通过对西洋参进行氮肥施用的田间试验.结果指出:肥料种类以磷酸二铵为佳,产量最高,比对照提高30.5%,根腐病的发病很轻;每年于出苗展叶定型后和初果期各施一次为宜;若叶面喷施即以尿素最好,根比对照增重27.6%。皂甙含量有随氮肥施用次数增加而提高的趋势。

In field cultivation of Panax quinquefolium,different processes for the application of nitrogen fertilizers were tried. It was found that the best type of nitrogen fertilizer was (NH4)2HPO4,which resulted in an in creased yield of 30. 5% over that of the control. Root rot was of rare occurrence. The higher vield can be ob tained by applying the fertilizer during leaf full expansion stage and early fruit stage once every y6ar. In foliar spray experiment,urea was found to produce the best effect which resulted in a yield 27. 6% higher than that of the control,and the content of ginsenoside also increased with increased time of fertilizer application.