川楝(Melia toosendan Sieb·et Zucc)主产我国四川、湖北、湖南、贵州、云南等地,是长江流域速生用材和四旁绿化的重要树种。周口地区位于黄淮平原,广泛分布着低洼易涝砂姜黑土、沙碱土等低产宜林地。但长期以来,尚未有适合上述土壤类型生长的优质速生树种。为此,我们根据川楝在原产地所表现出的速生、优质、抗病虫、耐水 Melia toosendan Sieb et Zucc is mainly produced in Sichuan, Hubei, Hunan, Guizhou, Yunnan and other places in China. It is an important tree species for fast growing timber and greening in the Yangtze River basin. Zhoukou area is located in the Huang-Huai Plain, widely distributed in the low-lying flood-prone Shajiang black soil, sandy soils and other low-yielding forest land. However, for a long time, no high-quality fast-growing tree suitable for the above soil types has been developed. To this end, we have shown according to the origin of Chuanmai fast-growing, high-quality, pest-resistant, water-resistant