原平县同川,是山西省最大产梨区,盛名全国。据记载已有1500多年的栽培历史,全区有梨园4万多亩,栽植各种梨树25万余株,年产1300—1500万公斤,畅销国内外。同川梨农为了增进梨的品质,延长市场供应,春季“挂价”销售,每年将50—60％的梨贮藏至翌年4、5月份,贮藏期长达8— Yuanping County Tongchuan, Shanxi Province is the largest producing pear area, prestigious throughout the country. It has been documented that more than 1500 years of cultivation history, the region has more than 40,000 acres of pear orchard, planting more than 250,000 pear trees, with an annual output of 1300-1500 kg, selling at home and abroad. Tongchuan pear farmers in order to enhance the quality of pear, to extend market supply, spring “hanging price” sales, 50-60% of the pear every year until the next year in April and May, the storage period up to 8-