Effect of potassic fertilization on yield of fodder sorghum-sudan grass hybrid and selection of extractants for determination of plant potassium availability

Authors

  • Subhadip Paul ICAR-Indian Agricultural Research Institute, New Delhi-110012, India Author
  • Mandira Barman ICAR-Indian Agricultural Research Institute, New Delhi-110012, India Author
  • Debarup Das ICAR-Indian Agricultural Research Institute, New Delhi-110012, India Author

Keywords:

Ammonium acetate, Sodium tetraphenylborate, Sorghum-Sudan grass hybrid

Abstract

The current study was carried out to assess the effect of potassium (K) fertilization on K-uptake and yield of fodder sorghum-sudan grass hybrid and to choose extractant(s), delineating the K-availability for routine soil testing method. Hybrid sorghum-Sudan grasses were grown in three different soils (red, alluvial, and black) with 100, 50, and 0% recommended K-doses for five seasons. Seven extractants, namely, cold H2SO4, Mehlich-1, 0.1 N CH3COONa, 1 N CH3COONH4 (pH 7), 0.1 N BaCl2, and sodium tetraphenylborate (NaTPB) with 5 and 15 minutes of contact times, were evaluated for elucidating forage K-availability. Results have revealed that biomass yields from all soils were higher (p < 0.05) in K-100% than in K-0%; whereas NaTPB (5 minutes) and ammonium acetate were found as better extractants for the determination of forage K-availability.

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Published

2024-03-21

Issue

Vol. 45 No. 01 (2024): Range Management and Agroforestry

Section

Research article

How to Cite

Effect of potassic fertilization on yield of fodder sorghum-sudan grass hybrid and selection of extractants for determination of plant potassium availability. (2024). Range Management and Agroforestry, 45(01), 82-89. https://myresearchjournals.com/rma/article/view/24