施肥及白菜叶位对白菜黑斑病流行的影响  

Influence of Appling Fertilizer and Leaf Position to the Epidemic of Cabbage Black Spot Disease Caused by Alternaria brassicae

作　　者：马海霞[1,2] 刘影[2,3] 杨毅[2] 付晓云 杨信东[2,5] 

机构地区：[1]中国热带农业科学院热带生物技术研究所,海南海口571101 [2]吉林农业大学农学院,吉林长春130118 [3]吉林省农业科学院植物保护研究所,吉林公主岭136100 [4]德惠市种子管理站,吉林德惠130300 [5]吉林农业大学发展学院,吉林长春130600

出　　处：《北方园艺》2012年第13期142-144,共3页Northern Horticulture

基　　金：中华农业科教基金资助项目(98-20-12)

摘　　要：以长春地区的掰帮菜白菜为试材,研究了施肥及白菜叶位对白菜黑斑病流行的影响。结果表明:钾、磷、氮(NH4+)肥均可降低白菜黑斑病的侵染和孢子产生,钾肥对提高白菜抗病力(降低病菌侵染和孢子产生)的效果好于磷、氮(NH4+)肥;好的营养状况能够显著降低白菜黑斑病的侵染及病斑扩展;病菌最先侵染老叶,随着叶位升高,白菜抗黑斑病菌侵染的能力增强,新生叶比老叶有更高的抵抗病菌侵染的能力;老叶上的病斑产生孢子的能力要大大高于新叶的病斑。With Baibang Chinese cabbage as experimental materials,the effects of fertilizer and position of leaf with the epidemic of cabbage black spot disease caused by Alternaria brassicae were studied in Changchun.The results showed that chemical fertilizers could reduce the spore infection and spore production,and potassium was better than nitrogen（NH4＋） and phosphate.The good nutritional condition could obviously reduce the spore infection and extension of lesion.A.brassicaeinfected older leaves firstly,the resistance capacity of cabbage from A.brassicae enhanced with the elevation of the leaf position.The new leaves had higher resistance capacity fromA.brassicaeinfection than older leaves.Spore production capacity of older leaves was higher than the new leaves.

关 键 词：白菜 黑斑病菌 病害流行 施肥 

分 类 号：S634.606.2[农业科学—蔬菜学]