引言腐植酸类肥料的作用,在于使植物有矿质营养与生长刺激作用,以及有机肥料与无机肥料的效应紧密结合起来,从而大大提高了施肥效果及化肥利用率。但是,随着腐肥的生产和使用不断扩大,需要对腐肥的刺激作用与氮素营养的协调关系进行研究,使之能适应作物对二者的需求,达到费省效宏的目的。为此,我们在“腐肥对甜橙高产优质效应”的研究基础上,从腐肥的氮素营养与刺激强度的协调作用对甜橙的影响进行了探 Introduction The role of humic acid fertilizer is to make plants have mineral nutrition and growth stimulating effect, as well as the effect of organic fertilizer and inorganic fertilizer closely combined, thus greatly improving the fertilization effect and fertilizer utilization. However, with the increasing production and use of rotting fertilizer, the coordination between the stimulating effect of rotting fertilizer and nitrogen nutrition needs to be studied so that it can meet the demand of crops for both and achieve the goal of saving macroeconomics. Therefore, on the basis of the study of “high-quality rotting fertilizer on sweet high-yielding oranges”, we conducted a research on the effect of nitrogen nutrition and stimulating intensity of rotting fertilizer on sweet orange