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Position: Home > Articles > Research on the Distribution of Sorghum Seedling Disease Journal of Shenyang Agricultural University 1987 (4) 45-48

高粱苗期病害分布型研究初报

作  者:
陈捷;朱有釭
关键词:
随机分布;聚集分布;负二项分布;核心分布;接种势能;高粱苗病
摘  要:
高粱苗期病害主要是由立枯丝核菌(Rhizoctonia solani)AG—5引起的土壤传染病害,该病害的病原菌土下分布状况可以通过病株、病斑的分布型间接地测定。病株为随机分布,而病斑则属于核心分布,但也符合负二项分布.病株分布型反映土内病菌的随机存在,病斑分布型则主要反映了病菌在土内接种势能的不均一分布(聚集分布)。以上结果为在病害调查中确定取样方式与样本大小提供了理论基础。
译  名:
Research on the Distribution of Sorghum Seedling Disease
作  者:
Ghen Jie;Zhu Yougang
关键词:
Poisson distribution;;clustered distribution;;contagious distribution;;negative binomial distribution;;inoculum potential;;sorghum seedling disease
摘  要:
Sorghum seedling disease caused by Rhizoctonia solani is one of the soilborne diseases. The distribution patterns of pathogen in the soil could be determined indirectly with those of infected plants and lesions. The results showed that the distribution of infected plants belonged to a Pois- son distribution, where as that of lesions to both a contagious. distribution and a negative, binomial distribution. Lesion distribution mainly reflected the uneven state of the inoculum potential in the soil. The findings supply a theoretical basis for selecting sampling mode and sample size for the study of the disease.

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