Table 1.
Winter wheat cultivars and planting dates were selected in the 2008, 2009, 2010 and 2011.
Figure 1.
Daily rainfall, and supplemental irrigation for the Xiaotangshan site during the cropping seasons 2008/2009 (a), 2009/2010(b), 2010/2011 (c) and 2011/2012(d).
Table 2.
Irrigation schedule during experimental period (2008/2009, 2009/2010, 2010/2011 and 2011/2012).
Table 3.
Physical soil characteristics of the Xiaotangshan experimental site.
Figure 2.
Simulated and measured canopy cover (CC) for winter wheat under different planting dates and irrigation strategies in the cropping season 2008/2009 (a), 2009/2010 (b), 2010/2011 (c) and 2011/2012 (d).
Figure 3.
Relationship between the measured and simulated canopy cover (CC) in winter across 4 years.
Note: x represents the simulated CC, y represents the measured CC. The intercept represents the relative error between the simulated CC and the measured CC. The slope represents the consistency between the simulated CC and the measured CC.
Table 4.
Input data of crop parameters used in AquaCrop model.
Table 5.
Simulated and measured canopy cover (CC) for winter wheat under different planting dates in 2008/2009, 2009/2010, 2010/2011 and 2011/2012.
Figure 4.
The simulated as compared with the measured aboveground biomass accumulation at different growth stages for winter wheat with different planting dates and irrigation strategies in the cropping season 2008/2009 (a), 2009/2010 (b), 2010/2011 (c) and 201/2012 (d).
Figure 5.
Relationship between the measured and simulated biomass yield (BY) in winter wheat across 4 years.
Note: x represents the simulated BY, y represents the measured BY. The intercept represents the relative error between the simulated biomass yield and the measured BY. The slope represents the consistency between the simulated BY and the measured BY.
Figure 6.
Relationship between the measured and simulated grain yield (GY) in winter wheat across 4 years.
Note: x represents the simulated GY, y represents the measured GY. The intercept represents the relative error between the simulated GY and the measured GY. The slope represents the consistency between the simulated GY and the measured GY.
Table 6.
Simulated and measured biomass yield (BY) for winter wheat under different planting dates in 2008/2009, 2009/2010, 2010/2011 and 2011–2012.
Figure 7.
Relationships between the measured grain yield (GY), biomass yield (BY) and transpiration (T) in winter wheat.
Note: (a) x represents transpiration, y represents the measured GY. The intercept represents the relative estimation error between transpiration and the measured GY. The slope represents the estimation consistency between transpiration and the measured GY. (b) x represents transpiration, y represents the measured BY. The intercept represents the relative estimation error between transpiration and the measured BY. The slope represents the estimation consistency between transpiration and the measured BY.
Table 7.
Biomass-WUE and Grain-WUE in response to the seasonal transpiration over the different planting dates across years at Xiaotangshan experimental site.