22 research outputs found

    Is phosphorus limiting in a mature Eucalyptus woodland? Phosphorus fertilisation stimulates stem growth

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    Aims: Few direct tests of phosphorus (P) limitation on highly-weathered soils have been conducted, especially in mature, native Eucalyptus stands. We tested whether growth in a mature >80-year old stand of Eucalyptus tereticornis in Cumberland Plain Woodland was limited by P, and whether this P-limitation affected leaf photosynthetic capacity. Methods: P was added to trees at the native woodland site at 50 kg ha-1 year-1 in each of 3 years, and stem and leaf responses were measured. Results: Leaf P concentrations before fertilisation were 2], because photosynthesis in elevated [CO2] may become further constrained by required phosphate pools within the photosynthetic apparatus
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