Agrometeorological Indices and Phenological Behaviour of Mustard (Brassica Juncea) Cultivars under Different Growing Environments at Allahabad

A field experiment was carried out at Sam Higginbottom University of Agriculture, Technology and Sciences, Allahabad during Rabi season of 2016-17, to study agrometeorological indices and phenological behaviour of mustard (Brassica juncea) cultivars under different growing environments at Allahabad climatic conditions. The main plot treatments consisted three date of sowing (D1-25th October, D2-5th November and D3-15th November) and sub plot treatments consisted three cultivars (V1- Parasmani, V2- Varuna and V3- SRM 777) using split plot design. The results revealed that delayed sowing reduced the length of phenophases in all cultivars. The crop duration was shortest in 25th October as compared to 5th November and 15th November. Among cultivars, the total crop duration was longest in SRM 777 followed by Varuna and Parasmani. Among agrometeorological indices GDD, HTU and PTU requirement were higher in 25th October followed by 5th & 15th Nov. sown crop. In delayed sown crop, higher day and night temperature during reproductive phase leads to forced maturity and reduced the total GDD requirement. The crop sown on 25th October was most efficient in thermal and radiation utilization in comparison with delayed sown crop. Among the cultivars, SRM 777 consumed highest GDD at 25th October as compared to other cultivars and it delayed as per growing environment. 25th October is ideal planting window for increasing yield potential of mustard followed by 5th & 15th November due to efficient utilization of available resources.