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Interaction Effects of Vegetables in Association with Two Years Old Hopea Odorata Sapling

M.K.I. Sayed
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh-2202

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

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

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

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

Abstract/ Executive Summary:

An experiment was carried out at the Agroforestry Farm, Department of Agroforestry, Bangladesh Agricultural University, Mymensingh, during November 2008 to March 2009 to evaluate the growing performance of five vegetables viz, stem amaranth (Amaranthus lividus), red amaranth (Amaranthus gangeticus), Palangshakh (Bengal spinach), Kalmishakh (Swamp cabbage) and Indian spinach (Basella aloha) grown under two years old Telsur (Hopea odorata) saplings at different distance. Influence of vegetables on the growth parameters of Telsur (Hopea odorata) also determined. The five vegetables were laid out using a Randomized Complete Block Design (RCBD) with three replications as separate experiment. In each experiment vegetables are grown at different distance from tree base which were treated as different treatment. Performance of vegetables in terms of morphological parameters as well as yield was influenced significantly by the distance from the tree. The result showed that production of all vegetables was gradually increased with increasing distance from tree base. Highest production was recorded in control condition (without tree) which was significantly similar with 3 and 4 feet distance from the tree base and the lowest was observed under 1 feet distance which was almost similar with 2 feet distance. The growth characteristics of Telsur (Hopea odorata) significantly influenced by the five vegetables. The highest growth was recorded in control condition which was statistically similar with sapling-red amaranth, Palangshakh , Kalmishakh and Indian spinach combination. The lowest tree growth was found under the combination of sapling- stem amaranth combination.

Keywords: Agroforestry practice, Vegetables, Interaction, Hopea odorata.

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

Start Date: 00-11-2008

End Date: 00-03-2009

Program Area: Farming System

Commodity: Tree, Vegetables

Objectives:

1. To evaluate the growing performance of five vegetables viz, stem amaranth (Amaranthus lividus), red amaranth (Amaranthus gangeticus), Palangshakh (Bengal spinach), Kalmishakh (Swamp cabbage) and Indian spinach (Basella aloha) grown under two years old Telsur (Hopea odorata) saplings at different distance.

Methodology:

The experiment was carried out at the experimental farm, Department of Agroforestry, Bangladesh Agricultural University, Mymensingh during the period from November, 2009 to March, 2010. The experimental site is geographically located at about 24⁰75? North latitude and 90?50? East longitudes. In this study five vegetables, such as stem amaranth (Amaranthus lividus), red amaranth (Amaranthus gangeticus), Palangshakh (Bengal spinach), Kalmishakh (Swamp cabbage) and Indian spinach (Basella alha) were grown in association with 2 years old Telsur (Hopea odorata) saplings. Each vegetable were laid using the Randomize Complete Block Design (RCBD) with three replications as separate experiment. Individual plot size was 9ft × 3ft. In each experiment vegetables are grown at different distance from tree base which were treated as treatment. For every experiments treatments were as; T₀= Open field (without trees)-control; T₁=1 feet distance from the tree; T₂= 2 feet distance from the tree; T₃= 3 feet distance from the tree and T₄= 4 feet distance from the tree; Hopea odorata sapling are also grown without vegetables association as control. After land preparation all vegetables seed were directly sown in the experimental plot on 20th November 2008. Necessary cultural operations were done for all vegetables. Plant samples of stem amaranth, red amaranth, Palangshakh, Kalmishakh and Indian spinach were collected randomly from the respective plots. Twenty plants of each vegetables were selected from each plot for data collection. Plant height (cm), stem girth (cm), no. of leaves per plant, leaf length (cm) and fresh weight plant^-1(g) were recorded from selected plants of respective vegetables. Yield of all vegetables calculated from the fresh weight per plant as t/ha. Height (cm), girth (cm), leaf size (cm²) and number of leaves per Hopea odorata sapling also measured during the harvesting period of vegetables. Data regarding various parameters under study from the experiment were statistically analyzed by the computer using statistical package program MSTAT-C. Mean comparisons were done by DMRT (Duncan’s Multiple Range Test) at 5% level of significance.

Source of Information: J. Agrofor. Environ. 3 (2): 103-106, 2010; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The growth characteristics such as plant height, stem girth, leaf numbers and leaf area of Hopea odorata significantly influenced by the interaction of stem amaranth. Height, stem girth, leaf numbers and leaf area of Hopea odorata were significantly lower when it was in association with stem amaranth. Among the five vegetables stem amaranth is the long time durable as well as large size vegetables and its root volume also large. For this reason competition may be dominant between Hopea odorata sapling and stem amaranth roots for growth resources especially for nutrient and moisture as a result Hopea odorata was suppressed. Medium growth pattern were observed in assiociation with Bengal spinach and Basella alha because these vegetables are medium durable. On the other hand, Amaranthus gangeticus and Swamp cabbage were short durable and small in size as a result in association in these vegetables Hopea odorata growth was almost similar with control condition upto 2 years period of Hopea odorata saplings. Hopea odorata growth was comparatively lower in association with stem amaranth, moderate in Swamp cabbage and Basella alha than others i. e., Amaranthus gangeticus and Bengal spinach. Yield of all vegetables were significantly lower with in the 1-3 feet distance from tree base i. e., 1.5 to 2 years of Hopea odorata plantation all five vegetables can be grown successfully more than 3 feet distance from tree base.

Knowledge Management: Journal