小麦/蚕豆间作条件下硅对小麦白粉病发生的影响  

Effect of Silicon Nutrition on the Occurrence of Blumeria Graminis under the Condition of Wheat and Broad Bean Intercropped System

作　　者：肖靖秀[1] 曾广飞[1] 汤利[1] 郑毅[1] 

机构地区：[1]云南农业大学资源与环境学院,昆明650201

出　　处：《中国农学通报》2011年第1期229-233,共5页Chinese Agricultural Science Bulletin

基　　金：云南省教育厅基金项目(A3006464);973计划前期专项(2008CB117011);国家自然科学基金(30860157;30460061);公益性行业(农业)科研专项(200803030)

摘　　要：农作物间作可以持续降低病虫害发生,但间作条件下硅对病害发生的影响研究较少。此文通过砂培、水培试验,研究比较了单作和间作条件下施硅对小麦氮养分吸收及小麦白粉病发生的影响。试验结果表明：间作平均降低小麦白粉病9.8%。施用硅肥显著降低小麦白粉病的发病率和严重程度,单作条件下施硅降低小麦白粉病发病率2.2%~35.1%,间作条件下降低3.4%~15%。水培条件下,施用硅肥没有提高小麦生物量的趋势,对小麦氮含量无影响。砂培条件下,施硅增加单作小麦生物量14.2%,增加间作小麦生物量57.1%。施硅降低单作小麦氮含量10.4%,而增加间作小麦氮含量5.5%。Rational crops ’ intercropping can decrease occurrence of pests and diseases, but rarely study were carried out about effect of silicon nutrition on diseases. Pot experiments of sandy culture and water culture were conducted to study the effect of silicon nutrition on nitrogen uptake by wheat and occurrence of Blumeria Graminis under the condition of wheat and broad bean intercropped. The results showed that wheat and broad bean intercropped decreased the occurrence of Blumeria Graminis. Applied silicon nutrition decreased the occurrence and severity of Blumeria Graminis. Compared with Si-level, applied silicon nutrition average decreased occurrence of Blumeria Graminis 2.2%-35.1% in wheat sole cropped, while average decreased occurrence of Blumeria Graminis 3.4%-15% in intercropped condition. When applied silicon nutrition, wheat biomass yield was not increased compared with Si-level in sole and intercropped system by water culture; while biomass yield increased 14.2% in sole cropped system and increased 57.1% in intercropped system by sandy culture. There was no effect of applied silicon and intercropped on wheat nitrogen content by water culture. Wheat and broad bean intercropped by sandy culture, applied silicon nutrition decreased wheat nitrogen content 10.4% in sole cropped system and increased nitrogen content 5.5% in intercropped system.

关 键 词：小麦 蚕豆 间作 硅 小麦白粉病 

分 类 号：S14[农业科学—肥料学]