EFFECT OF DIFFERENT ORGANIC MANURES ON THE MORPHOPHYSIOLOGICAL ATTRIBUTES AND PRODUCTIVITY OF AMAN RICE

Abstract

An experiment was conducted at the Sher-e-Bangla Agricultural University during the period from aman season (June-December 2013) with a vicw to study the effect of different organic manures and chemical fertilizers on the morphophysiological and yield contributing characters of transplant anian rice cv. BRRldhan54. There were several treatments viz. T 1 =Control, T=Recommended dose of NPK , T 3 =Green manure +1/2 recommended dose of NPK, T 4 Green manure -r2/3 recommended dose of NPK, T5 =Poultry manure +1/2 recommended dose of NPK, T= Poultry manure ±2/3 recommended dose of NPK, T7=Cowdung +1/2 recommended dose of NPK. T= Cowdung +2 /3 recommended dose of NPK, T9 =Quick compost +1/2 recommended dose of NPK, T10= Quick compost +2 /3 recommended dose of NPK, T11 =Vermicompost +1/2 recommended dose of NPK, T 12= Vermicompost +2/3 recommended dose of NPK, T1 = Magic growth +1/2 recommended dose of NPK, T 14 =Magic growth +2/3 recommended dose of NPK. The experiment was laid out in a RCBD design with three replications. All the plant growth and yield contributing characteristics were affected at different treatments. Maximum plant height was attained in T14 treatment (Magic growth +2/3 recommended dose of NPK). T12 treatment (Vermicompost +2/3 recommended dose of NPK) produce highest tillers hili'.dry weight, effective tillers hi1l, panicle length, number of filled grain panic1e, 1000 grain weight, straw yield, grain yield except harvest index, number of unfilled grain panicle', and non effective tillers hilL Higher harvest index was found in T 7 treatment (Cowdung + 1/2 recommended dose of NPK). Unfilled grain panicle', and non effective tillers hill1 were better in untreated plot. Benefit cost ratio was highest in T2 recommended dose of NPK. Net

return was highest in T2 .Significantly the highest grain yield was found in (5.95 t ha') by the T12 treatment (Vermicompost +2/3 recommended dose of NPK) and lowest grain yield was found (3.80 t had ) in control or without fertilization. So. T12 treatment (Vermicompost +2/3 recommended dose of NPK) is the best treatment with combined application of inorganic fertilizers other than poultry manure, green manure, cowdung, magic growth, quick compost and solitary application of inorganic fertilizer.