期刊论文

中文

华中农业大学学报

1000-2421

2006

25

2

138-141

10.3321/j.issn:1000-2421.2006.02.010

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；

本校为第一机构

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=212．1061、σ=23．9458和σ=8．3520。

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 f...