Vol. 11, Issue 4 (2022)

Author(s):
Saurabh Sharma, SC Vimal, RK Singh and Harshit Gupta

Abstract:
Increasing severity of high temperature worldwide presents an alarming threat to Mustard in India as late planting of mustard is very common due to the wide spread intensive cropping system particularly in north-west India. As a result, mustard crop has to face the problem of terminal heat stress. It causes a series of morphoanatomical, physiological and biochemical changes, which affect plant growth and development and results in reduced yield. However, there are various strategies for yield improvement under high temperature stress after anthesis in mustard. Investigation entitled “Studies on terminal heat mitigation in Indian mustard (Brassica juncia L.)” was carried out during rabi 2020-21 at Stundent’s Instructional Farm of Acharya Narendra Deva University of Agriculture and Technology, Kumarganj, Ayodhya (Uttar Pradesh). The experiment was conducted with NDR-8501. Seeds were sown in three different dates D1 (15th October), D2 (30th October) and D3 (15th November) with heat inducing chemicals. Data pertaining to different parameters were collected at regular intervals. It was observed optimum date for sowing of NDR-8501 was observed as 30 October under Ayodhya district of eastern Uttar Pradesh (North Indian) condition. In case of heat inducing chemicals the higher growth components, seed yield and its contributing traits were recorded when applying of salicylic acid (800ppm) followed by salicylic acid (400ppm) and KNo3 (0.3%). Interaction effect between date of sowing and heat inducing chemicals was also observed. As the sowing delayed, seed yield and its contributing traits was poor performance due to terminal heat stress. Thus by applying heat inducing chemicals, the seed yield could be substituted even delaying in sowing by the month of November and vice-versa.