1. Monitor key parameters of winter wheat using Crop model
- Author
-
Qi Xiudong, Yue Jibo, and Feng Haikuan
- Subjects
Canopy ,Hydrology ,0208 environmental biotechnology ,Biomass ,Growing season ,04 agricultural and veterinary sciences ,02 engineering and technology ,Arid ,020801 environmental engineering ,Geography ,Agronomy ,Yield (wine) ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Stage (hydrology) ,Precision agriculture ,Water content - Abstract
Estimation of biomass, canopy cover and yield is very important to agricultural decision Precision Farming. During the winter wheat growing season of 2013/2014, field measurements were conducted at Yangling District, Shaanxi Province at the jointing stage, heading stage and filling stage. AquaCrop model and Particle swarm optimization algorithm was used to find the global optimal simulation when the intermediate variable was the biomass. Through the simulation for each of the experimental data, biomass, canopy coverage and soil moisture were verification by ground measurements. Based on 8 sets of data, the simulation accuracy was calculated. The RMSE, nRMSE, MAE and R2 between simulation and measured biomass were 1.06 ton/ha, 11.92%, 0.90 ton/ha and 0.92. The RMSE, nRMSE, MAE and R2 between simulation and measured canopy cover were 8.92%, 9.84%, 7.84% and 0.66, respectively. The simulation results show that the AquaCrop model can help the decision making of winter wheat field in arid areas.
- Published
- 2016