Residual effect of organic and inorganic amendments on nutrient uptake by rabi onion under coastal soil

Abstract

A field experiment was carried out at the Coastal Soil Salinity Research Station, NAU, Danti, Gujarat, duuring 2020–21 and 2021–22 to study the residual effect of organic and inorganic amendments on nutrient uptake by rabi onion under coastal soils. The field experiment consisted of different treatments viz., T1: Control (Without biocompost (BC) and gypsum), T2: Biocompost @ 10 t/ha, T3: Gypsum @ 50% GR, T4: Gypsum @ 50% GR + biocompost @ 10 t/ha, T5: Gypsum @ 75% GR, T6: Gypsum @ 75% GR + biocompost @ 10 t/ha, T7: Gypsum incubated biocompost @ 50% GR (BC @10t/ha) and T8: Gypsum incubated biocompost @ 75% GR (BC @10t/ha) were applied to proceeding kharif rice crop and their residual effect was studied on rabi onion. The study's findings showed that the total nutrient uptake (bulb and leaves) by rabi onion were recorded significantly higher with residual effect of gypsum incubated biocompost @ 75% GR (T8) followed by gypsum incubated biocompost @ 50% GR (T7) during both of the years of study and combined outcomes.