Growth foliar and nutrient status of Terminalia amazonia planted in Southwestern Costa Rica

Nichols J.D., . and Gillespie A.R., . and Richter D.D., . Growth foliar and nutrient status of Terminalia amazonia planted in Southwestern Costa Rica. pp. 233-248. ISSN 0128-1283

Nichols J.D. Gillespie A. R. Richter D. D. 1997. Growth foliar and nutrient status of Terminalia amazonia planted in southwestern Costa Rica. A study was conducted to examine the growth of Terminalia amazonia a promising plantation species native to the humid neotropics in relation to soil and foliar nutrient levels its nutrient requirements and suitable management practices and to suggest further research. Plots of 49 trees were established in 25 three-year old plantations of Terminalia amazonia at sites ranging from sea-level to 1200 m above sea-level in tropical wet and premontane life zones in southwestern Costa Rica. Measurements of total tree height diameter at 10 cm above the ground surface and crown width at its widest point were taken for all trees in each of the 25 plots. Soil was collected at five points and included three depths: 0 to 5 cm for bulk density and physical and chemical property evaluation 15-30 cm and below 50 cm for chemical and physical property sampling. Sun leaves from seven healthy trees in each plot were also collected. Soil samples were analysed for pH exchangeable acidity total C total N extractable P K Ca Mg Na CEC base saturation and bulk density. Foliage samples were analysed for concentrations of total N P K C Ca Mg and Na. Using the formula d strength 2 h to calculate tree volume the greatest growth measured in each of three different life zones at three years was: tropical wet forest zone 29.5 cubic m per ha tropical moist forest zone 67.1 cubic m per ha and tropical premontane forest zone 49.6 cubic m per ha. Surface-soil phosphorous levels were generally below 4 ppm and foliar P levels were 0.16 percent or less in vigorously growing trees indicating that T. amazonia is quite efficient in its use of P. The species appeared to be growing better as N levels increased and at lower surface-soil bulk densities.

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Abstract

Nichols J.D. Gillespie A. R. Richter D. D. 1997. Growth foliar and nutrient status of Terminalia amazonia planted in southwestern Costa Rica. A study was conducted to examine the growth of Terminalia amazonia a promising plantation species native to the humid neotropics in relation to soil and foliar nutrient levels its nutrient requirements and suitable management practices and to suggest further research. Plots of 49 trees were established in 25 three-year old plantations of Terminalia amazonia at sites ranging from sea-level to 1200 m above sea-level in tropical wet and premontane life zones in southwestern Costa Rica. Measurements of total tree height diameter at 10 cm above the ground surface and crown width at its widest point were taken for all trees in each of the 25 plots. Soil was collected at five points and included three depths: 0 to 5 cm for bulk density and physical and chemical property evaluation 15-30 cm and below 50 cm for chemical and physical property sampling. Sun leaves from seven healthy trees in each plot were also collected. Soil samples were analysed for pH exchangeable acidity total C total N extractable P K Ca Mg Na CEC base saturation and bulk density. Foliage samples were analysed for concentrations of total N P K C Ca Mg and Na. Using the formula d strength 2 h to calculate tree volume the greatest growth measured in each of three different life zones at three years was: tropical wet forest zone 29.5 cubic m per ha tropical moist forest zone 67.1 cubic m per ha and tropical premontane forest zone 49.6 cubic m per ha. Surface-soil phosphorous levels were generally below 4 ppm and foliar P levels were 0.16 percent or less in vigorously growing trees indicating that T. amazonia is quite efficient in its use of P. The species appeared to be growing better as N levels increased and at lower surface-soil bulk densities.

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Item Type:	Article
Additional Information:	Summaries (En Ms)
AGROVOC Term:	TERMINALIA
AGROVOC Term:	INDIGENOUS ORGANISMS
AGROVOC Term:	GROWTH
AGROVOC Term:	FERTILIZERS
AGROVOC Term:	NUTRITIONAL STATUS
AGROVOC Term:	SOIL
AGROVOC Term:	CHEMICOPHYSICAL PROPERTIES
AGROVOC Term:	NUTRITIONAL REQUIREMENTS
AGROVOC Term:	MANAGEMENT TERMINALIA
AGROVOC Term:	ORGANISMOS INDIGENOS
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:52
URI:	http://webagris.upm.edu.my/id/eprint/17633

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