摘要
在人工气候室内进行了施氮量对稻瘟侵染过程主要环节影响的定量试验。结果表明,施氮量对稻瘟菌侵染、病斑扩展及产孢均有不同程度的影响,其中,侵染几率所受影响最大,其次为病斑扩展及产孢,潜育期基本上不受影响。试验还发现,稻瘟侵染、产孢和病斑扩展各组分对氮量均有最适要求,当施氮量超出它们的最适范围后,将不再有利于各组分的发展。以上结果均用数学模型进行了描述,揭示了侵染循环各组分与施氮量间关系及警戒氮量在稻瘟流行学上的意义。
Quantitative experiment on the effect of applying nitrogenous ferti-lizer on the infection cycle of rice leaf blast was performed in thechamber.The results implied that amount of N fertilizer could influencethe infection,lesion expansion and sporulation of the blast in varyingdegrees,and there would be an optimum amount of N fertilizer for eachof these components,beyond which the pathogenecity components couldnot increase.Models for the relationship between these components andamount of the N fertilizer were suggested.
出处
《植物保护学报》
CAS
CSCD
北大核心
1991年第1期57-60,共4页
Journal of Plant Protection
关键词
水稻叶瘟菌
侵染循环
施氮量
rice leaf blast
infection cycle
nitrogenous fertilizer
