沙漠生物结皮对维管植物养分吸收的影响

生物结皮是沙地表面被固定的重要特征,并能够富集养分,通过降水淋溶作用改善沙丘土壤的性质。研究表明,生物结皮层覆盖对植物体的养分元素吸收具有促进作用,但是,由于不同植物养分生理特性的差异及其根系分布深度的不同,不同植物吸收养分时对生物结皮层肥岛效应的敏感程度不同。

The effects of biological crusts on the nutrient absorption of vascular plants

Biological crusts was the main features of moving sanddune being fixed.Biological crusts in desert areas could accumulate nutrients in soil surface,and increase the soil nutrients in deep layer.The research results showed that nutrients levels of the vascular plants growing in the soil with biological crusts were higher compared to the plants growing on uncrusted sand dune soil.At the same time,because the different plants have different physiology features and differenct root growing depth,so different plants absorbing nutrients showed different reaction to the "fertility island" effection of biological crusts in Kubuqi Desert.