栝楼根腐病与某些矿质元素营养的关系

MONGOLIAN SNAKEGOURD ROOT ROT IN RELATION TO THE NUTRITION OF SOME MINERAL ELEMENTS

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。

Nine mineral elements in root tubers of Mongolian snakegourd and the soil were analysed. The results were compared with the incidence of the disease, which indicates that theincidence of the disease was low when the plant was grown on the soil with a high level ofphosphorous (P) and zinc (Zn), and when the root tuber had high level of P and Zn. As theplant got older, the contents of P and Zn in the root tuber was lower. Experiment with solution culture indicated that the solution by adding P or Zn could improve the plant growthand the metabolism of carbohydrate.