永定河河滨带土壤机械组成特征及异质性分析

Characteristics of Soil Mechanical Composition and Heterogeneity Analysis Of River Beach in Yongding River

[目的]研究永定河河滨带土壤机械组成特征及异质性分析,为河滨带土壤改良及生态修复提供理论参考。[方法]采用室外定点采样与室内测定分析相结合的方法,研究了永定河河滨带不同地段上下层(0～10、10～20cm)土壤的机械组成。[结果]永定河河滨带土壤机械组成中主要以砾石含量为主,黏粒含量较少,均低于5%。在砾石类组分上,10～20cm含量大于0～10cm含量,沙粒、粉粒则表现出0～10cm含量大于10～20cm含量,黏粒含量上下层间变化不明显。上、中、下游砾石、沙粒、粉粒含量变化幅度较大,而黏粒变化不明显。[结论]应根据土壤状况合理施肥,改良中要注意土壤机械组成恢复的合理结构。

[Objective]The aim was to research characteristics of soil mechanical composition and heterogeneity analysis of river beach in Yongding River and provide theoretical reference for ecological restoration.[Method]Using outdoor fixed-point sampling and indoor analysis method,soil mechanical composition of different sections in the Yong ding River was studied.[Result] The results showed that in Yongding River the soil mechanical composition was content of gravel,clay content was less,but all less than 5%.In components of the gravel class,10-20 cm content was greater than 0-10 cm,sand,silt content showed 0-10 cm content was greater than10-20 cm,between the upper and lower clay content did not change significantly.[Conclusion] Rational fertilization should be based on soil conditions,improvement should pay attention to the reasonable structure of soil mechanical composition.