黑垆土主要分布在填土和褐土以北地区,尤以陕北、晋西北、陇东和陇中分布较广。此外,在内蒙古、宁夏南部亦有分布。长期以来,该土磷肥的施用效果众说纷云。由不增产到获得增产,常有盲目过量施用磷肥而造成浪费的现象发生。因此,如何因地制宜、经济合理地施用磷肥,是当前农业生产中急待解决的一个重要课题。 Black loam soil is mainly distributed in the north of the fill and cinnamon soil, especially in northern Shaanxi, northwestern Shanxi, Longdong and Longzhong. In addition, there are also distributions in southern Ningxia in Inner Mongolia. For a long time, the effect of phosphate fertilizer application said numerous. By not increasing production to obtain increased production, often blind excessive use of phosphate fertilizer and waste caused by the phenomenon. Therefore, how to apply phosphate fertilizer economically and rationally according to local conditions is an urgent issue to be solved urgently in agricultural production.