University of Natural Resources and Life Sciences, Vienna (BOKU) - Research portal
Gewählte Master / Diploma Thesis:
Sebastian Radlwimmer
(2014):
Phosphoraufnahme, Wurzelmorphologie und Phosphataseausscheidungen von sechs Zwischenfrüchten auf kalkhaltigem Boden unter semi-humiden Bedingungen.
Master / Diploma Thesis - Institut für Ökologischer Landbau (IFÖL),
BOKU-Universität für Bodenkultur,
pp 133.
UB BOKU
obvsg
FullText
- Abstract:
- Phosphorus (P) is an essential element for sustaining life. Today most of the P is used as fertilizer. P is a scarce resource and by this century there could be a lack of P-supply worldwide. Hence there is a need to develop technologies for a more sustainable use of Phosphorus including the improvement of agricultural P-use efficiency. The use of P-efficient cover-crops which are able to transform hardly available soil-P into highly available P-forms is one strategy. The ability of cover crops to take up P is highly dependent on their root length density, root hair length and phosphatase exudations. The aim of this thesis is to contribute to a better understanding of these mechanisms. Therefore six cover-crops Fagopyrum esculentum Moench, Camelina sativa (L.) Crantz, Raphanus sativus L. var. oleiformis Pers., Sinapis alba L., Phacelia tanacetifolia and Vicia sativa were field-grown in spring 2012 on a calcareous soil with a good P-supply under semi-humid conditions. P-uptake, root length density, root hair length and phosphatase-activity were measured and subsequentlty, root surface, root volume as well as root hair cylinder were calculated. Three of the cover-crops (Fagopyrum esculentum Moench, Camelina sativa (L.), Vicia sativa) grew poorly because of bad weather extremes and therefore didn't show as much P-uptake as the other three cover-crops. There was no difference in the P-uptake of the other three cover crops. P-uptake could be explained by root length density, root hair length and root hair cylinder. The highest correlation was found between the root hair cylinder and the P-uptake.
- Beurteilende(r): Friedel Jürgen Kurt