近年来山西省屯留县致力于核桃新品种开发取得明显成果。目前，该县的良种核桃基地已达到6666.7hm2，每年可向社会提供优种核桃苗木近100万株，优种接穗60余万条，成为全省最大的优质核桃种源基地。1990年以来，该县从国家科委引进了“中罗经济林研究项目”，与罗马尼亚核桃专 In recent years, Tunliu County, Shanxi Province dedicated to the development of new varieties of walnut made significant achievements. At present, the county’s walnut seed base has reached 6666.7hm2, each year to the community to provide excellent seedlings nearly 1 million walnut seedlings, more than 60 million outstanding scion, becoming the province’s largest high-quality walnut provenance base. Since 1990, the county has introduced “Zhongluo Economic Forest Research Project” from the State Science and Technology Commission and has cooperated with the Romanian Walnut Academy