Effect of different levels of nitrogen and phosphorus on cowpea [Vigna unguiculata (L.) Walp] under rainfed conditions of Rajasthan


  • Roop Chand Balai
  • L R Meena
  • S C Sharma


Cowpea, Yields, Nitrogen, Phosphorus, Protein, Economics


An field experiment was conducted during kharif 2014 and 2015, at Central Sheep and Wool Research Institute, Avikanagar (Rajasthan) to study the effect of nitrogen and phosphorus levels on growth attributes, herbage yield and quality of fodder cowpea [Vigna unguiculata (L.) Walp.]. All growth attributes were significantly (plant height, branches/plant) higher with 30 kg N/ha applied to cowpea. Maximum green fodder, dry matter yield and crude protein content were recorded (178.11 and 36.12 q/ha and 18.07%) with the use of 30 kg N/ha. Besides, Crude protein content was increased greater extent upto 30 kg N/ ha, but the differences between 20 and 30 kg N levelswas found remained at par with each other for protein content in haulm of cowpea. The application of phosphorus upto 60 kg P2O5/ha resulted maximum raised in green fodder and dry matter yield (179.06 and 35.83 q/ha) as compared to other levels. Crude protein content in dry matter was responded well upto 60 kg P2O5 /ha and it was increased by (12.50%) higher over control. The higher net return in terms of gross income (Rs. 28896/ha), net return (Rs. 17044/ha) and benefit: cost ratios (1.69) were realized under 30 kgN/ha. Similarly, 60 kg P2O5 /ha in cowpea gave the additional gross return (Rs. 8100/ha) and net return (Rs. 1769/ha) as compare to without use of phosphorus. Significant interaction of nitrogen and phosphorus levels was noted on green fodder yield.


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Author Biographies

Roop Chand Balai

Scientist (Soil Science), HRD & TOT Section, ICAR-CIAH, Bikaner-334006

L R Meena

Central Sheep and Wool Research Institute, Avikanagar- 304501, Rajasthan

S C Sharma

Central Sheep and Wool Research Institute, Avikanagar- 304501, Rajasthan


AOAC. 1960. Official methods of analysis 8th and Association of Official Agricultural Chemist. P.O.Box 540. Benjamin frankin station, Washington.
Ahmed M. El Naim, Amgad M. Hagelsheep, Muatasim S. Abdelmuhsin and Abdu E. Abdalla.2010.Effect of intra-row spacing on growth and yield of three cowpea (Vigna unguiculata L. Walp) varieties under Rainfed. Research Journal of Agriculture and Biological Sciences 6 (5):623-629.
Hazra, C.R. and Sinha, N.C. 1996. South Asian publishers Pvt. Ltd. 50 Sidharth Enclave, P.O.Jagatpuri, New Delhi.
Meena, L.R. and Mann, J.S.2011. Effect of row ratios and integrated nitrogen management on the peoductivity and economics of Cenchrus ciliaris and moth bean (Phaseolus aconitifolius) intercropping system in semi-arid condition of Rajasthan. Indian Journal of Small ruminants17(2):210214.
Indoria, A.K., Majumdar, S.P. and Majumdar, V.L. 2005. Effect of compaction, nitrogen and phosphorus on the performance of cowpea (Vigna unguiculataL.). Forage Research 31(2):112-114.
Singh, B.B., Ajeigbe, H.A., Tarawali, Rivera, S Fernandez and Abubakar, Musa.2003. Improving the production and utilization of cowpea as food and fodder. Field Crop Research 84(1-2:169-177




How to Cite

Balai, R. C., Meena, L. R., & Sharma, S. C. (2017). Effect of different levels of nitrogen and phosphorus on cowpea [Vigna unguiculata (L.) Walp] under rainfed conditions of Rajasthan. Journal of Agriculture and Ecology, 3(3), 19–24. Retrieved from https://journals.saaer.org.in/index.php/jae/article/view/27