 for double irrigation; 0.88,
22.9mm, 0.68, and 0.90 for triple irrigation; and 0.93, 17.5mm, 0.75, and 0.9 for quadruple
irrigation, respectively. For the grain yield, the r2 values for the model's outputs under the single
irrigation, double irrigation, triple irrigation, and quadruple irrigation treatments were 0.80, 0.98,
0.99, and 0.77, respectively. Comparing to no irrigation the highest increases in grain yield were
observed for scenarios in which irrigation was applied during the over-wintering and turning
green stages. Moreover, the simulations indicated that under double irrigation regimes, water
can be withheld during over-wintering and either turning green or stem elongation without
greatly reducing yields. The minimum amounts of irrigation water required to achieve high WUE