Effect of different ratios and levels of nitrogen and phosphorus fertilizers, and top dressing of nitrogen fertilizers on growth and yield of groundnut

Kumar, B.T.N. and Malligawad, M.H. and Halikatti, S.I. and Hiremath, S.M. and Srineevasa, M.N. and Bidari, B.I. (2015) Effect of different ratios and levels of nitrogen and phosphorus fertilizers, and top dressing of nitrogen fertilizers on growth and yield of groundnut. Karnataka Journal of Agricultural Sciences, 28 (1). pp. 8-11.

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Abstract

A field experiment was carried out during 2011 with fourteen ratios of nitrogen (N) and phosphorus (P2O5) fertilizers with constant potassium level (25 kg K2O ha-1) on groundnut cultivar TAG 24 at MARS, UAS, Dharwad. The dry pod yield increased due to increasing N/P ratios upto 0.78. The treatment receiving N/P fertilizer ratio of 0.57 (basal application of 20 kg N, 60 kg P2O5, 25 kg K2O ha-1 + foliar application of nitrogen @ 7 kg N ha-1 at 45 days after sowing and foliar application of nitrogen @ 7 kg N ha-1 at 60 days after sowing) recorded significantly higher dry pod yield (4361 kg ha-1), number of filled pods plant-1 (24.27), total number of pods plant-1 (29.53), 100 pod weight (135.33 g) and 100 kernel weight (41.16 g). This treatment also recorded significantly higher leaf area plant-1 (17.45 dm2), leaf area index (5.82), leaf area duration (136.54 days) and total dry matter production (39.36 g). The treatment receiving N/P fertilizer ratio of 0.70 (basal application of 18 kg N, 46 kg P2O5, 25 kg K2O ha-1 + foliar application of nitrogen @ 7 kg N ha-1 through urea at 45 days after sowing and foliar application of nitrogen @ 7 kg N ha-1 at 60 days after sowing) recorded higher kernel yield (3365 kg ha-1) and harvest index (0.42) and it was on par with the N/P fertilizer ratio of 0.57 (3340 kg ha-1 and 0.40, respectively).

Item Type: Article
Uncontrolled Keywords: Dry pod yield, Fertilizer ratios, Harvest index, Pod weight
Author Affiliation: Department of Agronomy, College of Agriculture, Dharwad University of Agricultural Sciences, Dharwad - 580 005, Karnataka, India
Subjects: Plant Production
Divisions: Groundnut
Depositing User: Mr B Krishnamurthy
Date Deposited: 04 Aug 2015 08:57
Last Modified: 04 Aug 2015 08:57
URI: http://eprints.icrisat.ac.in/id/eprint/13655

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