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Effects of Different Management Practices on Yield and Yield Attributes of Cowpea (2018--2019)

M. O. ALI
Pulses Research Centre, Ishurdi, Pabna

M. A. ISLAM
Pulses Research Centre, Ishurdi, Pabna

J. HOSSAIN
Pulses Research Centre, Ishurdi, Pabna

R. UDDIN
Pulses Research Centre, Ishurdi, Pabna

M. R. ISLAM
Pulses Research Centre, Ishurdi, Pabna

M. S. ALOM
Pulses Research Centre, Ishurdi, Pabna

Abstract/ Executive Summary:

A field study was carried out at Regional Agricultural Research Station, Rahmatpur, Barishal to study the effect of different management practices on yield and yield attributes of cowpea. The experiment was carried out with seven different management options e.g. i) Two-time spray of insecticide ii) Chemical fertilizer + two-time spray iii) Weeding + Chemical fertilizer iv) Chemical fertilizer + weeding + two time spray v) Weeding vi) Weeding +two time spray vii) Chemical fertilizer viii) control under randomized complete block design with three replications. BARI Felon 1 was used as the variety. The results revealed that the combination of chemical fertilizer, weeding and spraying management options had produced the highest seed yield (1213.1 kg/ha) and yield contributing characters. The use of chemical fertilizers along with weeding practices had also demonstrated statistically identical seed yield (1102.2 kg/ha). Two times spray of insecticides rendered the highest benefit-cost ratio (2.19) than other management practices.

Keywords: Coastal region, Cowpea, Management practice

Location:

Start Date: 00-00-2018

End Date: 00-00-2019

Program Area: Crop-Soil-Water Management

Commodity: Cowpea

Objectives:

To optimize yield and maximizing cowpea production in the coastal southern region of Bangladesh there is no alternative to invent suitable cost-effective management options. Therefore, the experiment was undertaken to find the best management option/s to suggest to the farmers.

Methodology:

The experiment was implemented at Regional Agricultural Research Station, Rahmatpur, Barishal in a single factor randomized complete block design with three replications. The unit plot size was 4m x 3m. Initially, the experimental area was divided into three blocks to represent three replications. Each replication contained seven plots. Block to block and plot to plot distance was 1m and 0.5m respectively. BARI Felon 1 was selected as the variety and the sowing date was December 20. The experimental field was fertilized with @20-40-20-10 kg/ha of NPKS as basal dose where chemical fertilizers are management options. No supplemental fertilizers were applied during crop growth stages. As chemical insecticides, Imitaf @0.5 ml/L was used against leaf sucking insects, first spray at 60 DAE and second spray at 100 DAE. Weed control measures were taken considering the rainfall conditions where a maximum of three weed control measures was taken after 45 DAE. For collecting yield contributing characters, plants from 50 cm x 30 cm area were sampled from each plot of each replication. For yield data, the whole plot sample was counted. The treatments were as follows: different sowing methods e.g. ( i) Two time spray of insecticide (T₁) (ii) Chemical fertilizer + two time spray (T₂) (iii) Weeding + Chemical fertilizer (T₃) (iv) Chemical fertilizer + weeding + two time spray (T₄) (v) Weeding (T₅) vi) Weeding +two time spray (T₆) vii) Chemical fertilizer (T₇) and viii) control (T₈) . Different phenological data e.g. days required for different developmental stages were counted for different management practices. The collected data were analyzed by the statistical software R and the least significant differences were calculated at a 5% level of significance (Gomez and Gomez, 1984).

Source of Information: Annual Research Report 2018-2019, Pulses Research Centre, RARS, Ishurdi, Pabna

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It can be observed that a number of plant population/plot did not differ significantly among different management options. Days to flowering differ significantly among the treatments and management practice of only two times spray requires the minimum days to reach flowering stage. Management option T₅ e.g. only weeding requires minimum days to reach maturity whereas T₈ requires the maximum. Management option T₄ e.g. combination of weeding, spraying and chemical fertilizers produced the highest number of pod/plant (25), seed/pod (16.96), hundred seed weight (10.67) and hence the highest yield (1213.1 kg/ha) also. The lowest yield (278.9 kg/ha) can be observed from control due to less population density and lack of management practices. Profitability analysis of different management practices indicating that T₁ e.g. two-time spray of cowpea is more profitable than other management practices (BCR 2.19). T₅ e.g. only weeding management practice also gave satisfactory BCR (2.02). High management practices required high cultivation costs and therefore demonstrated low BCR. T₄high management treatment exhibited the lowest BCR (0.5) compared to other management practices. From the above discussion, it can be concluded that T₄ treatment combination e.g. one-time spraying + weeding + chemical fertilizers gave satisfactory yield compared to other management options. Furthermore, T₃treatment e.g. combination of weeding + chemical fertilizers also produced statistically identical yield and yield contributing characters. But from a profitability point of view, T₁ e.g. two times spray of insecticides is more profitable than other management practices.

Knowledge Management: Report/Proceedings