Eco-geographical flora of pathogeny was discussed, and divided in to 3 forestation areas, such as sand forest center arboretum, 106 sand fixation areas and Wuhai sand-fixation forest.

• 讨论了病原物的生态地理区系，并分为沙林中心植物园、106治沙工区、乌海治沙林场3个固沙造林区。