摘要
通过小区试验和大面积生产田试验,研究不同秸秆还田时间对水稻病虫害的影响。结果表明:稻瘟病、纹枯病和叶鞘腐病的发生与田间孢子捕捉镜检呈正相关,孢子数量越大的品种感染该孢子菌的病害越重,说明直接用携带病稻草和未腐熟的病稻草的水稻秸秆还田,第2年复种水稻发生各类病害的机率和比例都较高。虫害中潜叶蝇产卵期、幼虫危害期与水稻缓苗期基本吻合;负泥虫点查叶片被害指数最高值为1.2%,危害较轻。
The effect of different time of rice straw back to field on rice pest was studied through trial and large production field experiment. The results showed that ： there was positive correlation with microscopic catching spores and the diseases of blast, sheath blight and rice sheath rot. The variety with more spore quantity, the disease was more seriously, that was to say, using the straw which with the desease and not well-composted back to the field, the disease would serious when cropping rice in the second year. The leucoptera flies spawning period and the larvae damage period were in coinsidence with rice seedling come around period. The maximum leaf damage index of oulema oryzae kuwayama was 1.2% ,the damage was not serouse.
出处
《黑龙江农业科学》
2010年第8期75-78,共4页
Heilongjiang Agricultural Sciences
基金
"十一五"国家科技支撑计划资助项目(2007BAD89B05-14)
关键词
水稻
秸秆还田
三病二虫
调查分析
paddy rice
the straw stalk return the field
diagnosis
