抄録
Windbreak nets and plant windbreaks are effective in suppressing maize pollen dispersal and crosspollination. This paper seeks effective arrangements of windbreak nets or plant windbreaks to suppress cross-pollination from a 50 m square maize donor plot. A pair of numerical models, the A2Cflow and A2Ct&d, which had previously validated the pollen dispersal and cross-pollination in the maize plot, were used. 3-m tall 1-mm mesh nets and 2-m tall sorghum windbreaks were confirmed to be effective in suppressing cross-pollination in a 1.8-m tall maize plot. The isolation distance for a 0.9% criterion of cross-pollination rate was reduced from 50 m without a windbreak to 22 m when four lines of windbreak nets were arranged. The wind speed was 3 ms-1. In commercial cultivation, plant windbreaks may reduce installation and labor costs rather than windbreak nets. Three lines of plant windbreaks are equivalent to a one line windbreak net in suppressing cross-pollination.