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Growth Response of Eucalyptus Camaldulensis to Different Fertilizers in One Year Old Plantation

S. P. Paul
Divisional Officer (Rted.)
Soil Science Division, Bangladesh Forest Research Institute, Chittagong.

A. T. M. Emdad Hossain
Divisional Officer (Retd.)
Soil Science Division, Bangladesh Forest Research Institute, Chittagong.

H. B. De
Research Officer (Late)
Soil Science Division, Bangladesh Forest Research Institute, Chittagong.

Abstract/ Executive Summary:

Evaluation was made on growth response of one year old Eucalyptus camaldulensis seedlings to various dose-combinations of NP fertilizers under a comparatively poor site condition of Silvicultural Research Station at Keochia. Results indicate that the maximum average height (262.17 cm) and diameter (2.08 cm) of the seedlings in one year were attained through application of urea and triple super phosphate (TSP) combined at the rate of 30 and 20 g/pit respectively with a basal dose of muriate of potash (MP) at 20 kg/ha. Application of the above mentioned fertilizer dose promoted above-ground green biomass production almost 8 times higher than the control. Subsequently, the biomass distribution to shoot, leaf and twig was modified. The intake of nutritional elements by the seedlings was found to increase due to application of fertilizer.

Keywords: Biomass, Eucalyptus camaldulensis, Fertilizers, Nutritional intake, Seedling growth

Location: Silvicultural Research Station at Keochia, Sitakunda under Bangladesh Forest Research Institute, Chittagong

Start Date: 01-07-1994

End Date: 30-06-1996

Program Area: Crop-Soil-Water Management

Commodity: Eucalyptas

Objectives:

To investigate the effect of fertilizers on the growth of Eucalyptus camaldulensis seedlings in the early plantation stage

Methodology:

The study was conducted at the Silvicultural Research Station at Keochia, Sitakunda under Bangladesh Forest Research Institute, Chitagong. The experimental site is represented by the undulating terrains of closely dissected low hills with shallow to moderate soil depth. Some soil properties of the experimental site are analyzed. The experiment was laid out in Randomized Complete Block Design (RCBD) and replicated three times. The nitrogenous and phosphatic fertilizers were combined to form 16 treatment combinations including no-fertilizer control. A common dose of muriate of potash (MP) was applied as basal fertilizer at the rate of 20 kg/ha. The variable doses of nitrogen as urea and phosphorus as triple super phosphate (TSP) in g/pit were as follows:

T₁ = N₀P₀T₂ = N₁₅P₀T₃ = N₃₀P₀ T₄ = N₆₀P₀

T₅ = N₀P₁₀T₆ = N₁₅P₁₀T₇ = N₃₀P₁₀ T₈ = N₆₀P₁₀

T₉ = N₀P₂₀T₁₀ = N₁₅P₂₀T₁₁ = N₃₀P₂₀ T₁₂ = N₆₀P₂₀

T₁₃ = N₀P₄₀T₁₄ = N₁₅P₄₀T₁₅ = N₃₀P₄₀ T₁₆ = N₆₀P₄₀

Half of the urea and the full dose of TSP were applied in the pit of 30 cm x 30 cm x 30 cm size. The fertilizers in the pit were mixed with soil dug out and left for two weeks. Broadcasting of MP was made just before application of urea and TSP. At the 16^th day after fertilizer application, the planting activities of the seedlings were carried out. The rest of the urea was applied at 5-8 cm depth by drilling around the base of the seedlings at 1.5 month after planting.

Source of Information: Bangladesh Journal of Forest Science, Vol. 27, No. 2, July-December, 1998

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 1,00,000.00

Total Budget (Tk.) : 1,00,000.00

Achievement/Findings:

Application of NPK is essential for incremental growth of Eucalyptus camaldulensis seedlings especially in the planting time under poor site condition. Fertilizing eucalyptus seedlings with urea and TSP at the rate of N₃₀P₂₀ g/pit and a basal dose of 20 kg MP/ha enhances height and diameter increment by about two times and above-ground green biomass by eight times in the one year old plantation. Use of increased level of NPK particularly N₃₀P₂₀ g/pit with a basal dose of 20 kg MP/ha makes the biomass distribution pattern to shoots, leaves and twigs more uniform. Application of mineral fertilizers (NPK) stimulates removal of nutrients by Eucalyptus camaldulensis seedlings in one year old plantation.

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