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Effect of Sowing Depth on Germination of Important Multipurpose Trees

M.T. Islam
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh-2202

M.A. Wadud
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh-2202

M.A. Mondol
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh-2202

G.M.M. Rahman
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh-2202

Abstract/ Executive Summary:

The experiment was conducted at the Agroforestry farm, Department of Agroforestry, Bangladesh Agricultural University, Mymensingh during the period from March 2010 to August 2010 to investigate the effect of sowing depth on germination of 15 multipurpose trees (MPTs) viz. Bakphul (Sesbania grandiflora), Sadakoroi (Albizia procera), Ipil-ipil (Leucaena leucocephala), Eucalyptus (Eucalyptus camaldulensis), Akasmoni (Acacia auriculiformis), Sonalu (Cassia fistula), Babla (Acacia nilotica), Kalokoroi (Albizia lebbeck), Raintree (Albizia saman), Jarul (Lagerstroemia speciosa), Mahogoni (Swietenia mahogani), Arjun (Terminalia arjuna), Polash (Butea monosperma), Minjiri (Cassia siamea) and Khoir (Acacia catechu). The seeds of these MPTs were sown at 10 different sowing depths which were 0.0cm, 0.5cm, 1.0cm, 1.5cm, 2.0cm, 2.5cm, 3.0cm, 3.5cm, 4.0cm and 4.5cm. Result revealed that germination was significantly influenced by sowing depth. Depending on the germination percent and germination period, optimum sowing depths of each MPTs were recorded. Optimum sowing depths were determined based on maximum germination percent and shortest germination period. Optimum sowing depths of 8 MPTs i.e. Bakphul, Sadakoroi, Ipil-ipil, Akashmoni, Sonalu, Babla, Kalokroi and Raintree are almost same (1.5-2.5cm). For other 7 MPTs i.e. Eucalyptus, Jarul, Mahogoni, Arjun, Polash, Minjiri and Khoir optimum sowing depths are 0.0, 0.0-0.5, 1.5-2.5, 1.0-3.0, 1.5-2.0, 0.5-1.0 and 0.5-1.0cm, respectively.

Keywords: Sowing depth, Multipurpose trees (MPTs), Germination percent.

Location: Agroforestry farm, Department of Agroforestry, Bangladesh Agricultural University, Mymensingh

Start Date: 00-03-2010

End Date: 00-08-2010

Program Area: Crop-Soil-Water Management

Commodity: Tree

Objectives:

1. To investigate the effect of sowing depth on germination of 15 multipurpose tree species (MPTs).

Methodology:

Effect of sowing depth on germination of 15 multipurpose trees was observed at the research field, Department of Agroforestry, Bangladesh Agricultural University, Mymensingh during March 2010 to August 2010. The experimental site is geographically located at about 24º75´ North latitude and 90º50´ East longitudes. Fifteen MPTs were Bakphul (Sesbania grandiflora), Sadakoroi (Albizia procera), Ipil-ipil (Leucaena leucocephala), Eucalyptus (Eucalyptus camaldulensis), Akasmoni (Acacia auriculiformis), Sonalu (Cassia fistula), Babla (Acacia nilotica), Kalokoroi (Albizia lebbeck), Raintree (Albizia saman), Jarul (Lagerstroemia speciosa), Mahogoni (Swietenia mahogani), Arjun (Terminalia arjuna), Polash (Butea monosperma), Minjiri (Cassia siamea) and Khoir (Acacia catechu). Seeds of these MPTs were used as planting materials for this study. The experiment was laid out in a Randomized Complete Block Design (RCBD) with 10 replications. Seeds were sown at 10 different soil depth these were 0.0cm, 0.5cm, 1.0cm, 1.5cm, 2.0 cm, 2.5cm, 3.0cm, 3.5cm, 4.0cm and 4.5cm. These different depths were the experimental treatments. Each MPTs was laid out in the same design side by side. Seeds were sown in the 21 cm x 15 cm size polybag. Total 1500 polybag (15 MPTs x 10 different depth x 10 replication) were used in this study. Each polybag was filled with well prepared soil. Pretreated seeds were sown in the polybag. Two seeds were sown in each polybag. Germination of each MPTs was observed everyday upto 45 days and information of germination were recorded. Total number of germinated seeds per replication was also recorded. Data of germinated seeds were collected from each treatment. The percentage of germination was calculated by using the formula: PG = (NGS ÷ NSS) ×100, Where, PG= Percentage of germination, NGS = Number of germinated seeds, NSS= Number of seeds sown. Recorded data were analyzed statistically to find out variation resulting from experimental treatments using MSTAT-C package program. The mean of all treatments were calculated and analysis of variances under study was performed by F-variance test at 5% and 1% levels of significance. The means of parameter were separated by Duncan’s Multiple Range Test (DMRT).

Source of Information: J. Agrofor. Environ. 4 (2): 1-5, 2010 ; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It is concluded that optimum sowing depth of studied 15 MPTs i.e., Bakphul, Sadakoroi, Ipil-ipil, Eucalyptus, Akashmoni, Sonalu, Babla, Kalokroi, Raintree, Jarul, Mahogoni, Arjun, Polash, Minjiri and Khoir are 1.5-2.0, 1.5-2.5, 2.5-3.5, 0.0, 1.0-2.0, 1.0-2.5, 1.5-2.0, 2.0-2.5, 1.0-1.5, 0.0-0.5, 1.5-2.5, 1.0-3.0, 1.5-2.0, 0.5-1.0 and 0.5-1.0cm respectively.

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