Abstract

RODRIGUEZ GROSS, Reynaldo et al. Yield performance study and maturity patterns modeling of new sugarcane cultivars. cultrop [online]. 2015, vol.36, n.4, pp. 134-143. ISSN 1819-4087.

The aim of the present work was to assess the performance of new sugarcane cultivars released by the Institute for Sugarcane Research (INICA), as well as to model and to classify its optimal maturity and harvest period. An experiment was carried out in the experimental field of the Territorial Station for Sugarcane Research “Oriente-Sur” under brown and rained soil conditions. Thirty-eight sugarcane cultivars were studied during two crop cycles (cane plant and first ratoon). The variables pol percentage in cane, t cane ha-1 and t pol ha^-1 were recorded in the whole harvest period (November-April). Data were analyzed using analysis of variance, multivariate techniques (AMMI models and clustering) and regression analysis. The best performance cultivars were C86-12, C88-297, C89-559, C90-469, C91-115, C91-522, C95-416, C97-445 and SP70-1284. Cultivars were classified according to its optimal period of maturity in the following harvest schedule groups: early, early-middle, middle, middle-late and later. In addition, it is showed sugarcane cultivars for harvesting in the complete period of harvest . The polynomial equation of second grade displayed the better adjustment for modeling maturity pattern of sugarcane cultivars during the harvest period

Keywords : maturity; AMMI; modeling.

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