EFFECT OF INORGANIC AND ORGANIC (VERMICOMPOST) MANAGEMENT ON THE GROWTH AND YIELD POTENTIAL OF BORO RICE

Abstract

ABSTRACT The experiment was conducted at the experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from October 2015 to April 2016 to study the effect of integrated use of urea and vermicompost on the growth and yield potential of boro rice(BRRI dhan24). The experimental treatments included T = No chemical fertilizer, no organic manure (Control), T 2 =140 kg N ha -1 1 from urea, T =120 kg N from urea + 20 kg N substituted by vermicompost, T 4 3 =100 kg N from urea + 40 kg N substituted by vermicompost, T =80 kg N from urea + 60 kg N substituted by vermicompost, T 6 5 =60 kg N from urea + 80 kg N substituted by vermicompost, T =40 kg N from urea + 100 kg N substituted by vermicompost, T 8 7 =20 kg N from urea + 120 kg N substituted by vermicompost, T = 140 kg N substituted by vermicompost. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Results showed that different levels of nitrogen and vermicompost significantly increased contributing characters and yield of rice. The tallest plant (110.3 cm) was produced in 80 kg N from urea + 60 kg N substituted by vermicompost. The maximum total number of tiller and effective tiller hill -1 9 , Panicle length, number of filled grains panicle -1 also recoeded from the same treatment . The highest grain yield (6.86 t ha -1 ) was obtained from the same package. The minimum grain yield (2.35 t ha -1 ) was produced from control treatment. The highest N, P, K and S concentration in grain was recorded from 80 kg N from urea + 60 kg N substituted by vermicompost treatment. The highest N, P, K and S concentration in straw was recorded from 80 kg N from urea + 60 kg N substituted by vermicompost treatment. . The highest N, P, K and S uptake by grain and straw of boro rice was recorded from same combination (T 5 ).Thus the treatmen packageT (80kg N from urea+60kg N from vermicompost ) found as remunerative in augmending the yield of boro rice at the studied location (AEZ 28). 5