Effect of sulphur on growth, yield and economics of sesame (Sesamum indicum)

Abstract

The productivity of sesame is mainly dependant on proper agronomic management practices including nutrient management. In oilseeds, sulphur plays a prominent role in the synthesis of essential oils, chlorophyll formation and gives pungency in oil. It is also increasing drought and cold resistance of oilseed crops. Hence, field studies were conducted for two consecutive years to study the effect of various sources of sulphur (Gypsum and Sulphur Bentonite) and their different levels (15, 30 and 45 kg S ha-1) on growth, yield and economics of sesame. Studies revealed that, irrespective of sources of sulphur seed yield increased progressively with increase in sulphur dose from 15 to 45 kg ha-1 and the increase was significant at 45 kg ha-1 over 15 kg ha-1and control. Application of sulphur at 45 kg/ha through gypsum produced significantly higher plant height (97.1 cm), branches/plant (4.98), capsules/ plant (95.9) and seed yield (586.5 kg/ha) than at 15 kg S/ha through gypsum, Sulphur bentonite and recommended NPK and remaining at par with application of Sulphur at 30 kg/ha. Sulphur application at 45 and 30 kg ha-1 through gypsum recorded significantly higher net returns (Rs. 33365 and 31963 ha-1 respectively) and B: C ratio (2.47 and 2.38 respectively) than Sulphur Bentonite and recommended NPK during both the years.