本文测定了土壤中的某些矿质元素及栝楼块根中的９种矿质元素含量，并与根腐病的发生情况进行了相应比较。发现磷、锌两种元素含量高的块根，根腐病发病率低；同样，种植在含磷和锌两种矿质元素较高的土壤中，栝楼根腐病的发病率也较低。用不同配方的液体培养试验表明，增磷增锌处理可明显促进栝楼植株的生长和碳水化合物的代谢。因此，合理地施用一定量的磷肥和锌肥，对于减轻根腐病的发生是有益的。 In this paper, the determination of some mineral elements in the soil and the root content of nine mineral elements content, and the occurrence of root rot corresponding comparisons. It was found that the root and rot rots were high in both root and root, and the root rot incidence was also lower in the soil with two mineral elements containing phosphorus and zinc. Liquid culture experiments with different formulations showed that the treatment of increasing phosphorus and zinc could obviously promote the growth of plant and the metabolism of carbohydrates. Therefore, the rational application of a certain amount of phosphate and zinc fertilizer, to reduce the occurrence of root rot is beneficial.