为了防止越冬菠菜在封冻前后和返青期间畦面积水而造成大量死苗,鞍山市郊区宋三台公社城昂卜大队,于1979年将平畦播种越冬菠菜改为“两埂一沟”改良畦播种。在全市越冬菠菜严重减产的情况下,改良畦播种的菠菜平均亩产2,600斤,最高亩产达4,500斤。比平畦菠菜亩产提高32.6％,提早上市5～7天,亩产值350多元。 In order to prevent a large number of dead seedlings of wintering spinach in the area of ​​water before and after freezing and rejuvenation, the city of Aungbu Bu, Song Santai Commune in Anshan Suburb, changed the planted winter spinach in 1979 to a two-ridge-one-furrow improvement sowing. Spinach in the city severely reduced the case of winter spinach, spinach sowing an average of 2,600 pounds per mu, the maximum yield of 4,500 pounds. Than the Pinggu spinach mu yield increased 32.6%, listed 5 to 7 days earlier, more than 350 yuan per mu.