论文部分内容阅读
为了比较分析盐碱土壤与非盐碱土壤微生物资源抗盐碱性差异,本研究利用含有不同浓度Na2CO3、NaHCO3和pH的培养基对盐碱土壤和非盐碱土壤细菌进行培养计数。结果显示:非盐碱土壤出菌数量随Na2CO3、pH和NaHCO3浓度升高而下降,盐碱土壤细菌出菌数量随着Na2CO3、pH和NaHCO3浓度升高先是升高然后下降,最高值分别出现在200mmol/LNaHCO3、50mmol/LNa2CO3和pH9.0的分离平板上。此外,高Na2CO3、pH和NaHCO3浓度的平板中盐碱土壤出菌数量远高于非盐碱土壤;以上结果可见,耐盐碱细菌资源主要集中分布在盐碱土壤中,在非盐碱土壤中虽有分布,但是仅占有很少一部分。
In order to comparatively analyze the salinity-alkalinity difference of saline-alkali soil and non-saline-alkali soil microbial resources, the culture of saline-alkali soil and non-saline-alkali soil bacteria were counted in medium containing different concentrations of Na2CO3, NaHCO3 and pH. The results showed that the number of bacteria in non-saline-alkali soil decreased with the increase of Na2CO3, pH and NaHCO3 concentration. The number of bacteria in saline-alkali soil increased and then decreased with the increase of Na2CO3, pH and NaHCO3 concentration, 200 mmol / L NaHCO3, 50 mmol / L Na2CO3 and pH 9.0. In addition, the number of bacteria in the saline-alkali soil in the plates with high Na2CO3, pH and NaHCO3 concentrations was much higher than that in the non-saline-alkali soil. The above results showed that the resources of salt-tolerant bacteria were mainly distributed in saline-alkali soil, Although distributed, but only a small part.