摘要
用聚集度指数 (kcaIδ 和 M / x) ,以及Iwao M/ x回归分析法和Taylor幂法等测试方法研究了水稻节瘤病病株在稻田的空间分布型。结果为 ,水稻节瘤病病株的分布属聚集分布 ,分布的基本成分是个体群。据空间分布信息 ,用双对角线抽样 ,以 10丛为一样方 ,取 18个样方用于水稻节瘤病调查 ,其准确度达
The methods of indices aggregation(k Ca I δ and /?) Iwao s /? regression analysis and Taylor′s power were used to study spatial pattern of the rice node tumor disease All indices indicated that the distribution of the node tumor disease plant was an aggregation pattern Distribution of colonies was aggregated Based on the information of spatial distribution of rice node tumor disease plant in rice field,a suitable sampling method,seemed to be more practicable,was double diagonal line (10 clump plants quadrate sample) and statistical examination showed that 18 quadrate samples (180 plants) per field gave sufficiently high degree of accuracy(>79%)
出处
《西南农业学报》
CSCD
2002年第2期51-53,共3页
Southwest China Journal of Agricultural Sciences
基金
广西教育厅资助项目 (桂教科研 [2 0 0 0 ]第 3 92号 )
关键词
病株
水稻
节瘤病
空间分布型
抽样方法
rice node tumor disease
spatial pattern
sampling method
