Growth and yield response of different cowpea (Vigna unguiculata (L.) Walp.) varieties under varying phosphorus management

Growth and yield response of different cowpea (Vigna unguiculata (L.) Walp.) varieties under varying phosphorus management

Authors

  • Elizabeth Mathew M.Sc Student College of Agriculture, Vellayani Thiruvananthapuram Kerala Agricultural university
  • SUDHA B Assistant Professor (Agronomy) PRS, Panniyur Kannur Kerala Agricultural University
  • Shalini Pillai P Professor and Head Department of Agronomy College of Agriculture, Vellayani Kerala Agricultural University
  • Jacob John Professor and Head IFSRS, Karamana Kerala Agricultural University
  • Chitra N Assistant Professor Kerala Agricultural University

Keywords:

Crop nutrition, Soil fertility management

Abstract

A field experiment was conducted at the Integrated Farming System Research Station (IFSRS) under KeralaAgricultural University (KAU), located at Karamana in Thiruvananthapuram, Kerala, during summer 2021for studying the performance of grain cowpea varieties in summer rice fallows and to assess the influence ofbeneficial phosphorus inoculants in enhancing phosphorus availability for the crop. The treatments includedthree varieties of grain cowpea and five different strategies for phosphorus nutrition. The test crop varietieswere Kanakamony, PGCP-6 and DC-15. Phosphorus levels comprised the KAU recommended dose ofP(RDP) i.e. @30 kg P2O5 ha-1and lower doses of RDP (75 and 50 %) along with either AMF, PSB or both.Factorial RBD was the experimental design followed, with the treatment combinations laid out in threereplications. Growth parameters of the crop including count of branches per plant, root mass and rootvolume; parameters contributing to yield including pod count per plant and average weight of pods weresignificantly higher for the variety PGCP-6 which also recorded higher grain yield and nutrient uptake.Application of AMF and PSB, along with 75 per cent of RDP and with 50 per cent of RDP recorded higherand comparable growth attributes (plant height, count of branches, effective nodulation, AMF rootcolonization, root mass and volume), yield and yield contributing attributes (harvest index, number of podsand grain yield per plant) and uptake of major plant nutrients.

Author Biographies

Elizabeth Mathew, M.Sc Student College of Agriculture, Vellayani Thiruvananthapuram Kerala Agricultural university

Post graduate studentDepartment of AgronomyCollege of Agriculture, VellayaniKerala Agricultural university

SUDHA B, Assistant Professor (Agronomy) PRS, Panniyur Kannur Kerala Agricultural University

Pepper Research Station, PanniyurKannur Kerala Agricultural University 

Shalini Pillai P, Professor and Head Department of Agronomy College of Agriculture, Vellayani Kerala Agricultural University

Professor and HeadDepartment of AgronomyCollege of Agriculture, VellayaniKerala Agricultural university

Jacob John, Professor and Head IFSRS, Karamana Kerala Agricultural University

Professor and HeadIFSRS, KaramanaKerala Agricultural University

Chitra N, Assistant Professor Kerala Agricultural University

Department of microbiologyCollege of Agriculture, VellayaniThiruvananthapuram, Kerala Agricultural University 

References

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Published

27-07-2024

How to Cite

Mathew, E., B, S., P, S. P., John, J., & N, C. (2024). Growth and yield response of different cowpea (Vigna unguiculata (L.) Walp.) varieties under varying phosphorus management. Journal of Tropical Agriculture, 62(1), 136–144. Retrieved from https://jtropag.kau.in/index.php/ojs2/article/view/1355

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