Effect of Phosphorus Enriched Vermicompost on Growth and Yield of Groundnut (Arachis hypogaea L.) as Influenced by Soil Phosphorus use Efficiency

The experiment was carried out at the farm of Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, West Bengal from August to October of 2011-12 and 2012-13, respectively. To investigate the effect of phosphorus enriched vermicompost on yield of ground nut under irrigated conditions. The experiment was laid out in a RBD design with 14 treatments which replicated thrice. Highest pod yield was obtained from T7, that receiving 150% phosphorus through rockphosphate enriched vermicompost grade-I) (2400.50 kg ha-1) whereas, the treatment receiving 100% recommended dose through sole application of chemical fertiliser (T1) (1479.00 kg ha-1) was lowest yield. Dry matter accumulation increased significantly with crop age. Pooled data revealed that T7 (4402.86 g m-2) performed better in all sampling days. The lowest Dry matter accumulation was observed in T1 (1096.66 g m-2). The treatment T7 recorded the highest value (4.02) of LAI at 75DAS and thereafter declined towards maturity. The highest value of 100-pod weight ,100-kernel weights and harvest index were recorded in T7 respectively (93.22 gm) (63.56 gm) and. (44.04%).It was observed that haulm yield of T4 recorded highest value of haulm yield (3541.10 kg ha-1 )and T8 recorded lowest value of haulm yield (3159.00 kg ha-1) . Pooled data revealed that T7 has highest (86.43%) shelling out and T1 has the lowest value (57.84%). Among the Phosphorus use efficiency, Highest Partial factor of productivity and Agronomic efficiency were observed in T5 respectively (55.21 kg ha-1) and (29.99 kg ha-1). Apparent recovery was highest in T7 (306.46%) and maximum value of Physiological use efficiency was noticed in T3 (26.23 kg ha-1).