All India Co-ordinated Sorghum Improvement Project, IARI Regional Research Station, Rajendranagar, Hyderabad
Online published on 25 January, 2012.
With a view to obtain preliminary information on the genotype-yield-density relationships in sorghum an experiment was conducted in the ‘Fan Design’ suggested by Bleasdale (1967) with 17 densities varying from 36,000 to 7,17,000 plants/ha with two varieties of sorghum viz-, Swarna and 148 and a hybrid CSH-1. Three types of yield density relationships viz., the quadratic, the reciprocal quadratic and the Bleasdale's simplified equation have been fitted. It has been found that the three equations are equally satisfactory in providing a good fit to the yield-density data. It has been concluded that a plant population of at least 4,00,000 plants/ha in the case of Swarna and CSH-1 may be desirable although a still denser population has been indicated by one of the equations fitted. In contrast with this, it appeared that a plant population of about 2,50,000 plants/ha may be enough to realise maximum yields in the case of the variety 148.
