Calcium carbide dust pollutes environment seriously and in addition , the question of storage restricted the development of the corporation . to settle the question about calcium carbide dust is imperative under the situations . the text expatiated the application of calcium carbide ash in highway building . the article includes five aspects : 1 . application of lime soil 本文主要阐述电石灰在公路工程中的应用，为说明问题，全文共分五个部分，即一、石灰土在公路工程中的应用；二、二灰土的应用；三、石灰粉煤灰稳定级配碎石；四、电石灰应用；五、对沧州地区柔性路面结构组合的建议。
The paper made an ecological anatomy , a cultivation experiment on the lime - soil habtat and an analysis on the diurnal variation of photosynthetic an transpiration rate from three aspects of morphology , transplantation , physiology . the conclusion is that : ( 1 ) from the viewpoint of morphological anatomy , it has typical xerophyte structure such as strong root system , small leaf area , dense floss under the leaf surface , high stomatal density , the small opening degree , developed vessels and palisade tissues etc 从形态学、栽培学和生理学三方面对迷迭香进行生态解剖、石灰土上的栽培实验以及光合蒸腾速率日进程的分析，得出以下结论： ( 1 )在形态解剖上：迷迭香具有发达的根系，较小的叶面积，叶片下表面密被绒毛，气孔密度大，开度小，厚的角质层和发育良好的木质部和栅栏组织等典型的旱生结构。
Therefore , rosmarinus officinalis has the water stress capacity , and its main means of adapting to drought is to decrease water consumption and transpiration ; not only can it grow in lime - soil habitat of guizhou karst , but it can grow very well in the soil with the water content between 15 % to 70 % 因此，迷迭香具有一定耐水分胁迫的能力，其适应干旱的主要方式和途径是低耗水和减少蒸腾失水，在贵州喀斯特石灰土生境中不仅能够生长，而且在土壤相对含水量为15 - 70时长势良好。
