Nitrát kimosódás vizsgálata talajoszlop kísérletben

Tolner László, Kovács Attila

Szent István Egyetem, Talajtani és Agrokémiai Tanszék, H-2103 Páter Károly utca 1. Gödöllő, Hungary

Abstract

Adding nitrogen poor organic matter to soil can change the equilibrium of C/N ratio. As a result of this process the microorganisms degradate the given organic matter which plants can easily uptake from soil’s nitrate source. In one hand, it inhibits nitrate uptake for plants; on the other hand it can prevent nitrate leaching from soil. Contaminated glycerol as a by-product from biodiesel production which is available in increasing amounts could be suitable to influence C/N ratio. Glycerol such as sugars represents an easily accessible source of energy for microorganisms in soil. This means that in case it is applicated in low amount it can have significant effect even in a short time period. Biodiesel by-product contains glycerol and other contaminating materials which can be utilized in soil. One of these materials can be potassium hydroxide used as catalyst during the process and natural matters released from plant seeds. How glycerol influences nitrate leaching was investigated in small sized soil columns. Nitrate leaching was significantly decreased by glycerol treatment.