FEASIBILITY OF REDUCING CHEMICAL FERTILIZER BY USING ORGANIC FERTILIZER IN LENTIL

Abstract

The experiment was conducted at the experimental field of Sher-e-Bangla Agricultural University, Dhaka during the period from November 2015 to March 2016 to study the feasibility of reducing chemical fertilizer by using organic fertilizer in lentil. The experiment comprised of 11 treatments, such as T 0 : Control condition; T : All chemical fertilizers as recommended dose (RD); T 2 1 : Cowdung as RD + 75% chemical fertilizer as RD; T : Cowdung as RD + 50% chemical fertilizer as RD; T II

4 3 : Cowdung as RD + 25% chemical fertilizer as RD; T 5 : Vermi-compost as RD + 75% chemical fertilizer as RD; T : Vermicompost as RD + 50% chemical fertilizer as

RD ; T : Vermi-compost as RD + 25% chemical fertilizer as RD; T 8 7 : Poultry Manure as RD + 75% chemical fertilizer as RD and T : Poultry Manure as RD + 50% chemical fertilizer as RD and T 10 9 : Poultry Manure as RD + 25% chemical fertilizer as RD. The experiment was laid out in Randomized Complete Block Design (RCBD) with three replications. Data on different growth characters and yield were recorded. Among the treatments, all chemical fertilizers as recommended dose (T ) was found superior considering all yield contributing characters (grain yield, stover yield) and yield. The treatments T (Vermi-compost as RD + 75% chemical fertilizer as RD) and T 8 5 (Poultry Manure as RD + 75% chemical fertilizer as RD) also showed statistically similar results in respect of grain yield and most of the yield contributing characters. So, it is possible to reduce the use of chemical fertilizers by combined use of organic and chemical fertilizers without significant yield loss in lentil.