摘要
试验选用生育期相近的4个水稻品种(津原45、津原11、津原17和花育409),通过等比例混播,研究水稻的遗传多样性对主要病虫害和天敌的发生以及产量的影响,在此基础上分析了各个参数之间的相关性。结果表明,水稻品种混播显著降低了褐飞虱Nilaparvata lugens Stl的种群密度,提高了捕食性蜘蛛的种群密度。混播比单播均值增产2.5%,比津原45单播增产17.3%。相关性分析表明,不同品种的产量因子与害虫及天敌的发生量之间相关性不同,津原45和津原11单播处理中各参数间相关性显著,而在混播处理中不显著。本试验支持了农业生物多样性对病虫害调控作用的理论,为水稻的安全生产提供了技术依据。
The field experiment was conducted to evaluate the effects of mixed cropping of paddy rice varieties on insect pests and their natural enemies,and rice yield through equal-proportion-mixed cropping of four varieties（Jinyuan 45,Jinyuan11,Jinyuan17,and Huayu 409） with close growth period,and to assess the relationship between pests,natural enemies and rice yield.Results showed that mixed cropping decreased the population density of brown rice planthopper（Nilaparvata lugens Stl） and increased the population density of predacious spiders significantly.The yield of the mixed cropping was increased by 2.5% and 17.3% in comparison to those of monoculture average and Jinyuan 45,respectively.Significant correlations existed between insect pests,their natural enemies and rice yield for monoculture of Jinyuan 45 or Jinyuan11,but no correlations were detected in the mixture cropping.The present data provide evidence for the notion that agro-biodiversity plays a role in pest regulation and provide cultivation technique for safety production of paddy rice.
出处
《中国生物防治学报》
CSCD
北大核心
2012年第2期212-219,共8页
Chinese Journal of Biological Control
基金
国家公益性行业(农业)科研专项(200803032)
关键词
水稻
混播
病虫害
天敌
产量
rice
mixed cropping
plant diseases and insect pests
natural enemies
yield
