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稻瘟病的叶瘟病株、病斑和穗颈瘟白穗的空间分布型都是聚集的。Taylor幂法则和 Jwao 集聚格局分析比其它扩散型指标,更能够说明病害的生态特征。稻瘟病叶瘟的病丛率(x)与病株率(y)的关系为 y=0.5632e~(0.0451x),穗颈瘟白穗丛率(x)和白穗株率(y)的关系为 y=0.8957e~(0.03786x),都呈极显著相关,有利于调查方法的简化。负二项理论抽样,将原公式简化,其抽样数可依 S~2=a(?)~b 代替 k 值作用,它随平均数而变化,计算较方便。
Blast disease of the rice blast disease, panicle disease and spike neck white spike spatial distribution are gathered. Taylor power law and Jwao agglomeration pattern analysis are more capable of describing the ecological characteristics of the disease than other diffusive indicators. The relationship between disease rate (x) and disease rate (y) of rice blast disease was y = 0.5632e ~ (0.0451x), panicle blast rate (x) and white ear plant rate (y) The relationship was y = 0.8957e ~ (0.03786x), which showed extremely significant correlation, which was conducive to the simplification of survey methods. Negative two theory sampling, the original formula is simplified, the number of samples according to S ~ 2 = a (?) ~ B instead of k value, which changes with the average, the calculation more convenient.