摘要
对6类不同岩性发育的土体上11年生马尾松土壤微生物区系进行研究,结果表明,(1)6类土体上马尾松土壤微生物的组成无明显差异,经鉴定有细菌9个属、真菌6个属和放线菌2个属;(2)6类土体上马尾松土壤微生物的数量之间有明显差异,石英砂岩(198.58×105个)＞玄武岩(117.55×105个)＞第四纪红色黏土(102.43×105个)＞长石石英砂岩(86.98×105个)＞煤系硅质砂页岩(80.24×105个)＞变余砂岩(69.86×105个);而在微生物总量中,则均以细菌的数量占优势,超过90%以上;微生物的数量随季节发生变化,根外土壤与根际土壤之间以及微生物各类群之间的变化呈不同的趋势;(3)各土体之间马尾松土壤微生物根际效应存在着明显差异,其变化范围是4.67～92.96.
The soil microflora of planting eleven years’Masson pine on the soils from six lithological characters were studied. The results showed: (1)The soil microbial composition of Masson pine in the six soils was similar. And bacteria of nine genus, fungi of six genus and actinomyces of two genus were separated and identified.(2)The quantities of soil microbe in the six soils were apparently different, in which the quantities order of soil microbe was: Quartzy sandstone (198.58×10~5)>Basalt (117.55×10~5)>The Quarternary Period red clay (102.43×10~5)>Feldspathic quartzy sandstone (86.98×10~5) >Coal measures siliceous sand-shale (80.24×10~5) >Metamorphic sandstone (69.86×10~5). Bacteria were dominant in the six soils, it were above ninety percent. The quantities of microbe changed with seasons. The changes of quantities of microbe in the non-rhizosphere were different from that in the rhizosphere, and the changes of quantities of bacteria, fungi and actinomyces were different too.(3)Rhizosphere effects of soil microbe of Masson pine in the six soils were apparently different and the changes ranged from 4.67 to 92.96.
出处
《山地农业生物学报》
2005年第3期199-204,共6页
Journal of Mountain Agriculture and Biology
基金
国家"八五"
"九五"攻关课题资助项目(85-018-02-09
96-011-01-01)
贵州省教育厅基金资助项目
关键词
马尾松
土壤微生物
区系
岩性
固氮细菌
根际效应
Masson pine
soil microbe
flora
lithological character
nitrogen-fixing bacteria
rhizosphere effect
