摘要： 从土壤中分离得到一株产黏性胞外聚合物的菌株N2-2,通过形态观察、生理生化试验和16S rDNA同源性序列分析,鉴定该菌为水拉恩氏菌.将该菌制成液体菌剂喷洒在沙土表面,能够形成致密的结皮,从而显著地提高了沙土的持水能力,并增加幼苗成活率.
关键词:
生物结皮,
水拉恩氏菌,
分类鉴定,
保水
Abstract: A strain N2-2,which synthesizes a kind of viscosity extracellular biopolymer,was isolated from soil at Jinji road. According to the characterist ics of morphology, physiology and biochemistry tests and the comparison of 16S rDNA sequence, strain N2-2 was identified as Rahnella sp.. If N2-2 bacteria culturing solution was sprinkled on the surface of sand, a compact bacteria crust conglutinat ing sand could be formed. The crust can not only improve water retent ion capac-i ty of sand but also increase the survival rate of seedlings.
Key words:
Biological soil crusts,
Rahnella sp.,
Classification and ident ification,
Water retention
中图分类号:
李晓雁, 黄海东, 王燕森, 张学明, 尤丽娟, 金小君, 盛丽梅. 一株水拉恩氏菌的分离鉴定及保水效果研究[J]. 华北农学报, 2009, 24(4): 222-225. doi: 10.7668/hbnxb.2009.04.045.
LI Xiao-yan, HUANG Hai-dong, WANG Yan-sen, ZHANG Xue-ming, YOU Li-juan, JIN Xiao-jun, SHENG Li-mei. Isolation and Identification of a Rahnella Strain and Its Water Retention Capacity[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2009, 24(4): 222-225. doi: 10.7668/hbnxb.2009.04.045.