美国黑核桃原产北美洲，是一种果材兼用、多用途的珍贵阔叶树种。１９８４年，中国林科院在河南省洛宁县长水核桃试验站进行美国黑核桃引种试验，首批引进的种子来自美国加州的基因资源中心，以魁核桃、北加州黑核桃和奇异核桃为主。在洛宁县官西村建立的黑核桃种子园，１９９ American black walnut origin North America, is a kind of both fruit and vegetable, multi-purpose precious broad-leaved species. In 1984, the Chinese Academy of Forestry at the Longding Walnut Experimental Station in Luoning County, Henan Province, introduced the American black walnut. The first seeds were introduced from the Genetic Resource Center of California, USA, mainly consisting of Quercus walnut, Northern California black walnut and exotic walnut . Black walnut seed orchard set up in Guanxi Village, Luoning County, 199