稻-鸭-鱼共栖生态系统中水稻纹枯病的发生规律与分析  

The Development Rule of Rice Sheath Blight in Rice-duck-fish Complex Ecosystem

作　　者：刘小燕[1] 肖调义[1] 黄璜[2] 刘达[3] 钟蕾[1] 胡立冬[3] 

机构地区：[1]湖南农业大学动物科技学院,长沙410128 [2]湖南农业大学农学院,长沙410128 [3]湖南省桃江县农业局,桃江413400

出　　处：《华中农业大学学报》2006年第2期138-141,共4页Journal of Huazhong Agricultural University

基　　金：国家863项目(863-306-ZD05-3-E);国家自然科学基金项目(39670142);湖南省科技厅项目(OONKYI001)资助

摘　　要：通过田间试验,对稻-鸭-鱼共栖生态系统中水稻纹枯病的发生规律进行了研究并建立了相应的数学模型。结果表明:稻-鸭-鱼共栖生态系统中纹枯病发病高峰期的病株率为16.07%,比对照的病株率76.37%低60.30%,控制效果达79%。对照区、稻-鱼区和稻-鸭-鱼区三者的感染系数分别为σ=212.106 1、σ=23.945 8和σ=8.352 0。A field experiment was conducted to investigate the development rule of rice sheath blight in rice-duck-fish complex ecosystem. A model was established based on experiment data. The results showed that the infection rate of rice sheath blight in rice-duck-fish complex ecosystem was 16. 07 %, lower than control by 60. 30% and its control effectiveness was 79%. The infection coefficients （a） in the control treatment, rice-fish plot and rice-duck-fish plot were 212. 106 1, 23. 945 8 and 8. 352 0, respectively. It suggest that the activities of duck and fish in field result in the low infection rate of rice sheath blight.

关 键 词：稻-鸭-鱼 共栖生态系统 水稻纹枯病 数学模型 

分 类 号：S435.111.42[农业科学—农业昆虫与害虫防治] S476.4[农业科学—植物保护]