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Raising of Mahogany (swietenia Mahagoni L.) Seedlings to Combat Climate Change as Influenced by Organic Manures and Chemical Fertilizers

Mitu
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh

SK RI
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh

R Rifat
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh

I Jahanara
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh

HB Murshed
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh

MK Rahman
Department of Soil, Water and Environment, University of Dhaka, Dhaka-1000, Bangladesh

Abstract/ Executive Summary:

Effects of various organic manures on the growth, performance, and biomass production of Mahogany seedlings, an experiment was carried out in the net house of the Department of Soil, Water and Environment, University of Dhaka. Nine types of manures, viz. Kazi, ACI, Payel, BGF-1, Mazim, SK, Supermill, Sebok, Sufola organic manures were used separately at the rate of 12 ton/ha. Another dose of NPK inorganic fertilizer was used at the rate of 5kg/ha N, 3 kg/ha P, 3 kg/ha K respectively. Height, leaf area, and fresh and dry weights of leaf varied significantly (p≤ 0.5) and increased with time. Maximum leaf number (41.33 no./plant) and branch (6.33 no./plant) was found in Payel compost but maximum N concentration (2%) in leaf was obtained in Sebok treatment. Highest plant height (48.33 cm), leaf area (204.766 cm²/plant), girth (3.067 cm/plant), fresh weight (37.79g/plant), dry weight (9.16 g/plant), and length of the petiole (6.33 cm) were recorded in Supermill treatment at harvest. Results showed that the overall best growth performance of seedlings was achieved in Supermill compost.

Keywords: Biomass, Chemical fertilizer, Growth, Organic manure, Supermill, Mahagoni .

Location: Department of Soil, Water and Environment, University of Dhaka.

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Fertilizer and manures

Objectives:

To evaluate the effect of organic manure and NPK fertilizers on growth and yield performance of Mahogany (Swietenia mahagoni L.) grown in pot experiment at the premise of Department of Soil, Water and Environment, University of Dhaka.

Methodology:

Soil sample (0 to 15 cm depth) was collected from Dhaka. The sample was air-dried, ground, and sieved through a 2 mm sieve. The soil had a pH of 6.86 (1:2.5 w/v H₂O), organic carbon 0.26% (Wet oxidation method, Walkley and Black 1934), available nitrogen 24 mg/kg (Kjeldahl extraction, Marr and Cresser 1983), available phosphorus 6 mg/kg (Murphy and Riley 1962), and 3.77%, silt 68.23% and clay 28.00%, textural class- silt loam (Bouyoucos 1962), and water holding capacity was 32%. Leaf nitrogen is determined by (Cresser and Parson 1979) method. 0.1g dried and a ground sample was taken and 5 ml conc. H₂SO₄ and 2ml 4% (v/v) of HClO₄ (62%) were added with the sample. The digest was cooled and diluted to 100 ml with deionized water (Cresser and Parson 1979). 10 ml prepared sample was taken twice and after adding 10 ml 40% NaOH with 10 ml 2% Boric acid was titrated with 0.02M HCl. A pot experiment was carried out in the net house of the Department of Soil, Water and Environment, University of Dhaka. Seven kilograms of soil were taken per plastic pot (height 24cm and diameter 25cm). Nine types of organic manures manufactured by different companies were collected from the local market. The manures were Kazi and Kazi, ACI, Payel, BGF-1, Mazim, SK, Sufola, Sebok, and Supermill compost along with a separate dose of NPK at the rate of 5 kg/ha, 3 kg/ha, and 3 kg/ha respectively. The organic manures were properly mixed separately at the rate of 12 tons/ha with soil. Eleven treatments with three replications were used. Seeds of S. mahagoni were collected from Horticulture Centre, Asadgate, Dhaka. Three seeds were sowed per pot for germination and after two weeks seedlings were transported to compost mixed soils. The pots were watered thrice a week in the morning. The height of the plant, the number of leaves, and leaf area were measured at 15 days intervals up to 105 days. The plants were harvested as leaf, stem, root, washed with tap water and finally with distilled water, and wrapped with tissue paper. Immediately after the harvest, fresh weight of leaf, stem, and root was taken and then air-dried at room temperature and finally oven-dried at 65°C in the laboratory for 48 hours. The dry weight of the samples was recorded and the samples were ground with a mechanical grinder and stored in the polythene bags for further chemical analysis. Analysis of variance along with mean differences was performed using Minitab 2019.

Source of Information: J. biodivers. conserv. bioresour. manag. 6(2), 2020

Article Link (Online Journal): DOI: https://doi.org/10.3329/jbcbm.v6i2.55243

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It may be said that mahogany seedlings should be raised under the organic farming system and better growth of the seedlings was achieved in Supermill organic manure. The study indicates the application of organic manures in the field can significantly accelerate better growth in mahogany than chemical fertilizers.

Knowledge Management: Journal