Vol. 17 No. 2
Effects of spatial and genotypic variability on heat and energy use efficiency in sugarcane under Tropical Indian conditions
Author(s): A. S. TAYADE, P. GEETHA, S. ANUSHA, R. ARUN KUMAR, C. PALANISAMY AND P. GOVINDARAJ
Abstract: The field experiment on effects of spatial and genotypic variability on heat use efficiency, energy use efficiency and sugarcane productivity was conducted during 2018 at ICAR- Sugarcane Breeding Institute, Coimbatore, Tamil Nadu, India.The results revealed that planting sugarcane at 120 cm row spacing recorded numerically higher cane yield (137.09 tha-1), heat use efficiency and energy use efficiency than 150 cm row spacing.The sugarcane genotype Co 12012 with 129460 NMC/ha registered significantly highest number of millable cane (NMC) than ruling Co 86032 (89670 NMC/ha) variety. Amongst sugarcane genotypes under study, highest values of 22.37, 22.05 and 98.55 for brix, sucrose per cent and purity per cent, respectively, were exhibited by CoC 671 sugarcane genotype. However, with 22.91 and 20.85 t/ha of CCS yield, VSI 12121 and Co 12012 showed better agronomic response and in addition to this there also recorded better heat use efficiency and energy use efficiency than the standard check sugarcane varieties Co 86032 and CoC 671. The present field experiment revealed the climate resiliency of VSI 12121 and Co 12012 sugarcane genotypes in terms of better juice qualities, superior heat use efficiency, energy use efficiency and enhanced cane productivity under wider row planting system in 120 cm row spacing under tropical Indian conditions.
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