Journal of Environmental Biology

Phosphorus uptake of groundnut under high density plantations with graded levels of phosphorus

T.S. Kumar¹, V. Sumathi², Y. Reddiramu³, M.S.S.C. Satya⁴ and Sanjay-Swami⁴*     

¹Department of Agronomy, NMCA, Navsari Agricultural University, Navsari-396 450, India

²Department of Crop Production, Perumallapalli Research Station, Tirupati-517 502, India

³Department of Crop Production, DAATTC Centre, Kalikiri, Chittoor-517 243, India

⁴School of Natural Resource Management, College of Post Graduate Studies in Agricultural Sciences, Central Agricultural University, Umiam - 793 103, India

Received: 28 December 2023                   Revised: 14 February 2024                   Accepted: 21 March 2024

*Corresponding Author Email : sanjayswamionline@gmail.com                  *ORCiD: https://orcid.org/0000-0001-8961-4671

Abstract

Aim: To determine the optimum level of phosphorus for higher yield and phosphorus uptake by groundnut at different planting densities.

Methodology: A field experiment was laid out in randomized block design with factorial concept during Rabi seaon 2019-20 to study the phosphorus uptake by groundnut under high density plantation (22.5 x 10 cm - 4.44 lakh ha^-1; 20 x 7.5 cm - 6.66 lakh ha^-1; 22.5 x 5 cm - 8.88 lakh ha^-1 with graded levels of phosphorus (25, 37.5, 50 and 62.5 kg P₂O₅ ha^-1).

Results: The present study revealed that 4.44 lakh ha^-1 registered lower phosphorus uptake and application of 62.5 kg P₂O₅ ha^-1 recorded a higher uptake of phosphorus and soil available nitrogen, phosphorus, and potassium. Interaction was significant only in influencing pod yield. Higher pod yield was recorded in the population density of 4.44 lakh ha^-1 applied along with 50 kg P₂O₅ ha^-1, followed by 6.66 lakh ha^-1 applied with 62.5 kg P₂O₅ ha^-1.

Interpretation: The results indicate that for better nutrient uptake and higher pod yield of groundnut, farmers should prefer a planting density of 6.66 lakh ha^-1 with an application of 62.5 kg P₂O₅ ha^-1.

Key words: Groundnut, Nutrient uptake, Plant density, Phosphorus, Pod yield

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