Journal article
Effects of P fertilisation on productivity and nutrient accumulation in a Eucalyptus grandis × E. urophylla plantation in southern China
Forest Ecology and Management, Vol.161(1-3), pp.89-100
2002
Abstract
Phosphorus deficiency is the main constraint to productivity of eucalypt plantations in southern China, but knowledge of P application on nutrient utilisation by eucalypt plantations in China is limited. This study, therefore, investigates the impacts of P fertiliser rate on biomass production, nutrient uptake, partition and use, efficiency of a 75-month-old clonal plantation of Eucalyptus grandis x E. urophylla on a high P sorption oxisol near Kaiping, southern China. Results show that P application significantly increased tree growth, biomass production, N, P and K uptake, and decreased understorey biomass and litter dry weight. Application of 208 kg P ha-1 was adequate for tree growth. The proportion of stem-wood was increased and the proportion of root biomass was decreased as the quantity of phosphorus applied increased. The application of P also increased the proportion of tree biomass:total biomass of tree, understorey and litter. The N and K use efficiencies for tree biomass and stem-wood production increased with P supply. The P use efficiency was highest in the 13 kg P ha-1 treatment, and decreased at higher rates of P. The P recovery by tree uptake was between 7.6 and 25.3% and decreased as the quantity of P applied increased. It is suggested that harvest residue, as well as understorey and litter should be retained on the site after harvest so that the accumulated P in these components following P fertilisation can benefit tree growth in the next rotation. The study also indicated that N is likely to limit productivity after P due to the high uptake of N by the understorey.
Details
- Title
- Effects of P fertilisation on productivity and nutrient accumulation in a Eucalyptus grandis × E. urophylla plantation in southern China
- Authors/Creators
- D. Xu (Author/Creator)B. Dell (Author/Creator)N. Malajczuk (Author/Creator)M. Gong (Author/Creator)
- Publication Details
- Forest Ecology and Management, Vol.161(1-3), pp.89-100
- Publisher
- Elsevier BV
- Identifiers
- 991005543465607891
- Copyright
- © 2002 Elsevier Science B.V.
- Murdoch Affiliation
- School of Biological Sciences and Biotechnology
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.40 Forestry
- 3.40.55 Forest Dynamics
- Web Of Science research areas
- Forestry
- ESI research areas
- Plant & Animal Science