R. PAVANI,V. UMAMAHESH *, A.R. NIRMAL KUMAR AND Y.REDDI RAMU

Department of Crop Physiology, S.V. Agricultural College, ANGRAU, Tirupati- 517502, Chittoor Dt., Andhra Pradesh

ABSTRACT

A laboratory experiment was conducted in completely randomized design and replicated thrice with six popular aerobic rice genotypes i.e. MTU 1010, MTU 7029, JGL 20171, NLR33671, MTU 1075 and MTU 1112, at S.V. Agricultural College, Tirupati. Rice seeds were subjected to different concentrations of gibberillic acid viz., 200,500 and 1000 ppm and combination of both gibberillic acid and KNO3 treatments i.e. GA3 (200 ppm,500 ppm,1000 ppm + KNO3@3%), KNO3@3% and a control (Hydropriming/ Water soaking), in order to know the effect of seed priming on seedling vigour performance under direct seed method. Various physiological observations such as germination percentage, seedling length (cm) and seedling vigour index (SVI) were measured in all six genotypes.

KEYWORDS:

Gibberllic acid, KNO3, Seedling Vigour Index (SVI).