Influence of Spacing on Growth of Dhundul (Xylocarpus granatum) in the Sundarbans of Bangladesh

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Research areas:
Year:
2020
Type of Publication:
Article
Keywords:
Biodiversity, Dhundul Xylocarpus granatum, Mangrove, Spacing, Species, Threatened
Authors:
Dr. ASM Helal Siddiqui; Sk. Md. Mehedi Hasan; Dr. Md. Masudur Rahman
Journal:
IJRIES
Volume:
7
Number:
6
Pages:
76-85
Month:
November
ISSN:
2394-1375
BibTex:
Abstract:
Dhundul is one of the most important moderate-sized evergreen threatened mangrove species and play a pivotal role for the conservation of the ecosystem of Sundarbans. Between 2012 and 2017, an experimental plantation with randomize complete block design (RCBD) was conducted to enrich mangrove ecosystems by conserving dhundul at Moderate saline zone-comp nos. 31 of the Sundarbans. The objectives of this study are not only sustainable conservation of dhundul but also to create a better habitat as a source of the plus tree near future. Seedling survival percentage, mean height (h) and Mean Annual Increment (MAI) were observed each year to evaluate the effectiveness of dhundul plantation. The mean height (m), MAI (m) and survival percentage of dhundul differ significantly at different spacing. The highest mean height (m) and survival percentage have been found 2.46 ± 0.19, and 85%, respectively in the spacing 1m x 1m, as well as the highest Mean Annual Increment (MAI) for height 0.364m, were found in the same spacing. The result was highly significant (F = 1.57) at the 5% level for height. There are significant differences in the total mean height (m) among the spacing 2m x 2m, 1.5m x 1.5m and 1m x 1m. On the other hand (CV) at different spacing was 24.25, 20.09 and 21.98 for height. All these findings reflect that the growth performance of dhundul was better in 1m x 1m spacing. Artificial regeneration of dhundul was able to improve degraded residences and to ensure the sustainability of mangroves. So, it is highly recommended to establish long-term scientific research programs by setting up natural reserves of that threatened species and protect the existing mangrove mangrove ecosystem sustainably.