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Nutrient Use Efficiency in Three Fast-Growing Tropical Trees

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Abstract:

We measured nutrient use efficiency (NPP/nutrient uptake) in three species of tropical trees, Hyeronima alchorneoides, Cedrela odorata, and Cordia alliodora. We tested the prediction that on fertile soils species with very different biomass and nutrient allocation and turnover would converge on a common value of nutrient use efficiency. Due to high soil fertility, nutrient use efficiencies of the species studied were low (95–150 and 433–962 for N and P use efficiency, respectively). Nutrient use efficiency was examined in terms of its components, nutrient productivity and the mean residence time of nutrients. Although the species converged on the same nitrogen (but not phosphorus) use efficiency, differences in nutrient productivity and nutrient residence time may confer varying abilities to deal with nitrogen limitation. A combination of high nutrient productivity and longer nutrient retention (e.g., Hyeronima) signals an ability to prosper on infertile sites, whereas high nutrient productivity in the absence of long nutrient retention (e.g., Cedrela) indicates a capacity for high productivity, but only on fertile soil. Nutrient use efficiency and its components help explain species' distributions in natural communities and can be important criteria in selecting perennial plants for human use. For. Sci. 48(4):662–672.

Keywords: Litterfall; environmental management; forest; forest management; forest resources; forestry; forestry research; forestry science; natural resource management; natural resources; nitrogen; nutrient uptake; phosphorus; productivity

Document Type: Miscellaneous

Affiliations: 1: The Ashoka Trust for Research in Ecology and the Environment, 659 5th A Main Road, Hebbal, Bangalore, 560024, India, Phone: (+80) 353 0069; Fax: (+80) 353 0070 hiremath@atree.org 2: Institute of Pacific Islands Forestry, The USDA Forest Service, 1151 Punchbowl Street Suite 323, Honolulu, HI, 96813,

Publication date: November 1, 2002

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