摘要
为了探讨南方水稻黑条矮缩病空间分布型及抽样技术,为该病害的准确抽样调查和有效防治提供依据,选取13块稻田逐丛调查资料,应用聚集度指标法、Iwao法和Taylor幂法则,研究了广东西南部南方水稻黑条矮缩病在稻田的空间分布型和抽样技术。结果表明,南方水稻黑条矮缩病病丛空间分布格局随着病丛密度的提高逐步从聚集型向均匀型演变发展。m*-m回归分析表明病丛空间分布的基本成分是个体群,个体间相互吸引,个体群的空间分布型为均匀分布。Taylor幂法则分析表明,南方水稻黑条矮缩病病丛个体的空间分布随着病丛密度的提高而趋向均匀分布。根据南方水稻黑条矮缩病病丛以均匀为主的空间分布特性,田间抽样调查以采用五点或对角线法等较宜。在此基础上提出了理论抽样数:n=(1.96)2/D2(1.287 1/珚x+0.079 9)。
The spatial distribution patterns and sampling of Southern rice black-streaked dwarf disease virus （SRBS- DV） were investigated to provide critical information for protecting rice against SRBSDV effectively and impro- ving sampling accuracy. Based on the collected data from 13 rice paddies in southwestern part of Guangdong Prov- ince, we studied spatial distribution patterns and sampling of SRBSDV by using aggregation indices, parameters of Iwao model and Taylor power law model. Our results showed that the spatial distribution patterns of SRBSDV changed gradually from the aggregated distribution to the uniform distribution with the increase of SRBSDV infec- tion density, m＊ -m regression analysis showed that spatial distribution pattern of SRBSDV was uniform distribu- tion, and its basic element was the individual colony which attracted each other. According to Taylor＇s power law, spatial distribution pattern of the infected plants by SRBSDV was uniform in the rice field with the increase of SRBSDV infection density. Based on this distribution pattern of SRBSDV, the optimal sampling technique was five-point method or diagonal method. We proposed the following theoretical sampling model： n = （1.96）2/D2 （1.287 1/x＋0.079 9）.
出处
《植物保护》
CAS
CSCD
北大核心
2014年第1期131-133,共3页
Plant Protection
基金
广东省科技计划项目(2011B020416001)
