Studies on Performance of Mid-Late Sugarcane Genotypes with Different Fertility and Spacing

Main reasons for lower cane yield are lack of high-potential varieties, limited irrigation resources, fertility, lack of awareness of plant geometry and technology. The most important factor is ability of genotypes to efficiently utilize the applied nutrients especially NPK. A field experiment was conducted during 2016-17 at research farm of G.S.S.B.R.I., Seorahi, Uttar Pradesh under AICRP(S). The experiment consisted of twenty eight treatment combinations. Seven genotypes/varieties i.e. V-Bo 155, V₂- CoSe 11453, V- CoSe 11454, V₄- CoSe 11455 and check varieties V₅- Bo 91, V₆-CoP 9301 and V₇- CoSe 93423, two fertility levels i.e. F_r100 per cent recommended dose of NPK, F-125 per cent recommended dose of NPK and two row spacing i.e. S_r90 cm row spacing and S₂-120 cm row spacing were tested in factorial randomized block design with three replications. Recommended dose of N: P: K ratio was 180: 80:60 kilogram ha^-1 and applied as per treatments recommendation. The experimental field was medium in organic carbon (0.50 per cent), medium in available phosphorus (14.43 kg/ha) and low in potash (83.90 kg/ha) with pH 8.11. Results revealed that all mid late tested genotypes recorded significantly higher germination, shoot population and NMC over all check varieties. Among mid late tested genotypes, CoSe 11453 (16.74 per cent) produced maximum value of sucrose per cent. Cane yield was recorded significantly higher in CoSe 11455 genotype (98.09 t/ha) followed by Bo 155 (83.85 t/ha), CoSe 11453 (82.85 t/ha) and CoSe 11454 (80.30 t/ha) as compared with check varieties. Effect of fertility levels on germination and NMC were found significantly higher in 125 per cent recommended dose of fertilizer as compared to 100 per cent recommended dose of fertilizer application. Effect of row spacing on germination, shoot population and NMC were recorded significantly lower but maximum value (16.53) of sucrose per cent was obtained in 120 cm row spacing.