EFFECT OF ORGANIC AND INORGANIC PHOSPHORUS ON THE YIELD AND NUTRIENT USE EFFICIENCY OF T. AMAN RICE

Abstract

A field study was conducted to evaluate the effect of combined use of organic and inorganic phosphorus (P) sources on yield contributing characters, yield and nutrient use et1iciency of T. Aman rice. Eight treatments including a control, a recommended doses of inorganic fertilizers and six other treatments which were combinations of inorganic and organic fertilizers where 50 % and 75 % of recommended doses of P were provided by using triple super phosphate (TSP) and the remaining 50 % and 25 % of P were amended by using either cowdung (CD), poultry manure (PM) or household waste (HW). The nutrient P as per treatments and nitrogen (N), potassium (K) and zinc (Zn) as per recommended dose were applied. Combined application of inorganic and organic sources of P significantly increased the yield and yield contributing characters ofT. Aman. The effect of PM was prominent than that of CD and HW. The treatment T. receiving 50 % P through TSP and 50 % P through PM produced the highest grain yield of T. Aman rice (4.34 tlha) and also showed the highest % recovery efficiencies (RE), agronomic et1iciencies (AE) kg/kg, physiological efficiencies(PE) kg/kg and internal efficiencies (IE) kg/kg of nitrogen(N) but failed to increase the physiological efficiencies(PE) kg/kg and internal efficiencies (IE) kg/kg of phosphorus(P).Thus, the present study indicated that the use of both organic and inorganic source of P is an effective way to enhance the yield and increase the nutrient use et1iciency (NUE) for T. Aman rice.