Vol. 12, Issue 7 (2023)

Author(s):
Rohit Kumar Kumawat, Gyanendra Tiwari, R Shiv Ramakrishnan, Supriya Debnath, Satyendra Thakur, Ankit Bharti, Parikha Prakash Singh, Divya Bhayal and Laita Bhayal

Abstract:
Field experiment was carried out to investigate the plant growth regulators and their application schedules affect growth, leaf area development and dry matter production under normal and late sown condition in wheat during the winter (rabi) seasons of 2020–21 and 2021–22 at Research Farm, Seed Technology Research Centre, Department of Plant Physiology, College of Agriculture, JNKVV, Jabalpur, Madhya Pradesh. The experiment included three sowing dates (D1-15 November, D2-15 December, and D3 - 15 January), three spray schedulings at various stages (A1-Vegetative stage, A2-Anthesis stage, and A3-Vegetative + Anthesis stage), and seven plant growth regulators (H1: Cycocel @ 1000 ppm, H2: Salicylic acid @ 400 ppm, H3: Salicylic acid @ 800 ppm, KCl @ 1%, H4: Ascorbic acid @ 10 ppm, H5: Thiourea @ 400 ppm, H6: Water spray and H7: Control) were replicated three times in a split plot design to create 63 treatment combinations. The result showed that when wheat is delayed in being sown, it faces high temperatures during the grain developing stage, which has a negative impact on leaf area, leaf dry weight, stem food reserves, and total dry weight at various stages of growth of wheat. By increasing leaf area, leaf dry weight, stem food reserve and total dry weight at various growth stages of wheat, foliar spraying of salicylic acid @ 400 ppm and KCl @ 1% individually with two spray schedules (at vegetative stage and anthesis stage) application along with other plant growth regulators has the potential to improve wheat growth.