Abstract
A pot culture experiment was conducted to study the influence of salt stress on growth and yield component of four sugarcane varieties viz., C 92038, Co 85004, Si 94050 and Co 85036. The result of the study reveals that the growth parameter viz., LAI, LAD and CGR, RGR and SGR indicated that the derivation of LAI, CGR and SGR are the reliable growth parameters for assessing the genotypes for salt tolerance, as resistant genotypes Co 85004 and C 92038 performed better because of higher CGR, and SGR in present study. The important yield parameters viz., number of stalk per -1 , stalk length, number of inter nodes, inter nodal length, cane diameter and single cane weight were found to be affected under salt stress condition, which leads in overall yield reduction of 38.56 per cent in T2. However the extent of reduction was less in GA3 treated plants (18.50 %). Under salinity condition, the reduction in yield was less in C 92038 and Co 85004 (29.81 and 28.00 %) and it was found to be maximum in Co 85036 and Si 94050 (47.82 and 47.36 %). Irrespective of the genotypes, supplementing GA3 (150 ppm) as sett treatment and foliar application play role on imparting salt tolerance in terms of getting better growth and cane yield. Keywords: Sugarcane salinity, CGR, RGR, SGR, GA3, resistant and susceptible.
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