在模拟试验条件下,利用中等熟化的生草灰化土,通过按不同比例增加无机肥料的施入量来研究马铃薯、胡萝卜和饲料甜菜中镍、钒、铬的含量变化。查明了,在氮肥与磷钾肥混用时,镍、钒和铬的含量没有发现有增加的危险情况下,施用大剂量的氮肥能明显增加植物中重金属的浓度。从生物学特性上看,马铃薯本身是最善于累积有毒元素的作物,然而,饲料甜 Under simulated conditions, the contents of nickel, vanadium and chromium in potatoes, carrots and fodder beet were studied by increasing the application rates of inorganic fertilizers by medium-maturing grass-soil ash. It was ascertained that the application of a large dose of nitrogen fertilizer could significantly increase the concentration of heavy metals in plants without any increase in the contents of nickel, vanadium and chromium when nitrogen and phosphorus and potassium were mixed. From a biological point of view, the potato itself is the most good at accumulating toxic elements of crops, however, sweet feed