| 肥、水、菌对水稻纹枯病发生流行的综合效应 |
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| 引用本文： | 范坤成,康霄文,彭绍裘,邹汉玄,杨先跃,万国安.肥、水、菌对水稻纹枯病发生流行的综合效应[J].植物保护学报,1993,20(2):97-103. |
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| 作者姓名： | 范坤成 康霄文 彭绍裘 邹汉玄 杨先跃 万国安 |
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| 作者单位： | 游南省植物保护研究所, 长沙,游南省植物保护研究所, 长沙,游南省植物保护研究所, 长沙,湖南省常德市农科所植保室, 常德,湖南省常德市农科所植保室, 常德,湖南省常德市农科所植保室, 常德 |
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| 摘 要： | 作者应用通用旋转组合设计方法和植物病害流行学原理,定量分析了田间菌核量(X1)、施氮量(X2)、灌溉方式(X3)对水稻纹枯病初侵染病株率(DP)、水稻蜡熟期病指(DI)、水平扩展速率(Rh)、垂直扩展速率(Rv)的综合效应,并分别组建了数学预报模型。因子解沂结果表明,三因素对DP、DI、Rh、Rv的作用大小分别是:X2 > X1 > X3,X2 > X3 > X1,X2 > X1 > X3,X2 > X3 > X1。其中X2是左右纹枯病发生流行的主导因素,X3主要影响病害垂直扩展速率及蜡熟期病情指数,X1主要影响初侵染数量及水平扩展速率。文中从定量的高度探讨了控氮栽培、适时露田及减少初侵染源对控制病害流行的意义和作用,对各因素的作用方式及作用原理进行了科学的分析。
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| 关 键 词： | 水稻 纹枯病 施氮量 灌溉 |
THE COMPREHENSIVE EFFECT OF NITROGEN, IRRIGATION AND SCLEROTIUM NUMBER ON THE EPIDEMICS OF RICE SHEATH BLIGHT |
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| Fan Kuncheng,Kang Xiaowen,Peng Shaoqiu,Zou Hanxuan,Yang Xianyue and Wan Guoan.THE COMPREHENSIVE EFFECT OF NITROGEN, IRRIGATION AND SCLEROTIUM NUMBER ON THE EPIDEMICS OF RICE SHEATH BLIGHT[J].Acta Phytophylacica Sinica,1993,20(2):97-103. |
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| Authors: | Fan Kuncheng Kang Xiaowen Peng Shaoqiu Zou Hanxuan Yang Xianyue and Wan Guoan |
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| Affiliation: | Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha,Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha,Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha,Changde Municipal Institute of Agricultural Sciences, Changda,Changde Municipal Institute of Agricultural Sciences, Changda and Changde Municipal Institute of Agricultural Sciences, Changda |
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| Abstract: | A general rotation regression design experiment was conducted to study the comprehensive effect of sclerotium number(X1), nitrogen level(X2) and irrigation pattern(X3) on the initial infection rate(DP), disease index in dough stage of rice(DI), and horizontal and vertical expansion rate(Rh and Rv)of rice sheath blight Rizoctonia solani Kuhn. A series of mathematical prediction models were developed. The order of effects of the three factors on DP, DI, Rh and Rv were X2 > X1 > X3, X2 > X3 > X1, X2 > X1 > X3 and X2 > X3 > X1, respectively. Of them, the X2 was the dominant factor determining the epidemic of the disease, and the X3 mainly affected on the vertical expansion rate and the disease index in dough stage,while the X1 mainly affected on the initial infection rate and horizontal expansion rate quantitatively controlling of the reasonable nitrogen amount, the desirable dry-up time and the decrease of initial infection source, and the mechanism of effects of the three factors in disease control were discussed. |
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| Keywords: | rice sheath blight nitrogen irrigation sclerotium number prediction model |
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