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明人何孟春云:“今日之盐,煮海者偏东南;煮井、煮卤、种颗者出西北。”①上海地区位于东海之滨,夙檀渔盐之利,在古代也是我国著名的海盐产区之一。早在秦代,现今上海市奉贤县柘林镇一带即“海滨广斥,盐田相望”②。《史记·吴王濞列传》则记载:西汉时“濞则招致天下亡命者益铸钱,煮海水为盐”,其煮盐地点就在今天上海市嘉定县冈身内与冈身平行的盐铁塘。唐代华亭县有徐浦盐场,隶嘉兴盐监;徐浦盐场官舍在华亭县白砂乡。宋元时期,上海盐业生产盛极一时,在现今上海地区的辖境内当时共有江湾、大场、南跄、黄姚、清浦、青村、袁部、下砂、浦东等九处盐场,年产盐量达三千万斤之巨。入明后,由于海岸线的东移及长江主泓道的南摆,致使沿海的海水盐分浓度不断降低,
Ming He Mengchun said: “Today’s salt, cook the sea in the southeast; cooking wells, boiled brine, seeds out of the northwest.” ① Shanghai is located in the East China Sea coast, Tan Tan fishery benefits, is also famous in ancient China One of the sea salt producing areas. As early as the Qin Dynasty, today Fengxian County, Shanghai Zhelin area that is “broad beachfront, Yantian across the sea” ②. “Historical Records of King Wu Biography” is recorded: when the Western Han Dynasty, “When the world is desperate people who benefit from casting money, boiled seawater for salt,” the boiling point of salt in today’s Jiading County, Shanghai Gang body with Gang parallel body salt pond. Huating County in the Tang Dynasty Xupu saltworks, Jiaxing Salt Supervision; Xupu saltworks official pavilion in Baotang Township, Huating County. During the Song and Yuan Dynasties, the production of salt industry in Shanghai was very popular. In the jurisdiction of Shanghai nowadays, there were nine salt fields in Jiangwan, Dachang, Nanxun, Huangyao, Qingpu, Qingcun, Yuanbu, Xiasha and Pudong, Annual output of 30 million kilograms of salt giant. After entering the Ming Dynasty, due to the eastward shift of the coastline and the southward swing of the main road of the Yangtze River, sea salt concentrations in coastal areas continued to decrease,