蔬菜中硝态氮含量的高低直接影响人畜对硝态氮的摄取问题。我们从施肥角度进行了试验和测定方法的研究。 试验分大田和盆栽,设四个处理如下:不施肥:(CK)、亩施4000斤猪厩肥(M)、亩施尿素40斤(N),亩施4000斤猪厩肥加140斤尿素(MN)。菠菜、小白菜测全株可食部分的硝态氮含量(鲜样)。对大白菜以每层每片叶分别测定。并作了大白菜贮存后 The level of nitrate nitrogen in vegetables directly affects the intake of nitrate nitrogen by humans and animals. We conducted from the fertilizer point of view of the test and determination of the method. Tests were divided into field and potted plants, and the four treatments were as follows: no fertilization: CK, MJ 4,000 kg of manure (M), 40 kg of urea per mu, and 4,000 kg of pig manure plus 140 kg of urea ). Spinach, cabbage whole plant edible part of the nitrate content (fresh sample). On each layer of Chinese cabbage was measured each leaf. And made a cabbage after storage