Scale Characteristics and Economic Effect of Walnut Industry Development in Shangluo City of Qinba Mountain Area

Based on experience data of walnut industry development in Shangluo from 2013 to 2018 in Qinba mountain area，scale characteristics of walnut industry in Shangluo from two dimensions of industrial input concentration and output concentration were evaluated，its contribution to economic growth from two dimensions of industrial income dependence and contribution rate was also evaluated，and OLS regression model was used to analyze driving effect of walnut industry on GDP.Results showed that scale characteristics and economic effects of walnut industry in Shangluo were significant，showing a trend of increasing year by year.Combined with current situation of walnut industry in Shangluo city，policy suggestions were put forwand from three aspects：grasping policy opportunities，accelerating connotation development and expanding brand advantages.