トウモロコシ花粉飛散および交雑抑制に対して効果的な防風施設の配置方法に関する数値実験

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.