水稻潜根线虫侵染与水稻生长和产量损失的关系  

THE RELATIONSHIPS BETWEEN THE INFECTION OF Hirschmanniella oryzae , RICE GROWTH AND YIELD LOSS

作　　者：殷友琴[1] 周慧娟[1] 高学彪[1] 冯志新[1] 

机构地区：[1]华南农业大学线虫研究室

出　　处：《华南农业大学学报》1996年第4期14-17,共4页Journal of South China Agricultural University

摘　　要：在网室接种不同梯度的水稻潜根线虫作盆栽试验，结果表明，在一定范围内稻根中的虫口密度与接种虫量呈显著正相关；水稻整株鲜重、根重、有效分蘖数、千粒重及产量均随接种虫量的增加而递减。方差分析表明，接种５００头处理的有效分蘖数与对照的有效分蘖数有显著差异。有效分蘖数达到显著差异时对应的分蘖盛末期稻根中的虫口密度为每克根有１５头潜根线虫，可以作为生产上的防治指标之一。水稻潜根线虫明显降低水稻产量。The results of pot experiments in which Hirschmanniella oryzae was inoculated in rice roots in various population densities showed that the population densities of H. oryzae in rice roots were directly proportional to the initial population density inoculated. But the fresh rice plant mass, the fresh root mass, the number of effective tillers, the one thousand-grains weight and the yield of rice were inversely proportional to that of the initial population density of H. oryzae . The injury level of H. oryxae on rice was 15 nematodes in one gram of rice roots at the end of the maximum tillering stage and could be applied as economic threshhold in the control of H. oryxae with several cultivation measures. The yield of rice was significantly was reduced by H. oryxae and was inversely proportional to the population density of H. oryzae in rice roots in the later tillering stage.

关 键 词：水稻 潜根线虫 产量损失 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]