Pollen diffusion simulation of rice based on Lagrange random walk model
Based on the pollen source sizes of 5m×5m(T1),10m×10m(T2)and 15×15m(T3),the sedimentation of rice pollen in the pollen source area and the cumulative values of non-point pollen concentration were studied by using the Lagrange random walk-based rice pollen diffusion(LRWRPD)model.The results were as follows:(1)the correlation between the measured and simulated values of pollen deposition was good,which was feasible for the optimized LRWRPD model.(2)Pollen sedimentation of rice increased sharply at first,then increased steadily and slowly,and decreased in negative exponential form outside the source area.With the increase of the size of pollen source,the effect of wind on rice pollen diffusion was more significant,that is,the effect of wind on large-size pollen sources was greater than that of small pollen sources.(3)With the increase of the size of pollen source,the cumulative value of the concentration of pollen non-point source increased,and the trend of this change was to increase sharply and then gradually smooth out.
万方数据
维普
