The Status and Measures for Excellent Variety Development of Walnut Industry in the Southwest Margin of the Sichuan Basin——A Case Study of Ningnan County

By analyzing the development status of walnut industry in Ningnan County, problems and shortcomings were pointed out in the breeding process of superior varieties, and measures and suggestions were put forward, such as speeding up superior varieties breeding, promotiing self-selected native varieties, improving the current available walnut garden into the scion garden, stepping up the management and technical training of superior variety grafting, in order to promote the development of superior varieties of walnut industry.