Potenzial von Biokohle und Kompost auf einem nährstoffarmen sommertrockenen Standort in Brandenburg

Hardy Schulz1, Bruno Glaser2
1 Bodenphysik/ Bodenbiogeochemie, Universitaet Bayreuth/ Universitaet Halle
2 Bodenbiogeochemie, MLU Halle-Wittenberg

V 1.2 in Neueste wissenschaftliche Ergebnisse

08.07.2010, 14:05-14:25, H 8, GEO

Though nowadays net flux of carbon dioxide between agriculture and atmosphere is estimated to be approximately balanced, unsustainable agriculture caused the loss of about 50 Pg C (Paustian 1998; Lal 2004). It is nitrous oxide from fertilization and animal manure, accounting for about 90% of the agricultural emissions together with methane from paddy fields and animal (Ruminantia) husbandry (IPCC 2007). Summed up, agriculture is responsible for about 25% of the CO2, 50% of the CH4 and 70% of the N2O accounting to the global anthropogenic emissions (Hutchinson 2007). In the ancient technique of Terra preta do Indio we have possibly found a tool for both mitigating climate change and sustainably increasing productivity of agriculture (Glaser 2007). Modern correspondents of this Amazonian phenomenon, where aboriginal cultures boosted soil productivity of highly weathered tropical soils mainly through the incorporation of charcoal into the soil body, are referred to as Biochar management systems (Novotny 2009, Glaser 2007, Özçimen2004, Lehmann 2003). On a very poor sandy soil in eastern Brandenburg/ Germany we started a field trial in 2009 to examine the consequences of a Biochar management system on soil conditions and plant growth. On one hectare agricultural land we established five different set ups (including control, pure compost, Biochar+compost in three different ratios). Regular measurements of soil water conditions were conducted together with supply of soil nutrients and plant growth parameters for two growth periods (maize [Zea mays L.] and cowpea [Vigna unguiculata L.]). The effects of the Biochar-Compost-Mixes were diverse but significant results can nevertheless be presented.

Letzte Änderung 05.07.2010