N·K营养与N·K平衡对烤烟野火病发生的影响  

Influence of N and K Concentration and N and K Balance on Wild Fire Disease of Tobacco Leaf

作　　者：董艳[1] 董坤[1] 范茂攀[1] 赵平[1] 林克惠[1] 

机构地区：[1]云南农业大学资源与环境学院,云南昆明650201

出　　处：《安徽农业科学》2007年第2期454-455,共2页Journal of Anhui Agricultural Sciences

基　　金：云南省教育厅资助项目(03Y397B)

摘　　要：研究了云南中部地区烤烟中部叶片旺长后期(移栽后70～75d)N、K营养及N、K平衡对田间烤烟野火病发生的影响。结果表明:N含量高时(N>4%),病害发生严重,但发病严重程度取决于K的含量,K素过高和过低都增加了烤烟的感病率;K含量过低(K<2%),会降低烤烟的抗病性;烟叶N/K比失调,会影响烟株的生长发育,使烤烟对病害的抵抗能力降低。The relationship among N and K concentration and N and K balance in middle leaf of tobacco plant and wild fire disease were investigated in the central Yunnan. The results showed that：（1） when N concentration 〉 4 %, the disease was serious, but its level was decided by the concentration of K, and too high or too low K concentration, the disease incidence and disease index of wild fire were increased; （2）the resistance of tobacco to wild fire disease was reduced when K concentration 〈 2 %;（3 ）if N/K ration was not balance, over high or over low, normal growth of tobacco plant might be influenced and the resistance of tobacco to disease was reduced.

关 键 词：烤烟 N、K营养 N、K平衡 野火病 

分 类 号：S143[农业科学—肥料学]