菠菜是喜硝作物,南京农业大学农化系所进行的水培试验表明,单施硝态氮可明显地提高菠菜产量,但菠菜中硝酸盐和卓酸含量较施铵态氮和尿素氮的要高,水溶性糖和维生素C的含量却较施铵态氮、尿素氮的低。为获得高产菠菜,并降低菠菜中硝酸盐和草酸含量,增加糖和维生素C的积累量,所以对菠 Spinach is like a nitrate crop, and the hydroponics experiments conducted by Department of Agronomy, Nanjing Agricultural University showed that the single application of nitrate nitrogen can obviously increase the yield of spinach, but the content of nitrate and acid in spinach is higher than that of ammonium and urea nitrogen To high, water-soluble sugar and vitamin C content than the ammonium nitrogen, urea nitrogen low. In order to obtain high-yield spinach, and reduce nitrate and oxalic acid content in spinach, increase the accumulation of sugar and vitamin C, so the spinach