平湖县是浙江省紫云英主要留种区之一。根据1953～1962年的統計,十年中,平均每年留种面积达5.4万亩,平均亩产达74.5斤。由于留种面积較大,单位面积产量又較高,因而每年都能大量外調,支援省內外各地所需的綠肥种子,同时,也增加了本地农民的經济收入。 Pinghu County is one of the main remaining areas for Zhejiang Province. According to statistics from 1953 to 1962, ten years, the average annual area of ​​540,000 mu, with an average yield of 74.5 kg per mu. Due to the large area for planting and the high yield per unit area, a large number of extroversions were made every year to support the green manure needed in all parts of the province and beyond while at the same time increasing the economic income of local peasants.