Abstract
Efficiency of phosphorus in our soils is low. Present investigation was undertaken to assess the effect of organic (green manure (Sesbania), farmyard manure (FYM), poultry manure, press mud) and inorganic (DAP) amendments of P on three different soils. In a green house trial different efficiency fractions (agronomic efficiency (AE), physiological efficiency (PE) and recovery percentage (PR %)) of P were calculated. Farmyard manure was added @ 10 g kg-1 soil and other organic amendments of P were applied with respect to the carbon (C) contents of FYM. Chemical P as DAP was added to supply 35 mg P kg-1 soil. Treatments were equilibrated in triplicates. The dry matter production, P concentration and P uptake over control, were significantly increased in maize shoot by the integrated application of organic and inorganic P amendments. Regarding evaluation of various efficiency fractions of maize, agronomic efficiency and apparent P recovery rendered statistically more pronounced effects of integrating organic and inorganic P amendments over separate application of DAP. Similarly, agronomic efficiency, physiological efficiency and P recovery % of organic amendments of P, proved more efficient as compared to DAP. Results indicated that integration of organic amendments of P with inorganic source was significantly better over the separate use of DAP. Nevertheless, P application in all the soils, either separately or in integrated form, improved agronomic parameters of maize, and P uptake
F. Mujeeb1, Rahmatullah1, J. Akhtar1, R. Ahmad. (2010) Integration of organic and inorganic P sources for improving P use efficiency in different soils , The Journal Soil & Environment , Volume 29, Issue 2.
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