不同碳酸盐岩和土层厚度下土壤微生物数量及生物量的研究——以贵阳市花溪区为例

周 玮; 严 敏; 苏春花; 李 玲; 雷章琴

doi:10.11932/karst20180202

不同碳酸盐岩和土层厚度下土壤微生物数量及生物量的研究——以贵阳市花溪区为例

doi: 10.11932/karst20180202

贵州民族大学化学与生态环境工程学院

基金项目: 贵州省科技厅、贵州民族大学联合基金（黔科合LH字[2014]7382号）

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出版历程
- 发布日期: 2018-04-25

Study on soil microbial quantity and biomass developed from different carbonate-rock and soil thickness：A case study of Huaxi district in Guiyang

College of Chemistry and Eco-environmental Engineering,Guizhou Minzu University

摘要

摘要: 碳酸盐岩发育土壤的厚度变幅大，通过野外挖掘调查，在贵阳市花溪区分薄土、中土及厚土3种土层类型研究喀斯特地区不同土层厚度下微生物数量及生物量，结果表明：随着土层厚度的增加，土壤的细菌、真菌、放线菌及微生物总数逐渐增加；细菌在土壤微生物中占据了绝对优势，在石灰岩及白云岩发育土壤的各土层中分别占88.13%、85.71%、87.36%、85.00%及77.78%;石灰岩发育的土壤从薄土到厚土微生物量碳（C）、氮（N）、磷（P）的含量逐渐增加，分别增加15.15 mg·kg-1、2.82 mg·kg-1、0.18 mg·kg-1，白云岩从薄土到中土微生物量C、N、P的含量分别增加5.13 mg·kg-1、0.39 mg·kg-1、0.10 mg·kg-1；在同等厚度下石灰岩发育的土壤微生物量N、P含量明显低于白云岩发育的土壤，中土中差异最大，分别相差0.90 mg·kg-1和0.21 mg·kg-1，而石灰岩发育土壤的中土中微生物量C的含量则高于白云岩发育的土壤，高17.31 mg·kg-1；探讨相关性,pH值对微生物量C、P有显著影响（p<0.05），全P含量对微生物量P有极显著影响（p<0.01）。
- 土层厚度 /
- 微生物数量 /
- 生物量 /
- 碳酸盐岩 /
- 黔中地区
Abstract: The Huaxi district of Guiyang is located in the center of Guizhou Province. The soil thickness developed from carbonate rocks has a wide range. The soil quality greatly changes with different soil thickness, especially the characteristic of microorganism.Based on field investigation, 3 kinds of soil types, namely thin soil, middle soil and thick soil were studied in Huaxi, Guiyang. The number and biomass of microorganism under different soil thickness in karst area were studied. The results showed that the quantity of bacteria, fungi and antinomies gradually increased with the soil thickness increase. Compared with the fungi and antinomies, bacteria occupy an absolute advantage in soil microbes. They account for 88.13%, 85.71%, 87.36%, 85.00% and 77.78% of soil in different soils thickness developed from limestone and dolomite respectively. In limestone soil, the content of microbial biomass carbon，nitrogen and phosphorus gradually increased from the thin soil to the thick soil, of which the increasing amount were 15.15 mg·kg-1，2.82 mg·kg-1and 0.18 mg·kg-1, respectively. And in dolomite soil, the content of microbial carbon, nitrogen and phosphorus increased from the thin soil to the middle soil, of which the increasing amount were 5.13 mg·kg-1, 0.39 mg·kg-1and 0.10 mg·kg-1, respectively. The content of microbial nitrogen and phosphorus in the soil developed from limestone is significantly higher than that developed from dolomite under the same soil layer, of which the difference in middle soil was the largest, with a difference of 0.90 mg·kg-1and 0.21 mg·kg-1respectively. In comparison, this content of microbial biomass carbon in the soil of limestone is higher than that in the dolomite soil, which is 17.31 mg·kg-1high. The result of correlation analysis showed that the pH value had a significant effect on the microbial biomass carbon and phosphorus (p<0.05), the total phosphorus content has a significant effect on microbial biomass phosphorus（p<0.01）.
- soil thickness /
- microbial quantity /
- microbial biomass /
- carbonate rocks /
- the center of Guizhou

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