欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报 ›› 2002, Vol. ›› Issue (6): 698-700.

• 研究论文 • 上一篇    下一篇

影响水稻稻瘟病菌侵染过程的生态因子研究

丁克坚, 檀根甲, 高智谋, 季伯衡   

  1. 安徽农业大学植保系, 合肥 230036
  • 收稿日期:2000-01-04 修回日期:2000-07-03 出版日期:2002-06-15
  • 通讯作者: 丁克坚,男,1956年生,硕士,教授,主要从事植物病害综合治理研究,发表论文30余篇.Tel:(0551)2823795-3312,E-mail:ding403@ah163.com
  • 基金资助:
    安徽省“九五”科技攻关重大项目(9511027)

Effects of ecological factors on infection process of Pyricularia grisea

DING Kejian, TAN Genjia, GAO Zhimou, JI Boheng   

  1. Department of Plant Protection, Anhui Agricultural University, Hefei 230036
  • Received:2000-01-04 Revised:2000-07-03 Online:2002-06-15

摘要: 通过田间和室内模拟等方法研究了水稻生长阶段、品种抗性、温度、降雨量和施N量等因子对稻瘟病菌侵染过程的影响.结果表明,水稻叶表单位面积病菌孢子附着量与水稻不同生长阶段呈负相关关系;稻瘟病潜育期与温度关系密切,在10℃~33℃范围内,以28℃条件下潜育期最短,小于28℃,大于28℃的潜育期相应延长;病菌孢子侵染比值与水稻生长阶段呈负相关关系;稻叶表病菌孢子附着率在孢子与叶表接触后的5h内,与降水强度和降水持续时间密切相关,5h后影响变小;在一定条件下,稻瘟病扩展性病斑与非扩展性病的比值,扩展性病斑扩展的最大面积与水稻品种抗性和当时病斑所处叶位有关.

Abstract: Rice blast is one of the main rice diseases. In order to discuss the occurrence regularity and improve the veracity of forecasting,the effects of ecological factors on infecting process,such as rice growth period,cultivar resistance,temperature,precipitation,and fertilization of nitrogen,were studied quantitatively. The results showed that adhering conidia on leaves,or ratio of infection was negatively correlative with the growth period of rice. The latent period of Pyricularia grisea was closely related to temperature,and within the range from 10℃ to 33℃,the latent period was the shortest at 28℃. The ratio of conidia adhering on leaves was also closely related to precipitation,especially the intensity and duration of precipitation in the first 5 hours after conidia contacting leaves,and there was no obvious effect after 5 hours. Under certain conditions,the ratio of expansive lesions to non-expansive lesions,the maximum area of expansive lesions,and variety resistance of rice were related to the rank of leaves.

中图分类号: