INTEGRATED EFFECTS OF NITROGEN AND SULFUR ALONG WITH POULTRY MANURE ON THE GROWTH, YIELD, AND NUTRIENT CONTENTS OF RICE

Abstract

The experiment was conducted in the farm of Sher-e-Bangla Agricultural University, Dhaka. Bangladesh during the period from August to December 2012 to study the effect of various combinations of organic manure and inorganic fertilizer on the growth, yield, chlorophyll and nutrient content of BRRI dhan33. The experiment consists of the following treatments : 100% Inorganic fertilizer (Recommended dose) ± 5 ton poultry manure/ha , 12: 75 % N of recommended dose + 5 ton poultry manure/ha, T3: 50% N of recommended dose + 5 ton poultry manure/ha, T4: 25 % N of recommended dose + 5 ton poultry manure/ha, Tç: 75 % S of recommended dose + 5 ton poultry manure/ha. Tb: 50% S of recommended dose + 5 ton poultry manure/ha. 17: 25 % S of recommended dose ± 5 ton poultry manure/ha. i's: 100% Inorganic fertilizer and 19: 5 ton poultry manure/ha. With these 9 treatments, the experiment was laid out in a randomized complete block design (RCBD) with three replications. Significant variation was found in growth and yield parameters as well as in chlorophyll content and nutrient content of Aman rice due to the effect of various treatments. For most of the growth parameters (among plant height, leaf length and diameter, leaf number and total tiller per plant), better results were found in 100% Inorganic fertilizer + 5 ton poultry manure/ha which was statistically similar with 75 % of recommended dose of S + 5 ton poultry manure/ha, 75 % of recommended dose of N + 5 ton poultry manure/ha and followed by 50 % of recommended dose of S + 5 ton poultry manure/ha respectively while the lowest results were from 5 ton/ha poultry manure treatment. On the other hand, significantly higher chlorophyll 'a", "b" and total chlorophyll content were recorded in 100% Inorganic fertilizer + 5 ton poultry manure/ha and it was closely similar with 75 % of recommended dose of N + 5 ton poultry manure/ha and lowest values were recorded in 5 ton/ha poultry manure treatment. Number of eflèctive tillers plant", panicle length, number of rachis plant", filled grain plant" and fresh weight of plant were highest in 100% Inorganic fertilizer + 5 ton poultry manure/ha and it was either statistically similar or closely followed by 75 % of recommended dose of S + 5 ton poultry manure/ha. Significantly higher grain yield (4.18 t ha") was recorded in T (100% Inorganic fertilizer+ 5 ton poultry manure/ha) which was statistically similar with 15(75% of recommended dose of S + 5 ton poultry manure/ha) (4.13 ha"). Better result was also given by T2 (75 % of recommended dose of N + 5 ton poultry manure/ha) (4.05 t ha'). Lowest grain yield (3.67 t ha") was found from the treatment using sole poultry manure (T9 : 5 ton/ha). Similarly. N content in grain and N, K content in straw were also higher in l00% Inorganic fertilizer + 5 ton poultry manure/ha treatment followed by 75 % of recommended dose of N + 5 ton poultry manure/ha compared to other fertilizer treatments. S content in grain and P. S content in straw were higher in 75 % of recommended dose of S + 5 ton poultry manure/ha compared to other fertilizer treatments. Lowest N and S content in grain and N, P. K, S content in straw were found from the treatment using poultry manure only (19 : 5 ton/ha).