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Performance of Lettuce Under Six Years Old Lohakat Tree

M. S. Hossian
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh-2202

R. Pervin
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh-2202

J. Kundu
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh-2202

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

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

Abstract/ Executive Summary:

A field experiment was conducted at the field laboratory of the Department of Agroforestry at Bangladesh Agricultural University, Mymensingh during the period from October 2013 to March 2014 with the aim of evaluating the growth and yield performance of lettuce (Lactuca sativa) grown in combination with six years old Lohakat (Xylia dolabriformis) trees. The experimental design was followed by Randomized Complete Block Design (RCBD) with three replications in east and west direction. Different distances from tree base viz. 0-0.5m, 0.5-1.0m and 1.0-1.5m were treatments of this study in both east and west direction. There was a control treatment i.e. without tree condition or open field. The individual plot size was 6m x 2m and each plot contains two Lohakat trees maintaining 3m distance from one to another. Growth and yield of lettuce in association with Lohakat tree was remarkably increased with increasing distance from the tree base and the variation was very wide near the Lohakat tree base compared to open field condition. The highest plant height (29.10cm), number of leaves per plant (17.67), leaf size (16.50cm x 13.86cm), fresh weight (132.73g) and dry weight (11.43g) of lettuce were found in open field condition, while the lowest value regarding above parameters were recorded in 0-0.5m distance from tree base. As evident from results the highest fresh (26.5t/ha) and dry (2.3t/ha) yield of lettuce were observed in open field condition i.e. without Lohakat tree combination. The lowest value regarding fresh weight and dry weight were recorded 15.2t/ha and 1.4t/ha respectively in 0-0.5m distance from tree base. This fresh yield and dry yield were 42.64% and 39.13% lower respectively, in T₁ (0-0.5m from the tree base) compared to open field condition. So it was concluded that, the production of lettuce along with Lohakat tree can be profitable in more than 1m distance from the tree base and in case of fresh and dry yield it was comparatively 7.42% and 9.09% lower respectively in west direction rather than east direction.

Keywords: Lettuce, Lohakat tree, Agroforestry

Location: Department of Agroforestry at Bangladesh Agricultural University, Mymensingh

Start Date: 00-10-2013

End Date: 00-03-2014

Program Area: Farming System

Commodity: Lohakat, Lettuce

Objectives:

1. To investigate the effect of Lohakat tree on growth and yield performance of lettuce.

Methodology:

The experiment was carried out at the experimental farm, Department of Agroforestry, Bangladesh Agricultural University, Mymensingh, during the period from October 2013 to March 2014. The soil of the experimental area is a medium high land belonging to the Old Brahmaputra Floodplain Agro Ecological Zone-9. The texture of the soil was silty loam having pH 6.7. The topography of the field is medium high land above flood level. It appear cold but readily broken when pulverized. The climate of the location was characterized by relatively high temperature and heavy rainfall during Kharif or summer season (April to October) and low temperature and little rainfall during Rabi or winter season (November to March). In this study six years old tree of Lohakat (Xylia dolabriformis ) was used as tree component which was planted in the study plots six years ago i.e., in the year of 2008. The seeds of Lettuce were purchase from market. For the period of field experiment, Lohakat tree were well established and average height and girth of Lohakat trees were 7.59m and 0.40m, respectively. At first soils at the base of tree were loosening very well and make friable. Weeds were removed from the tree base; insect infested leaves were also removed. Irrigation was applied at the base of the tree. Irrigation was done two times in a day by the watering cane. The trees were pruned before final land preparation. So Lettuce plant gets the sunlight directly. It enhances the growth of Lettuce plants. The Experimental design was Randomized Complete Block Design with three replications. Three plots each of were laid around the tree three tree-crop distance treatments were used. These are: To = Open field referred to as control; T₁ = 0 - 0.5m distance from the tree base; T₂= 0.5 - 1.0m distance from the tree base; T₃= 1.0 – 1.5m distance from the tree base. Data regarding various parameters under study for the experiment were statistically analyzed by the computer using statistical package programmed WASP 2. Mean comparisons were done by DMRT (Duncan's Multiple Range Test) at 1% and 5% level of significance.

Source of Information: J. Agrofor. Environ. 8 (2): 7-10, 2014; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The production of lettuce along with Lohakat tree can be profitable in more than 1m distance from the tree base and in case of fresh and dry yield it was comparatively 7.42% and 9.09% lower respectively in west direction rather than east direction.

Knowledge Management: Journal