Accumulation in above-ground biomass and soil storage of mineral nutrients in pure and mixed plantations in a humid tropical lowland
The goal was to assess the role of nutrient accumulation in above-ground biomass on potential site nutrient decline, and to draw recommendations to conserve site nutrients in the long term. In Plantation 1, Jacaranda copaia pure stands had higher above-ground tree N, P, and Mg than the other treatments, while Vochysia guatemalensis had the greatest accumulation of K and Ca. For J. copaia, stem harvest would remove about 54% of total above-ground tree N, but about 80% of P, K, Ca and Mg. For V. guatemalensis, stem harvest would remove less than 30% of N but from 50 to 60% of total above-ground tree Ca, K, Mg and P. Five years after planting, decreases in soil P, K and Ca were apparent in pure plots of the fastest growing species with the largest accumulation of nutrients in above-ground biomass, such as J. copaia and V. guatemalensis. The mixed plots showed intermediate values for the nutrients examined, and even improved soil conditions, as for P in Plantation 1. This suggests that in mixed conditions it may take longer to deplete soil nutrients than in monospecific stands of fast-growing species. Results of continued sampling will be needed to assess the long term effects of plantation treatments on soil chemistry, especially near the end of the rotation (estimated at 12–15 years, depending on the species). The calculation of whole-stand nutrient budgets can help in the selection of tree species and plantation management strategies to favor nutrient recycling mechanisms and site nutrient conservation.
| Main Author: | |
|---|---|
| Format: | Texto biblioteca |
| Language: | eng |
| Published: |
Países Bajos Elsevier
2000
|
| Subjects: | PLANTACION FORESTAL, ARBOLES, SUELO, NUTRIENTES MINERALES, FERTILIDAD DEL SUELO, BIOMASA, ORGANISMOS INDIGENAS, BIOMASA AEREA, ECUACIONES ALOMETRICAS, TIERRAS BAJAS, AGRICULTURA, ZONA TROPICAL, NUTRIENTES, |
| Online Access: | http://orton.catie.ac.cr/repdoc/A11117i/A11117i.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|