氮素营养对水稻纹枯病菌生长的影响  

Effects of Nitrogen Sources on Rice Sheath Blight Fungus

作　　者：陈莉[1] 李晓凤 丁克坚[1] 檀根甲[1] 管怀骥[3] 李曙辉[3] 

机构地区：[1]安徽农业大学植保系,合肥230036 [2]亳州市农业局 [3]安徽丰乐农化有限责任公司

出　　处：《安徽农业科学》2002年第2期240-243,共4页Journal of Anhui Agricultural Sciences

摘　　要：结果表明病菌对不同氮源的利用能力不同 ,但趋势基本一致 :在无氮源或氮源浓度水平很低的情况下 ,菌落直径增加快 ,气生菌丝较少 ,无或极少菌核形成 ;随着含氮水平的提高 ,菌落直径增加减缓 ,气生菌丝和形成菌核数量增加。此外 。Effects of nitrogen sources on rice sheath blight fungus (Rhizoctonia solani) were studied. The results showed that the fungus had different growth rate in different media of nitrogen sources. The higher level of nitrogen in medium was, the more numbers of sclerotia formed, nor the growth rate of mycelia. Concentration of nitrogen affected the size of sclerotia, too. Growth rate of mycelia and formation of sclerotia of this fungus in hanlm media of soybean, rice, cotton and maize were also tested. The results indicated that the order of sclertial numbers and pathogenicity were rice>soybean>maize>cotton and soybean>rice >cotton>PSA>maize, respectively. But it had difference among five generations of culture in the same media except PSA.

关 键 词：氮素营养 水稻 纹枯病菌 生长 致病性 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]