Research Potato Potential Yield Based On SOLANUM Model In Tianshui And Dingxi

Crop model is one of the most simply tool to analyze crop potential yield. Using the crop model for simulating crop growth and development, and formulate the optimization management measures to achieve the goal of yield. The applicability of SOLANUM model was verified by Tianshui and Dingxi in 2014-2015. Analysis SOLAN UM model simulation results of potato by actual meteorological data and NASA meteorological dat a. Using actual meteorological data and NASA meteorological data to simulate potato yield(Tianshui and Dingxi) under different planting date and planting density basis on the model of SO LANUM crops parameter validation in 2014 and 2015. The results showed that:1. In the process of model validation, Tianshui(Nongtian-1, Qingshu-9) and Dingxi(Xindaping) fresh tuber weight RRMSE of simulated values and the measured values is less than 27.3% for Nongtian-1, and EF is higher than 0.87. Potato canopy coverage index RRMSE of the simulated values and the measured values are less than 25.8%, and EF are higher than 0.80. SOLAN UM model of potato fresh tuber weight and canopy coverage simulation effect is good. Potato yield of the simulated values and the measured values are not significant difference. So, SOLANUM model is suitable for the simulation of potato growth and yield.2. By using actual meteorological data and NASA meteorological data run SOLANUM model to simulate tianshui(Nongtian-1, Qingshu-9), dingxi(Xindaping) potato growth and yield in 2014 and 2015: The results of Notian-1and Q ingshu-9 simulated tuber fresh weight of actual meteorological data and NASA’s meteorological data weight RRMSE are higher than 25.0%, EF are less than 0.83. Canopy cover index simulation results of RRMSE are higher than 30%, EF less than 0.80. Yield significant difference between the simulation results. It turned out that we can’t completely substitute NASA meteorological data for the actual meteorological data to simulate potato growth and yield accurately in the tianshui and dingxi.3. By using the actual meteorological data and NASA meteorological data run SOLANUM model to simulate Tianshui(Nongtian-1, Qingshu-9), Dingxi(Xindaping) potato yield under different planting date and planting density for 2014 and 2015, it can be seen that: 1) We can use NASA meteorological data instead of the actual meteorological data to run SOLANUM model simulation potato yield under different planting date and plant density. 2) When keeps the same planting density, with a potato planting dates to delay, the potato yield increase by potato yield. However, when planting date arrived at a certain time, the potato yield reaches the maximum. Then delay the planting dates, the potato yield began to decrease. Potato yield is not obvious change in planting density for 5plant /m2, 6plant /m2, 7plant /m2 of the potato under the same planting date. 3) The effect of Planting date and plant density on potato yield : Nongtian-1 and Q ingshu-9 planting date are May 6, 5plant/m2 is superior the other in 2014; Nongtian-1 and Q ingshu-9 planting date are May 18, 5plant/m2 is superior to the other in 2015. Xindaping planting date is May 8, 5plant/m2 is superior the other in 2014; Xindaping planting date is May 11, 5plant/m2 is superior the other in 2015.