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Effect of Weeding on the Growth, Yield and Yield Contributing Characters of Mungbean (vigna Radiata L.)

Ms. Farhana Zaman
Lecturer
Department of Agronomy, Bangladesh Agricultural University Mymensingh-2202,Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at the Agronomy Field Laboratory of Bangladesh Agricultural University, Mymensingh to assess the effect of weeding on growth, yield and yield contributing characters of mungbean (Vigna radiata L.) cv. BINA mung- 4 during October 2011 to February 2012. The experiment was laid out in a randomized complete block design with four replications. The trial comprised seven treatments namely, T₁ = no weeding, T₂ = one-stage weeding (Emergence-Flowering), T₃ = one-stage weeding (Flowering-Pod setting), T₄ = one-stage weeding (Pod setting-Maturity), T₅ = two-stage weeding (Emergence-Flowering and Flowering-Pod setting), T₆ = two-stage weeding (Flowering-Pod setting and Pod setting-Maturity) and T₇ = three-stage weeding (Emergence-Flowering and Flowering-Pod setting and Pod setting-Maturity). The growth parameters such as relative growth rate (0.075 g g^-1day^-1) and net assimilation rate (0.075 g m^-2day^-1) showed the best performance with T₂ at one-stage weeding condition (Emergence-Flowering). Three-stage weeding ensured the highest plant height (58.62 cm) as well as the highest number of branches (4.45) and leaves (10.34) plant^-1. Dry weight plant^-1(12.38g) was highest from three stage weeding and the lowest from no weeding treatment. The highest number of pods (22.03) plant^-1, the longest pod (5.95 cm), the highest number of seeds (17.07) pod^-1 and the highest seed yield (1.38 t ha^-1) were obtained from three-stage weeding (Emergence-Flowering and Flowering-Pod setting and Pod setting-Maturity) in mungbean. On the other hand, the lowest seed yield was obtained under no weeding condition. The highest seed yield resulted in higher biological yield (4.70 t ha^-1) and the highest harvest index (37.15%) in three-stage weeding and the lowest from no weeding. Number of pods plant^-1, length of pod, number of seeds pod^-1 and 1000-seed weight showed highly significant positive correlations with seed yield. These parameters strongly influenced the growth, yield and yield contributing characters of mungbean (Vigna radiata L.).

Keywords: Weeding, Mungbean, Growth, Yield, Correlation

Location: BAU, Mymensingh

Start Date: 00-10-2011

End Date: 00-02-2012

Program Area: Pest Management

Commodity: Mungbean

Objectives:

To investigate the effects of weeding on growth, yield and yield components of mungbean.

Methodology:

The experiment was conducted at the Agronomy Field Laboratory of Bangladesh Agricultural University, Mymensingh during October 2011 to February 2012. The topography of the field was medium high, silt loam in texture and more or less neutral in reaction and moderate drained condition. The selected variety of mungbean in this experiment is BINA mung- 4. There were seven treatments in this experiment : T₁ = no weeding, T₂ = one-stage weeding (Emergence-Flowering), T₃ = one-stage weeding (Flowering-Pod setting), T₄ = one-stage weeding (Pod setting-Maturity), T₅ = two-stage weeding (Emergence-Flowering and Flowering-Pod setting), T₆ = two-stage weeding (Flowering-Pod setting and Pod setting-Maturity) and T₇ = three-stage weeding (Emergence-Flowering, Flowering-Pod setting and Pod setting-Maturity). The experiment was laid out in a randomized complete block design with four replications. The whole experimental area was divided into four blocks. Each block was divided into seven unit plots of 4.0 m × 2.5 m size each. Thus, the total number of unit plots was 28 (7×4). Seeds of mungbean variety viz. BINA mung-4 were collected from the Bangladesh Institute of Nuclear Agriculture (BINA), Bangladesh Agricultural University, Mymensingh. The experimental field was first opened with a power tiller on 15 October 2011. The experimental field was prepared by four times ploughing and cross ploughing followed by laddering. The weeds and stubble were removed from each plot and the field was leveled properly before sowing.

Source of Information: J. Bangladesh Agril. Univ. 11(1): 53–60, 2013, ISSN 1810-3030

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

From the above results, it may be concluded that BINAmung- 4 gave maximum yield at three-stage weeding in the three different growth stages like emergence to flowering (E-M), flowering to pod setting (F-P) and pod setting to maturity (P-M).

Knowledge Management: Journal