T. RAGHAVENDRA*, P. SUDHAKAR, P. SANDHYA RANI, V. JAYALAKSHMI
AND B. RAVINDRA REDDY
Department of Crop Physiology, S.V. Agricultural College, ANGRAU, Tirupati.
A field experiment was conducted at Regional Agricultural Research Station, Nandyal during rabi season of 2018-19 and 2019-20 to find out optimum time of sowing and suitable genotypes of chickpea in scarce rainfall zone of Andhra Pradesh. The experiment consisted of three sowing dates 1st FN of October, 1st FN of November and 1st FN of December and fifteen genotypes was laid out in factorial randomized block design with three replications. Among the genotypes, desi genotypes are NBeG 47,NBeG 49, JG 11, Jaki, NBeG 452, NBeG 738, NBeG 776, NBeG 779, NBeG 857, and kabuli types are NBeG 119, NBeG 399,NBeG 440, NBeG 458, Vihar and KAK2. Results revealed that desi genotypes, NBeG-779 recorded higher total drymatter and in kabuli genotypes, NBeG-440 recorded higher total drymatter. Among the dates of sowing, 1st fortnight of November (D2) recorded higher total drymatter. Higher total dry matter in November sowing can be due to higher accumulation of GDD during flowering and pod development stage and higher GDD and PTU during the grain filling stage compared to other two sowings. The genotypes which recorded higher yields i.e NBeG-779 (1811 kg ha-1) desi genotype and NBeG-440 (1662 kg ha-1) kabuli genotype also recorded highest HUE values of 0.93 kg ha-1 oC day-1 and 0.77 kg ha-1 oC day-1 respectively. Similarly the genotypes sown during 1st FN of November recorded higher HUE followed by December and October sowings.
Chickpea, Growing degree days, Heat use efficiency