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Performance of Mixed Cropping of Lentil with Cowpea Under Variable Seeding Ratios

I. S. M. Farhad*
Soil Science Division, BARI, Gazipur, Bangladesh

E. Jahan
Department of Agricultural Chemistry, SAU, Dhaka, Bangladesh

M. A. Rahman
Department of Agronomy, SAU, Dhaka Bangladesh

M.G.Azam
RARS, BARI, Hathazari, Chittagong, Bangladesh

T. A. Mujahidi
Plant Breeding Division, BARI, Gazipur, Bangladesh

Abstract/ Executive Summary:

The field experiment was carried out at South Lemua, MLT site, Feni (AEZ 19) during Rabi season of 2015-16 to evaluate the performance of lentil as mixed crop with cowpea under variable seeding ratio. The treatment combinations used for the experiment were T1= Sole Lentil (100 %) @ 40 kg seed ha^-1, T2 =Sole Cowpea (100%) @ 45 kg seed ha^-1, T3 = Lentil (100%) + Cowpea (10 %), T4 = Lentil (100 %) + Cowpea (20 %) and T5 = Lentil (100 %) + Cowpea (30 %). Lentil var. BARIMashur-6 and cowpea variety BARI Felon-1 were used in this study. The yield of lentil decreased with the increase of cowpea population in the mixed cropping situation. All the mixed cropping combinations showed higher lentil equivalent yield (LEY), land equivalent ratio (LER), net return and benefit cost ratio (BCR) than sole cropping. The highest lentil equivalent yield (1438 kg ha^-1) and maximum land equivalent ratio (1.24) were observed in T4 treatment. Cost and return analysis showed that the highest net return (Tk. 77,890 ha^-1) was found in T4 treatment while sole cowpea gave the lowest net return (Tk. 7530 ha^-1). The highest benefit cost ratio (3.09) was recorded from lentil (100 %) + cowpea (20 %) whereas the minimum (1.21) from sole cowpea.

Keywords: Mixed cropping, Lentil, Cowpea, Equivalent yield

Location: At South Lemua, MLT site, Feni (AEZ 19)

Start Date: 00-00-2015

End Date: 00-05-2016

Program Area: Crop-Soil-Water Management

Commodity: Lentil, Cowpea

Objectives:

The present study was, therefore, undertaken to determine the most profitable mixed crop combination of lentil and cowpea.

Methodology:

The experiment was carried out at South Lemua, MLT site, Feni during Rabi season of 2015-16. The soils of the experimental areas belong to the Young Meghna River Estuarine Flood Plain (AEZ 19). The soils of the experimental plots were clay loam in texture. The experiment was laid out in Randomized Complete Block design with six dispersed replications. It was consisted with five treatments as follows: T1 = Sole Lentil1 (100 %) @ seed rate 40 kg ha^-1, T2 = Sole Cowpea (100 %) @ seed rate 45 kg ha^-1, T3= Lentil (100 %) + Cowpea (10 %), T4 = Lentil (100%) + Cowpea (20 %) and T5 = Lentil (100 %) + Cowpea (30%). According to the treatments, seeds of Lentil (BARI Mashur-6) and Cowpea (BARI Felon-1) were broadcasted on 7-11 December, 2015. The unit plot size was 40 m² (10m x 4m). The lands were fertilized with 21, 18, 20, 7, 1.5 and 1.5 kg N-P-K-S-Zn-B ha^-1, respectively. Two-third urea and entire amount of all fertilizers were applied during final land preparation as basal in all the treatment combination and rest 1/3rd urea was applied as top dress at about 30 days after broadcasting. One weeding was done at 30 days of sowing. A systemic insecticide (cypermethrene) was sprayed at seedling stage to control aphids and thrips. Lentil was harvested on 10-12 March, 2016 whereas, cowpea harvesting started on 8 March and continued up to 13 April, 2016. Data on the different crop parameters were collected from the 10 sample plants and then average was taken which was further analyzed by computer program Crop Stat. Lentil equivalent yield (LEY), land equivalent ratio (LER) and economic analysis were calculated to ascertain the efficiency of mixed cropping. Lentil equivalent yield was calculated by converting yield of mixed crops to the yield of lentil on the basis of prevailing market prices of individual crops. Lentil equivalent yield (LEY) was calculated after Bandyopadhyay, 1984.

Source of Information: Bangladesh Agron. J. 2017, 21(1): 125-129

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Considering the yield and return it can be concluded that 100% lentil with 20% cowpea is the most profitable one as compared to other treatment combination when grown as mixed crop. From the results, it is evident that mixed cropping of lentil with cowpea is more profitable than the sole cropping and the risk of cultivation of one crop can be reduced by adopting the mixed cropping system. Nonetheless, 100% lentil with 20% cowpea is the most profitable mixed crop compared to other treatment.

Knowledge Management: Journal