不同肥力水平对旱砂地春小麦白粉病发生程度影响的初步研究

对旱砂地春小麦不同肥力条件下白粉病的发生情况进行了初步研究,结果表明:旱地春小麦白粉病的发生和发病后小麦的产量与氮肥的关系比与磷肥的关系密切,氮肥水平越高,旱地春小麦白粉病发生相对越严重,产量相对较低;氮磷互作有利于小麦白粉病的发生,而氮肥75.0kg/hm2 磷肥300.0kg/hm2处理的病情指数较低,产量相对较高,表明合理的氮磷肥配施可降低小麦白粉病病情,提高小麦的产量。

Effect of Different Nitrogenous-phosphatic Fertilizing Methods on the Occurrence of Spring Wheat Powdery Mildew in the Dry Land

The disease index of powdery mildew and yield were preminarily studied on spring wheat in dry land,based on the investigations.The results showed that the disease indexes and yields in the nitrogenous fertilizing fields were more significant than those in the phosphatic fertilizing fields,moreover,the higher the nitrogen was,the more sever disease was,the lower yield was.but the disease indexes and yields in the partialy-high N P cross were closer than those in the normal N P.