Response of pigeonpea (Cajanus cajan) to sources and levels of phosphorus under rainfed condition

Kumar, Avnish and Kushwaha, H.S. (2006) Response of pigeonpea (Cajanus cajan) to sources and levels of phosphorus under rainfed condition. Indian Journal of Agronomy, 51 (1). pp. 60-62.

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Abstract

A field experiment was conducted during rainy seasons of 1999 and 2000 to study the effect of sources and levels of phosphorus on productivity of pigeonpea [Cajanus cajan (L.) Millsp.]. Application of single superphosphate (SSP) produced significantly higher nodules/plant, dry weight of nodules/plant and pods/plant than that of diammonium phosphate (DAP). Application of SSP increased the seed yield, total P uptake and net returns over their respective DAP respectively by 6.1%, 0.53 kg P2O5/ha and Rs 913/ha. Phosphorus application increased the nodules/plant, dry weight of nodules/plant, pods/plant, seed yield, total P uptake and net returns significantly. Seed yield and net returns increased significantly with P levels up to 40 kg P2O5/ha, giving 52.4 and 18.3 % and Rs 6,757 and Rs 3,002/ha more over the control and 20 kg P2O5 respectively. Returns/Re invested was recorded more under 60 and 80 kg P2O5/ha (Rs 2.76), followed by 40 kg P2O5/ha (Rs 2.66). The agronomic P-use efficiency (APUE) and apparent P recovery were higher in SSP; however, these were recorded more at lower level of P and decreased with increase in P level. The physiological efficiency of phosphorus (PEP) and phosphorususe efficiency (PUE) were calculated more in DAP. However, PEP increased with increase in P level.

Item Type: Article
Author Affiliation: Department of Agronomy, Mahatma Gandhi Chitrakoot Gramodaya Vishwavidyalaya, Chitrakoot, Madhya Pradesh 485 331
Subjects: Plant Production
Social Sciences > Agricultural Economics
Divisions: Pigeonpea
Depositing User: Mr T L Gautham
Date Deposited: 28 Apr 2011 04:39
Last Modified: 28 Apr 2011 04:39
URI: http://eprints.icrisat.ac.in/id/eprint/1906

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