| 玉米弯孢菌叶斑病传播的时空动态模型 |
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| 引用本文： | 李海春,傅俊范.玉米弯孢菌叶斑病传播的时空动态模型[J].华中农业大学学报,2004,23(4):406-411. |
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| 作者姓名： | 李海春 傅俊范 |
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| 作者单位： | 沈阳农业大学,沈阳,110161 |
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| 基金项目： | 辽宁省自然科学基金 (9910 10 0 3 0 1)，辽宁省科技攻关招标项目 (992 14 0 0 1，2 0 0 12 14 0 0 1)资助 |
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| 摘 要： | 采用人工接种造成玉米弯孢菌叶斑病时空动态，对其动态数据利用SAS软件构建该病害传播动态的逻辑斯蒂-高斯模型：1/x(1,y)^2=a√t(e^-bt c)e^3(y-dt)^2/t。此模型推导表明，该病在接种发病后1个月、2个月、整个生长季最远传播距离分别为20m，35m，50m；在条件适宜时，玉米弯孢菌叶斑病的传播速度为0．5m／d；菌源中心有100个左右病斑时，预测玉米弯孢菌叶斑病的最佳防治时间是8m处小于12d，14m处小于30d，20m处小于42d。
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| 关 键 词： | 玉米 弯孢菌叶斑病 传播 时空动态模型 |
A Spatio-Temporal Model on Curvularia lunata (Wakker) Boed in Maize |
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| Li Haichun Fu Junfan.A Spatio-Temporal Model on Curvularia lunata (Wakker) Boed in Maize[J].Journal of Huazhong Agricultural University,2004,23(4):406-411. |
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| Authors: | Li Haichun Fu Junfan |
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| Abstract: | The dynamics of spread of the disease is studied by artificial inoculation, which caused by C. lunata in maize. The Lostigical Gauss model,which is 1x 2 (t,y) =at( e -b t +c) e e (y- d t) 2t ,was established with the SAS.During the maize growing season, the deduce results showed that the furthest distance of disease was 20 m during one month, was 35 m during two months, and 50 m during the whole growth season in Shenyang.Under favour conditions, the velocity of spread was 0.5 m per day.The preventive time of C. lunata was before 12 days on the site 8 m from disease source, and was before 30 days on the site 14 m, and before 42 days on the site 20 m, when there was 100 spots in the focus. |
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| Keywords: | Curvularia lunata (Wakker) Boed spread model |
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