BANGLADESH JOURNAL OF FOREST SCIENCE
A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
A Half-yearly Peer Reviewed Journal of Bangladesh Forest Research Institute
This paper deals with the effects of soil physical properties on sissoo (Dalbergia sissoo Roxb.)
mortality. A research was conducted at different severely affected sissoo mortality sites of Chittagong,
Chuadanga, Comilla, Kushtia, Meherpur and Tangail districts of Bangladesh during 2008-2010. During
pre-and post monsoon and drought period soil and root samples were collected from the different sites. Soil
properties (soil texture, pH, organic matter, moisture content and bulk density) were analyzed and fungal
strains, mites and bacteria were isolated. From the analyses of data, average moisture content at the 0-30 cm
soil depth was found higher in Daulotpur (18.58%) followed by Jibonnagar (18.11%), Potia (15.92%) and
Mehepur Sadar (15.02%) respectively and lower in all sites of Tangail district (5.52-1.76%). It is observed
that fine textured soil and root interference enhances pathogenic attack. Findings reveal to conclude that
moisture stress period as well as temperature supports activities of Fusarium solani and mortality symptoms expressed prominently.
This study was conducted to examine the effects of post-severance treatments
like leaf area of cuttings and auxin treatment on rooting of cuttings and growth of
rooted cuttings. One or two-node cuttings of sissoo, Dalbergia sissoo Roxb. with 20 or
50% leaf area were collected from managed stock plants and rooted in a non-mist
propagator following treatment with 0 or 0.2% indole-3 – butyric acid (IBA) solution.
The rooted cuttings were transferred to polythene pots and grown in a nursery for 10
weeks. Rooting percentages of cuttings were not significantly influenced by IBA
treatment or cutting size, but were significantly enhanced with the increased leaf area.
Effects of leaf area and IBA on root development of cuttings in the propagator were
manifested on the grow th of stecklings in the nursery. The increased leaf area and IBA
treatment significantly enhanced the growth of stecklings. Cuttings with 50% leaf
area plus 0.2% IBA was the best treatment to produce the best performing stecklings
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