Due to the increased interest in bioenergy and 2G ethanol, sugarcane crop residue and bagasse from sugarcane have gained highlight in the sugar-energy scenario, but limited information at the level of variety are found about production potential of this residue, this so the aim of this study was to evaluate the potential production of sugarcane crop residue and bagasse 23 varieties of sugarcane under two levels of irrigation cultivated in 1 st and 2 nd ratoons. Two experiments were installed

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... conduced in a greenhouse at the Biosystems Engineering Department, ESALQ/USP, Piracicaba/SP. Experiment 1: nine varieties on a clay soil (RB855453, RB855536, RB925211, RB867515, SP89-1115, SP81-3250, CTC14, CTC8 e CTC6) and Experiment 2: 14 varieties on a sandy-loam soil (RB925345, RB855156, RB966928, RB72454, RB92579, IACSP95-5000, Caiana, SP83-2847, SP90-3414, SP79-1011, CTC17, CTC15, CTC9 e CTC2). In both experiments it was adopted two irrigation treatments: T100 -full irrigation with 100% crop evapotranspiration replacement and T70 -irrigation with 70% of water depth applied to T100 treatment. The irrigation management was carried out through drip irrigation by controlling the matric potential, with tensiometers installed at different depths for each variety individually. It was determined the dry biomass of sugarcane crop residue components, namely leaves, sheaths, topping and dead /senescent tillers. The dry weight of bagasse (BBAG) in t ha -1 was obtained analytically through the fiber and the estimated yield for the environment greenhouse. The average productivity BPAL, T100 treatment was 24.58 t ha -1 at the 1 st ratoon and 16.81 t ha -1 at the 2 nd ratoon. In the treatment T70 the average productivity of 1 st ratoon was 23 t ha -1 and 2 nd ratoon of 13.75 t ha -1 . The average productivity of BBAG, there was change of 7.9 t ha -1 to 24.90 t ha -1 in the 1 st ratoon, and variation of 3.6 t ha -1 to 14.9 t ha -1 in the 2 nd ratoon.