University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Monika Humer
(2015):
FERTILIZING EFFECT OF COVER CROPS AND ALTERNATIVE PHOSPHORUS FERTILIZERS (APF) ON WINTER WHEAT.
Master / Diploma Thesis - Institut für Ökologischer Landbau (IFÖL),
BOKU-Universität für Bodenkultur,
pp 112.
UB BOKU
obvsg
- Abstract:
- Phosphorus (P) is an essential nutrient for plant growth, but is often the limiting factor in organic agriculture. Due to permanent loss of P through yields and a non-appropriate fertilization in organic agriculture, long-term soil fertility is at risk. Closing the open P cycle by recovering P from food production and consumption system, and reusing it as alternative phosphorus fertilizer (APF), but also enhanced P mobilisation from the soil by cultivation of cover crops (CC), are the main objectives. This study was conducted to determine whether green fertilisation with CC and the application of APF influence growing and P uptake of the main crop winter wheat (Triticum aestivum L.). A pot experiment with two different soils, three cover crops (fagopyrum esculentum, phacelia tanacetifolia and trifolium pratense), two APF (sewage sludge ash and digestate) and control treatments, was implemented in a randomised block design. Soil properties like pH and plant available nutrients (Nmin, KCAL, PCAL, PDGT) were investigated. Wheat traits like above ground biomass, grain weight, total P content of grain and straw, were assessed. Results showed a significant influence of the soil type on soil parameters but also on growing traits and P concentrations in winter wheat. In comparison with the calcareous soil, the non-calcareous soil provided at the beginning of the vegetation period more plant available P and K, but fewer N. Aboveground wheat biomass, number of grains and fresh grain weight were significantly higher on the non-calcareous soil. However, P concentration in straw was significantly lower in the non-calcareous soil. Digestate application increased wheat biomass production on the non-calcareous soil significantly. Within CC treatments, No crop and Phacelia treatments showed the highest biomass development. Soil type has a huge influence on P availability for plants. Furthermore it is important to use side specific APF and CC, which fit to the soil properties.
- Beurteilende(r): Friedel Jürgen Kurt
- 1.Mitwirkender: Puschenreiter Markus