植烟土壤硫化细菌与反硫化细菌分布特点研究
Chinese Tobacco Science(2011)
Abstract
利用选择性培养基,采用最大或然数法对其计数,对云南大理州主要植烟区土壤硫化细菌及反硫化细菌进行分离,以了解硫化细菌和反硫化细菌在烟草不同生长时期的动态变化。结果表明,剑川甸南、下庄、程官和弥渡4个烤烟主产区硫化细菌和反硫化细菌根际土细菌数大于田间土,硫化细菌根际与田间土之比为R:S=6~10:1,反硫化细菌的根土比约R:S=2.5~3.5:1,弥渡烤烟区细菌数量要明显大于其他3个烤烟区。永平和南涧地区田间土硫化细菌数比根际要高。土壤pH与土壤细菌含量呈负相关性,对反硫化细菌的影响要远远大于硫化细菌;根际硫化细菌与田间土硫化细菌呈显著正相关性r=1.00,根际与田间土反硫化细菌呈显著正相关性r=0.879。硫化细菌在成熟期含量较高,反硫化细菌数在团棵期含量较高。
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Key words
anti-sulfur bacteria,sulfur bacteria,tobacco,correlation,tobacco planting soil
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