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Effect of Pruning and Pollarding on Shoot Development in Bakphul (sesbania Grandiflora L.)

M.S. Islam
Department of Agroforestry, Bangladesh Agricultural University, Mymensigh-2202, Bangladesh

M.A. Hossain
Department of Agroforestry, Bangladesh Agricultural University, Mymensigh-2202, Bangladesh

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

Abstract/ Executive Summary:

An experiment was carried out in a roadside agroforestry system established along farm roadsides of Bangladesh Agricultural University, Mymensingh, to investigate the effects of pruning and pollarding on shoot development in Sesbania grandiflora L. Six treatment combinations with the stock plants studied during the period from August to September, 2007. The results revealed that the different pruning and pollarding levels had significant variations on the parameters studied at different days after pruning (DAP). Among the treatments the pollarded shoot tip with lower and upper branch pruning produced the highest number of new branches (572) followed by the treatment of intact shoot tip with lower and upper branch pruning with 454 new branches at 60 DAP. The new branches produced from pruning and pollarding treatments attained its maximum length within a very short time. Maximum branch length (24.66 cm) was observed in the treatments of pollarded shoot tip with lower and upper branch pruned off condition followed by the treatment of intact shoot tip with lower and upper branch pruned off condition which attained 17.67 cm of length at 21 DAP. Again the pollarded shoot tip with lower and upper branch pruning produced 1127 number of leaves followed by the treatment of intact shoot tip with lower and upper branch pruning produced 999 leaves at 60 DAP. The results of this study suggest that the severely pruned plant (both lower and upper branch pruned along with pollarded shoot tip) not only produced huge amount of shoot biomasses but also enhance the development of new shoots within a very short period.

Keywords: Sesbania grandiflora L., Agroforestry, Pruning and Pollarding

Location: Farm roadsides of Bangladesh Agricultural University, Mymensingh

Start Date: 00-08-2007

End Date: 00-09-2007

Program Area: Resource Development and Management

Commodity: Bakphul

Objectives:

1. The present study was undertaken with a view to determine shoot development especially leaf forage in Sesbania grandiflora L.

Methodology:

The present experiment was carried out in the experimental plots under a Roadside Agroforestry Project established along farm road sides of Bangladesh Agricultural University, Mymensingh during the period from August to September, 2007. The experimental area is located (AEZ-9) at 24°75'N latitude and 90°50' E longitude at an 18 m above the sea level. The experiment was conducted in a Randomized Complete Block Design (RCBD) with three replications. There were six treatments and three blocks in the experiment. In this study one and half years old Sesbania grandiflora L. plants were used as a plant material. There were two factors of the experiment viz. A. Shoot tip conditions which include- a). shoot tip intact b). shoot tip pollarded and B. Branch pruning levels which include- c). no pruning d). only lower branches pruned off (up to 1.75m height) and e). Lower + upper branches pruned off at 50% length. Hence, the treatments were T₁ = control, T₂ = intact tip with lower branches pruned off up to 1.75m height, T₃ = intact tip with lower + upper branches pruned off at 50% length, T₄ = shoot tip pollarded with no branch pruning, T₅ = shoot tip pollarded with lower branches pruned off, T₆ = pollarded shoot tip with both lower + upper branches pruned off at 50% length. The parameters were the number of new branches, length of new branches and total numbers of leaves in new branches as an indicator of leaf forage production of the pruned plants at different DAP in Sesbania grandiflora. All the parameters were studied and data were recorded. The data for each of the parameters were analyzed to find out variations resulting from experimental treatments. The mean results were compared by Least Significant Difference (LSD) Test.

Source of Information: J. Bangladesh Agril. Univ. 6(2): 285–289, 2008; ISSN 1810-3030

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In this study it was observed that severe pruning/pollarding condition i.e. pollarded shoot tip with lower and upper branch pruning levels always produced higher number of buds, branches and leaves followed by the treatment of intact tip with lower and upper branch pruning level.

Knowledge Management: Journal