摘要
Abstract
Different from the major elements,the microelements for plants are mainly provided by soil itself rather than any other ways, the content levels of microelements in the soil are defined by its parent material, in the mean⁃time, the distribution of them in different areas often have significant differences because of the hypergenesis effect. Through geochemical survey of the surface soil in Juye county, distribution pattern and the controlling factors of the microelements can be found, which can help us to understand the influence of hypergenesis on the geochemistry en⁃vironment in this region and even the whole plain of lower reaches of the Yellow River. It is showed that the content of B in soil in this region is slightly lacking, like the background value of the plain, the content of Mo in the soil in this region is far lower than average level in Shandong province and the nation. The anomaly distribution area of Mo matches the distributions of Juye and Yutai formations, soil particle size and texture have a certain effect on the ele⁃ments contents, the content of Mo in sandy soil is lower than in the clay soil, the contents of B in all types of soils are basically equal, no obvious relationship with soil texture was found. Comparing with soil survey data several years ago, it is showed that the hypergenesis has a great impact on the distribution of Mo in short term, the loss of B in soil is very significant, the annual change rates of B and Mo in some areas can be up to 1%. The bioavailabili⁃ty of B and Mo in soil changes periodically, the bioavailable contents are relatively higher in summer than in au⁃tumn, the increase of Mo is especially significant.关键词
土壤/硼/钼/地球化学特征/有效态/周期变化/巨野县Key words
Soil/B/Mo/geochemical characteristics/periodic change/Juye county分类
天文与地球科学
