Vol. 11, Issue 9 (2022)

Author(s):
Shahana Begum, Shalini Pillai P, Jacob John and Sajeena A

Abstract:
The study was undertaken at Integrated Farming System Research Station (IFSRS), Karamana, Thiruvananthapuram, Kerala during the summer season of 2020-’21. Three rice genotypes, viz., Prathyasa, KAU Manu Rathna and Sharada were grown under three different water regimes (flooded, saturated and aerobic condition), with and without biofertilizer, Azospirillum lipoferum. The root parameters of these varieties were recorded at harvest. It was observed that the rooting depth, root dry weight, root volume and root shoot ratio were superior in the variety, Sharada while number of roots at crown region was more under Prathyasa. Similarly, these parameters, except number of roots at crown region, were the highest under aerobic condition in the presence of Azospirillum lipoferum. In contrast, the root mass density and root length density were the highest under flooded and saturated condition.