转Bt抗虫棉和土壤营养与红叶茎枯病严重度的关系  

Relationships of transgenic Bt cotton variety and soil nutrients with the severity of red leaf blight

作　　者：张战备[1] 张慧杰[1] 段国琪[1] 王晓民[1] 

机构地区：[1]山西省农业科学院棉花研究所,运城044000

出　　处：《中国生态农业学报》2007年第2期130-132,共3页Chinese Journal of Eco-Agriculture

基　　金：山西省农业科学院资助项目

摘　　要：在棉田土壤营养丰富的条件下,观察了转Bt基因抗虫棉和非抗虫棉对红叶茎枯病的感病性。结果表明,转Bt抗虫棉的发病程度均高于非抗虫棉,前者的发病率、病情指数依次为47．95％～79．45％和12．95～28．25;后者的发病率、病情指数依次为32．12％～55．06％和9．09～15．75;两类品种间的发病率差异显著(P<0．05)。N、P、K不同用量配方施肥试验结果表明,各处理间红叶茎枯病的严重度和皮棉产量均无显著差异(P>0．05),表明增施K肥或N、P、K肥配施,对减轻抗虫棉红叶茎枯病的严重度无明显作用。据此提出了红叶茎枯病减灾的新理论和新方法。The experiment was conducted in 2003 and 2004 to observe the effects of transgenic Bt cotton and soil nutrients on red leaf blight of cotton. The systemic investigations reveal that the severity of red leaf blight of transgenic Bt cotton variety is higher than that of non-Bt cotton variety, the disease incidence and index of transgenic Bt cotton variety are 47.95%--79.45% and 12.95-28.25, respectively and those of non-Bt cotton variety are 32. 12% --55.06% and 9.09--15.75,respectively. Incidence reveals that a significant difference between Bt cotton and non-Bt cotton varieties （ P 〈 0.05 ）. The ginned cotton yield and the severity of red leaf blight present no significant difference （P 〉 0.05） among six treatments of N,P, K fertilizer combination. This result shows no significant effects of N, P,K fertilizer on reducing the severity of disease. On the basis of the results,a new theory and some new methods are discussed for the disease control.

关 键 词：转BT抗虫棉 土壤营养 红叶茎枯病 

分 类 号：S562[农业科学—作物学]