土壤酸碱性

通过对主要酸雨前体物的排放强度与降水酸度的关系，土壤酸碱性与降水酸度的关系，以及气象条件对酸雨影响的分析，探讨了山东省酸雨的成因。

By analyzing the relation between precipitation acidity with the SO_2 discharge intensity and soil acidity , and the impact of meteorological condition to acid rain , the formation mechanism of acid rain in Shandong Province is researched .

合理施肥不仅可改善土壤酸碱性和土壤微环境，增强土壤酶活性和提高土壤微生物数量，还可提高林地土壤肥力，防治印楝人工林地力衰退；

It is concluded that scientifically fertilization not only improves soil pH and soil microenvironment , strengthens soil enzyme activities and increases the quantity of soil microorganisms , but also increases the soil fertility , and prevents the degradation of soil fertility .

本文对不同人工林下黑土的水分状况、土壤结构、酸碱性、有机质含量及腐殖质组成进行了研究。

This paper concerns water situation , soil constitution , PH value , organic matter content and humic composition of chernozem under different artificial forest .

第三部分主要研究不同土壤类型（其中包括土壤的酸碱性，土壤中的营养元素的含量等）对各个树种的营养成分的影响。

The last part of the thesis is to investigate the influence from the different soil type ( pH value and the nutritional elements in the soil ) to the nutritional status of the study plants .