黄河南徙对徐州地区农业土壤肥力的影响

Influence of Southern-Rechanneled Yellow River to the Fertility of Xuzhou Arable Farming Land

以徐州地区历史上3个未受黄河泛滥影响和10个受黄河泛滥影响的农业耕作区为研究对象,测定各个样点土壤机械组成和有机质、氮、磷、钾、pH值、阳离子交换量等理化参数,研究了黄河南徙对徐州地区土壤肥力的影响。结果表明:土壤的机械组成影响着可耕性与保肥性,非黄泛区表层土与黄泛区表层土虽都为壤质沙土,但后者细沙含量较多,质地略细于前者,深层土也显现出同样的规律;非黄泛区无论是表层土壤还是深层区土壤有机质、全氮含量、阳离子交换量均显著大于黄泛区;非黄泛区表层及深层土壤pH值均显中性,而黄泛区各层土壤均显碱性。

The paper took the arable farming soil respectively from three never-flooded and ten ever-flooded Yellow River basin areas in Xuzhou to identify each sample＇smechanic composition as well as to define their physical and chemical parameters such as the organic matters, nitrogen, phos- phorus, potassium, pH value, etc. , and then compare in turn the collected data with SPSS 16.0. The results show that the mechanical composition of soil affect its arability and crop producing power; even though the surface soils of non-flooded areas and flooded area are loamy sand ,the latter is mostly composed of sand, which is much finer than that of the former, and the deep soil shows the same pattern when compared with each other; the organic matter, total nitrogen, cation exchange capacity in the surface and deep soil of the non-flooded area is significantly greater than those in the flooded area ; pH value of the the surface and deep soils of the non-flooded area is neutral, while pH value in all layers of soils of the flooded areas is alkaline.