泡桐是经济价值较高的用材树种,若一旦发生瓦旋,其园木解板后,板材常沿年轮处呈瓦片形翘裂脱落而成废材,严重降低了泡桐木材利用率和经济价值。群众惋惜地说:“生长十余年,废于朝夕间”。由此可见,泡桐瓦旋实为生产上急待解决的迫切问题。但至今这方面的研究报道甚少。为此,1983年许昌地区协作组针对泡桐立木瓦旋的直观特征鉴别及其发生情况作了一些初步探 Paulownia is a timber species with high economic value. Once the tile is shed, the garden timber is uncoiled, and the slab often appears as waste tile with tile-shaped crack along the annual rings, which seriously reduces the utilization rate and economy of the Paulownia wood value. The masses said with regret: “more than ten years of growth, spent in the morning and evening.” This shows that Paulownia tile screw solid production urgent problem to be solved. But so far little research has been reported in this area. Therefore, in 1983, the Xuchang District Collaboration Group made some preliminary studies on the visual characteristics identification and the occurrence of the Paulownia tile shingle turn