EFFECT OF POULTRY MANURE AND FARMYARD MANURE WITH AND WITHOUT CHEMICAL FERTILIZERS ON THE GROWTH AND YIELD OF BRRI DHAN28

Abstract

A field experiment was conducted at the Agrotechnology Field Laboratory of Khulna University, Khulna during boro season of 2005 to find out the effects of poultry manure (PM) and farmyard manure (FYM) in presence and absence of chemical fertilizers on BRRI dhan28. The experiment was laid-out in a randomized complete block design with three replications. There were ten treatments viz. T1: 100% RFD (Recommended fertilizer doses), T2: 100% RFD+10 t FYM, T3: 100% RFD+ 5 t FYM, T4: 50% RFD+5 t FYM, T5: 10 t FYM, T6: 100% RFD + 5 t PM, T7: 100% RFD+ 2.5 t PM, T8: 50% RFD+ 2.5 t PM, T9: 5 t PM and T10: Control (without manures and fertilizers). The doses of inorganic fertilizers N, P, K, S and Zn were 80, 50, 40, 10 and 5 kg ha-1. All the combined application of manures and fertilizers significantly increased the plant height, number of tiller hill-1, dry matter hill-1, grain and straw yield over the control. The highest grain yield was recorded in 100% RFD + 5 t PM treated plot which was similar to 100% RFD+10 t FYM treated plot, while the lowest yield was recorded in the control. Half of the recommended doses of fertilizer with 5 t ha-1 farmyard manure or 2.5 t ha-1 poultry manure produced statistically similar grain yields as produced by RFD which indicates that 50% of the fertilizers can be replaced by PM or FYM without any loss of grain yield.