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小麦条锈病典型越夏区孢子传输的数值模拟

荣飞1;翟保平1;姜玉英2   

  1. 1南京农业大学昆虫学系, 南京 210095; 2全国农业技术推广服务中心病虫测报处, 北京 100026
  • 收稿日期:2008-03-27 修回日期:1900-01-01 出版日期:2008-12-10 发布日期:2008-12-10

Numerical simulation of urediniospore transmission of wheat stripe rust in its typical over-summering areas.

RONG Fei1;ZHAI Bao-ping1;JIANG Yu-ying2   

  1. 1Department of Entomology; Nanjing Agricultural University, Nanjing 210095, China; 2Division of Pest Forecasting, NATESC, Beijing 100026, China
  • Received:2008-03-27 Revised:1900-01-01 Online:2008-12-10 Published:2008-12-10

摘要: 在阿坝和陇南越夏区使用HYSPLIT-4沉降模型对条锈病菌孢子进行连续多年的数值模拟,并使用ArcGIS 9进行叠加计算,得出越夏区孢子传播的沉降概率分布。结果表明:在风场合适的条件下,陇南越夏区的条锈病孢子可以传播到黄淮冬麦区、长江中下游及华北平原冬麦区的部分地区影响其秋苗感病,而阿坝越夏区对其影响甚微;根据模拟结果推测陇南越夏区的条锈病菌可对关中地区的秋苗发病有直接影响;阿坝和陇南地区均可以为四川盆地和陕西南部冬繁区提供冬繁菌源;阿坝和陇南越夏区之间可以进行很好的菌源交流,进一步证明了前人关于西北和川西北越夏区连成一片的论断。

关键词: 土壤氧化还原酶, 动力学, 特征

Abstract: HYSPLIT-4 deposition model was employed to numerically simulate the 10 years urediniospore transmission of wheat stripe rust in its Aba and Longnan over-summering areas. The data were processed by the method of overlay calculation with ArcGIS 9, and thus, the probability distribution of the urediniospore deposition could be predicted. The results showed that if wind fields were favorable, the urediniospore in Longnan area could transmit to the winter wheat cropping areas in parts of Huanghuai region, middle and lower Yangtze River basin, and North China Plain, and would affect the rust infection on the autumn seedlings there, whereas the urediniospore transmission from Aba area had little influence on the infection. Based on the results of numerical simulation, it was supposed that the over-summering area of wheat stripe rust in Longnan could determine the infection of autumn seedlings in Guanzhong area directly. Both Aba and Longnan areas could provide a great deal of urediniospore to the winter propagating area of Sichuan basin and southern Shanxi. There was a frequent transmission of wheat stripe rust urediniospore between Aba and Longnan areas. Our study further confirmed the previous judgment about the continuum of the over-summering area of wheat stripe rust pathogen in Northwest China and Northwest Sichuan.

Key words: Soil oxidoreductase, Kinetics, Properties