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Gewählte Publikation:

Schume, H; Hailu, Z; Hailu, T; Sieghardt, M; Godbold, DL.

Spatial analysis of soil water depletion and biomass production in the transition zone between a Eucalyptus camaldulensis stand and a maize field in Ethiopia

AGR FOREST METEOROL. 2022; 320, 108956 FullText FullText_BOKU

Growth depressions in crops grown adjacent to Eucalyptus stands are often reported. The reasons for this observation range from competition for the resources light, nutrients and water to allelopathic effects. We investigated the effect of a Eucalyptus camaldulensis stand on soil water relations of an adjacent field of Zea mays. We used a geostatistical network spanning the Eucalyptus camaldulensis stand and the maize field. We measured changes in soil water storage in high spatial resolution (356 sample points over 3700 m(2)) in weekly to monthly intervals. In addition, an intensive root inventory of the Eucalyptus, covering a depth of 3.1 m, as well as aboveground biomass inventories in both land use forms were carried out. The majority of the fine root biomass of the Eucalyptus (70.5%) was found in the first 60 cm soil depth, which corresponded to the depth of the soil moisture measurements. Soil water depletion in the maize field was greatest up to 20 m from the forest edge, which coincided with the zone of least maize biomass production. In contrast, the water depletion across the first 6 m into the forest was 34% lower than in the border zone on the field side. Growth of the Eucalyptus was greatest at the forest edge, and the increased biomass production of the Eucalyptus balanced the decrease in maize production found in the first 20 m of the field. These changes in spatial growth patterns are explained by intense competition for soil water between the Eucalyptus and the maize.
Autor*innen der BOKU Wien:
Godbold Douglas L.
Schume Helmut
Sieghardt Monika

Find related publications in this database (Keywords)
Eucalyptus-crop interaction
Resource competition
Soil moisture
Root distribution
Biomass inventory

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