黄榆(Ulmus macrocarpa)是半干旱地区优良的先锋树种和水土保持树种及用材树种。黄榆适应性强,林分生长稳定,对改善辽西地区的生态环境将会产生积极作用。辽西有大面积荒山荒地,其中以造林困难的次生裸地居多,原始植被已不复存在。人工植被以油松(Pinus tabulaeformis)占绝对优势,但生长极不稳定,虫害十分严重。建立稳定的森林群落,改善生态环境,是辽西林业面临的首要问题。1983、1984年, Ulmus macrocarpa is an excellent pioneer tree species, soil and water conservation tree species and timber species in the semi-arid area. Huangyu adaptability, stand growth and stability, to improve the ecological environment in western Liaoning will have a positive effect. There is a vast area of ​​barren hills and wilderness in western Liaoning, of which the secondary nudity of afforestation is the most, and the original vegetation no longer exists. Artificial vegetation with Pinus tabulaeformis dominated, but the growth is extremely unstable, pest is very serious. Establishing a stable forest community and improving the ecological environment are the primary problems facing the forestry in western Liaoning. 1983, 1984,