Physical properties of the mor layer in a Scots pine stand. I. Hydraulic conductivity

Abstract

Hydraulic conductivity in the mor layer of a Scots pine (Pinus sylvestris L.) stand was measured in undisturbed samples using the constant-head permeameter and instantaneous-profile method. Saturated hydraulic conductivity (K(s)) averaged 2.9 x 102 m d-1. With a decrease in matric potential (ψ) from -4 kPa to -70 kPa the unsaturated hydraulic conductivity (K(ψ) decreased from 3.1 x 10-3 to 1.1 x 10-8 m d-1. K(s) and K(ψ) were similar to those reported in the literature for low-humified peat. The variation in hydraulic conductivity within a stand of Scots pine at a given matric potential was large, ranging from one to two orders of magnitude.