新疆主要水稻生产区稻瘟病发生与降雨之间的关系

Relationship between Occurrence of Rice Blast and Rainfall in Main Rice Producing Areas of Xinjiang

【目的】研究新疆不同水稻种植区水稻稻瘟病的发生情况,为其防治提供科学依据。【方法】采用五点取样法,2016、2017年连续两年调查温宿县、莎车县、察布查尔县、乌鲁木齐市等新疆水稻主要种植区叶瘟病和穗颈瘟发生情况。【结果】不同水稻种植区域稻瘟病发生情况不同,同一水稻种植区域不同地块稻瘟病发生情况也不同;2016年叶瘟病发病程度为莎车县>温宿县>乌鲁木齐>察布查尔县,穗颈瘟发病程度为温宿县>乌鲁木齐>察布查尔县;2017年叶瘟病发病程度为温宿县>乌鲁木齐>莎车县>察布查尔县,穗颈瘟发病程度为温宿县>乌鲁木齐>察布查尔县。水稻叶瘟病和穗颈瘟的发生危害与降雨时间和降雨量显著正相关。【结论】新疆水稻主要种植区均有稻瘟病的发生,其中正播水稻温宿县叶瘟病和穗颈瘟的发生为害均重于察布查尔县和乌鲁木齐。水稻稻瘟病的发生流行与降水时间和降水量呈显著正相关。

【Objective】To study the occurrence of rice blast in different rice growing areas in Xinjiang,and to provide scientific basis for its control.【Method】Five-point sampling method was used to investigate the occurrence of rice leaf blast and ear neck blast in Wensu County,Shache County,Qapqal County and Urumqi in Xinjiang from 2016 to 2017.【Result】The incidence of rice blast in different rice planting areas and different plots of the same rice planting area was different.The incidence degree of leaf blast in 2016 was Shache County >Wenshu County >Urumqi County >Qapqal County,the incidence degree of ear neck blast was Wenshu County >Urumqi >Qapqal County.In 2017,the incidence degree of leaf blast was Wensu County >Urumqi County >Shache County >Qapqal County,and the incidence degree of ear neck blast was Wensu County >Urumqi County >Qapqal County.The occurrence of leaf blast and ear neck blast was positively correlated with rainfall time and rainfall.【Conclusion】Rice blast occurred in the main rice growing areas of Xinjiang.The occurrence of leaf blast and ear neck blast in Wensu County was more serious than that in Qapqal County and Urumqi.The occurrence of rice blast was positively correlated with rainfall time and rainfall.