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Effect of Five Years Old Lohakat Tree (xylia Dolabriformis) on the Growth and Yield of Carrot

A. Akter
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

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

Abstract/ Executive Summary:

A field experiment was conducted at the Agroforestry Farm of Bangladesh Agricultural University, Mymensingh, during the period from September 2012 to March 2013 with the aim of evaluating effect of five years old Lohakat tree (Xylia dolabriformis ) on the growth and yield of Carrot (Daucus carota). The experiment was designed with a Randomized Complete Block Design (RCBD) with three replications. Different distances from tree base viz. 1.0-1.5m, 0.5-1.0m and 0-0.5m were treatments of this study. 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. In this study growth and yield of Carrot was observed as root production purpose. Growth and yield of Carrot in association with Lohakat tree was remarkably decreased with decreasing distance towards the tree base and the variation was very wide near the Lohakat tree base compare to open field condition. The result showed that plant characteristics viz. plant height (cm), no. of leaves plant^-1, leaf size (cm²), leaf weight plant^-1(g), root length (cm), root girth (cm), root weight plant^-1 (g) of Carrot was less vigorous near the Lohakat tree base. Individual root weight was highest (47.18 tha^-1) in open field condition which almost identical with the yield produced in the 1.0-1.5m distance area (46.65 tha^-1) from Lohakat tree base. It was found that yield of Carrot remarkably reduced with reducing distance from Lohakat tree base where 21.05 tha^-1 and 13.21 tha^-1 yield obtained from 0.5-1.0m and 0-0.5m distance area from Lohakat tree base respectively which were 55.38 and 72.00 % lower compare to open field condition. Thus it appears that yield performance of Carrot was better beyond 1m distance from Lohakat tree base without significant yield loss.

Keywords: Carrot, Lohakat, Xylia dolabriformis, Agroforestry

Location: Agroforestry Farm of Bangladesh Agricultural University, Mymensingh

Start Date: 00-09-2012

End Date: 00-03-2013

Program Area: Farming System

Commodity: Lohakat, Carrot

Objectives:

1. To study the effect of Lohakat tree on growth and yield performance of Carrot.

Methodology:

Study site: The experiment was carried out at the experimental field, Department of Agroforestry, Bangladesh Agricultural University, Mymensingh during the period from September 2012 to March 2013.The place is geographically located between 24⁰75´ North latitude and 90⁰50´ East Longitude. Plant materials: Lohakat (Xylia dolabriformis) tree and Carrot (Daucus carota) as crop were plant materials of this study. Lohakat trees were planted in the study plots in the year of 2008 i.e., five years ago. Carrot seeds were collected from BADC (Bangladesh Agricultural Development Corporation). Experimental design and treatment combination: The experiment was laid out following a Randomized Complete Block Design (RCBD) with three replications. In each replication two Lohakat trees were included in a 6m × 2m size plot. In this plot Carrots were planted in 17 rows surrounding the both Lohakat trees. Four tree crop distances were used as treatments of the study such as T0 (Open field referred to as control), T₁ (1.0 to 1.5 meter distance from the tree base), T₂ (0.5 to 1.0 meter distance from the tree base) and T3 (up to 0.5 meter distance from the tree base). Tree establishment and management: During the study period average height and girth of Lohakat trees were 6.59 m and 0.25 m, respectively. Lohakat trees were well established to compete significantly with Carrot for nutrient, moisture and other growth requirements. Before final land preparation the trees were pruned. Vegetable cultivation: Carrot seeds were directly sown in the experimental plots on November 2013. The seeds were sown maintaining 40 cm spacing from one line to another. After emergence, finally Carrot plants were thinned out maintaining 8 to 10 cm distance from plant to plant. All necessary management practices like fertilizer application, weeding, irrigation, pest and diseases control etc were done properly. Data collection: Data were collected randomly from all rows of respective plots at vegetative stage and when Carrot reached at proper harvesting stage. Eight representative sample plants were uprooted to collect data during vegetative stage .The parameters were studied such as plant height (cm), no. of leaves plant^-1, leaf size (length in cm and breadth in cm), leaf weight plant^-1(g), root length plant-1(cm), root girth plant^-1(cm), root weight plant^-1(g). At harvesting stage sample plants roots were weighted for fresh yield (expressed in gm) which were converted to tha^-1^. Statistical analysis: The recorded data were compiled and analyzed by RCBD design to find out the statistical significance of the experimental results. The means for all recorded data were calculated and the analyses of variance for all the characters were performed. The mean differences were evaluated by Duncan’s New Multiple Range Test (DMRT) .

Source of Information: J. Agrofor. Environ. 7 (2): 19-22, 2013; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Yield of Carrot was recorded as ton per hectare which was significantly influenced by Lohakat tree in different distance from tree base. Highest yield (47.18 tha^-1) was recorded under open condition which almost identical with the yield produced in the 1.0-1.5m distance area (46.65 tha^-1) from Lohakat tree base. It was found that yield of Carrot remarkably reduced with reducing distance from Lohakat tree base where 21.05 tha^-1 and 13.21 tha^-1 yield obtained from 0.5-1.0m and 0-0.5m distance area from Lohakat tree base, respectively which were 55.38 and 72.00 % lower compare to open field condition

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