GROWTH, YIELD AND QUALITY OF BARI TPS -I AS INFLUENCED BY NITROGEN AND VERMICOMPOST

Abstract

Nitrogen and vermicompost may affect the yield and quality (dry matter, specific gravity and TSS) of potato. In Bangladesh quality of potato is the main constraint for expansion of potato industry. To partially overcome this constraint an experiment was carried out in the research field, Sher-e-Bangla Agricultural University, Dhaka during the period from November, 2013 to February, 2014 to find out the growth, yield and quality of BARI TPS-I as influenced by nitrogen and vermicompost. The experiment was laid out in a split plot design with three replications. The experiment comprised with two factors viz. (i) nitrogen dose and (ii) vermicompost level. Four nitrogen doses (N 0 = 0 kg N ha -1 , N 1 = 100 kg N ha -1 , N 2 = 150 kg N ha -1 , N 3 = 200 kg N ha ) and four vermicompost level (Vm 0 = 0 t ha -1 , Vm 1 = 5 t ha -1 , Vm 2 = 10 t ha = 15 t ha -1 ). Nitrogen dose was placed along the main plot and vermicompost level was placed along the sub plot. The data on crop growth parameters like days to emergence, plant height, leaves plant -1 , SPAD value of leaves and stem diameter were recorded at different growth stages. Yield and quality parameter of tuber were recorded after harvest. Results revealed that, different levels of nitrogen had significant effect on most of the growth, yield and quality contributing parameters of BARI TPS-I. The treatment N (150 kg N ha -1 ) produced maximum yield (26.70 t ha -1 ) whereas, N ) showed minimum yield (18.53 t ha -1 0 ). Vermicompost levels also had significant effect on most of the growth, yield and quality contributing parameters of BARI TPS-I. The results showed that most of the parameters were increased with the increasing vermicompost levels. The treatment Vm

(15 t ha -1 ) produced maximum yield (26.03 t ha -1 ) which was statistically similar with Vm 2 (10 t ha -1 ) treatment whereas, Vm 0 -1 -1 , Vm 2 3 (0 kg N ha (0 t ha ) showed minimum yield (19.75 t ha -1 ).Treatment N 3 (200 kg N ha -1 -1 ) along with Vm

(vermicompost 10 t ha -1 )

performed the best results in terms of growth, most of the yield and quality parameters. -1 3 2