Relative efficiency of different sources of sulphur on yield and soil nutrient status in Kharif rice (Oryza sativa) Mishra Ambika Prasad, Dash Ashish Kumar, Panda Narayan*, Prusty Meenakhi, Sahu Suman G. Odisha University of Agriculture and Technology, Bhubaneswar, Orissa, India *Corresponding Author e-mail: npandasoils@gmail.com
Online published on 15 February, 2021. Abstract A field experiment was carried out in order to study the relative efficacy of different sources of sulphur in kharif rice (Cv. Swarna Sub 1) under mid-central table land zone of Odisha. It was carried out in RBD with 10 treatments and 3 replications. Four different sources of sulphur (Single Super Phosphate, Calcium Sulphate, Elemental S0 and Navaratna as (20-20-0-13) were used with two methods of application as basal & top dressing to rice crop during Kharif season. The treatment details consists as T1 = Control (No Sulphur), T2 = Basal application (B.A) of 30 kg S ha՜1 through Calcium Sulphate (CaSOJ, T3 = Basal application of 30 kg S ha−1 through Elemental S (ES), T4 = Basal application of 30 kg S ha՜1 (through SSP), T5 = Basal application of 30 kg S ha−1 (through 20-20-0-13), T6 = Twice application of 15 kg S ha՜1 as basal and top dressing through CaSO, T = Twice application of 15 kg S ha՜1 as Basal application & top dressing through ES, Tg = Twice application of 15 kg S ha՜1 through SSP each at Basal application & top dressing, T9 = Twice application of 15 kg S ha՜1 as Basal application and top dressing through (20-20-0-13) & T]g = Basal application of 30 kg S ha՜1 through CaSO4 and SSP @1:1 ratio. Significantly highest pooled mean grain yield (5.41 t ha՜1) and straw yield of (5.62 t ha՜1) were recorded with T7, whereas the lowest values were recorded with (control) T1 (4.1 t ha՜1 & 4.31 t ha՜1 respectively). Among different sources of sulphur, the grain yield of rice varied significantly and it followed the trend as Elemental Sulphur (ES) > CaSO4 > SSP > (20-20-0-13). Spilt application of sulphur fertilizer showed a beneficial effect on S uptake and translocation of micronutrients like Fe, Mn, and Zn. The sulphur economic yield efficiency ratio also inversely varied with S applications. Top Keywords Rice yield, Sulphur uptake, S economic yield efficiency ratio, Soil nutrient status. Top |