Determining Air Entry Value in Peat Substrates

摘要: Insufficient aeration in artificial mixes used for nursery and greenhouse production is commonly reported to be a problem. To diagnose problems, gas relative diffusivity estimates can used. These obtained indirectly from measurements of air entry value, saturated hydraulic conductivity the water desorption curve. In here, rapid tension chamber method measuring proposed. verify applicability method, different potted substrates were inserted into apparatus was extracted substrate by establishing contact with an unsaturated body located outside chamber. The potential within monitored over 5-min period point calculated thereafter. Statistically equal this technique compared values derived table, wide range peat-based substrates.