为有效地预防烟草黑胫病在毕节市的流行与发生,在2010-2012年对毕节市烟草黑胫病在不同品种和海拔高度的发生情况进行了调查,并应用形态学方法、分子试验和回接实验对病原菌进行了分类鉴定。结果表明:不同海拔烤烟种植区烟草黑胫病的发...为有效地预防烟草黑胫病在毕节市的流行与发生,在2010-2012年对毕节市烟草黑胫病在不同品种和海拔高度的发生情况进行了调查,并应用形态学方法、分子试验和回接实验对病原菌进行了分类鉴定。结果表明:不同海拔烤烟种植区烟草黑胫病的发病情况差异较大,以毕节市东部地区的黑胫病发生较为普遍,而海拔较高的西部地区发病较少;不同烟草栽培品种对黑胫病的抗性差异较大,感病程度为云烟87>毕纳1号>云烟97;此外,已分离的病原菌鉴定结果为烟草疫霉烟草变种(Phytophthora nicotianae var. nicotianae)。展开更多
Rare earth elements （REEs） are good geological indicators. In order to understand REEs stratigraphic significance, REEs in Late Permian coal measure from Bijie City, western Guizhou Province, China were studied. The...Rare earth elements （REEs） are good geological indicators. In order to understand REEs stratigraphic significance, REEs in Late Permian coal measure from Bijie City, western Guizhou Province, China were studied. The results showed that the contents of both light rare earth element （LREE） and ∑ REE were sharply increased in the boundary between Longtan Formation and Changxing Formation, which resulted from the gyration and discontinuity eruption of Emeishan basalt （REEs source） and frequent transgression-regression during forming coal. The coal measure and strata could be subdivided and correlate, and the sea-level change could be under stood by studying REEs content variation in coal measure.展开更多
文摘为有效地预防烟草黑胫病在毕节市的流行与发生,在2010-2012年对毕节市烟草黑胫病在不同品种和海拔高度的发生情况进行了调查,并应用形态学方法、分子试验和回接实验对病原菌进行了分类鉴定。结果表明:不同海拔烤烟种植区烟草黑胫病的发病情况差异较大,以毕节市东部地区的黑胫病发生较为普遍,而海拔较高的西部地区发病较少;不同烟草栽培品种对黑胫病的抗性差异较大,感病程度为云烟87>毕纳1号>云烟97;此外,已分离的病原菌鉴定结果为烟草疫霉烟草变种(Phytophthora nicotianae var. nicotianae)。
基金Doctor Foundation, Guizhou Provincial Science and Technology Department Fund (200503)
文摘Rare earth elements （REEs） are good geological indicators. In order to understand REEs stratigraphic significance, REEs in Late Permian coal measure from Bijie City, western Guizhou Province, China were studied. The results showed that the contents of both light rare earth element （LREE） and ∑ REE were sharply increased in the boundary between Longtan Formation and Changxing Formation, which resulted from the gyration and discontinuity eruption of Emeishan basalt （REEs source） and frequent transgression-regression during forming coal. The coal measure and strata could be subdivided and correlate, and the sea-level change could be under stood by studying REEs content variation in coal measure.
