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采用扩散型指标法和Iwao回归法测定了水稻条纹叶枯病株的空间分布型。结果表明:水稻条纹叶枯病病株田间分布趋于聚集分布,其聚集原因主要是由灰飞虱传毒扩散、病菌本身生物学特性和环境因素引起的。根据空间分布型的参数,建立了理论抽样数模型n2=180.37/-X+19.57和序贯抽样模型TO′(n)=0.3n±0.7615n,确定了最适抽样数和序贯抽样表,提高了调查抽样的效率。
The spatial distribution patterns of rice stripe virus were determined by diffusion index method and Iwao regression method. The results showed that the distribution of rice stripe disease was concentrated in the field, and the main reason for its accumulation was caused by the spread of the SBPH, its biological characteristics and environmental factors. According to the parameters of spatial distribution, the theoretical sampling number model n2 = 180.37 / -X + 19.57 and the sequential sampling model TO ’(n) = 0.3n ± 0.7615n were established, the optimal sampling number and sequential sampling table were established, Improve the efficiency of survey sampling.