Limitation Due to Nutritional Deficiency and Excess in Sugarcane Using the Integral Diagnosis and Recommendation System (DRIS) and Nutritional Composition Diagnosis (CND)

Abstract

ABSTRACT The phenological growth cycles of sugarcane culture causes variations in the nutritional requirement. Due to these variations, leaf diagnosis can avoid limitations due to deficiency and excess of nutrients most demanded by sugarcane culture. The aim of this study was to establish the order of limitation of nutrients nitrogen (N), phosphor (P), potassium (K), calcium (Ca), magnesium (Mg), súlfur (S), boron (B), copper (Cu), iron (Fe), manganese (Mn), zinc (Zn) that limit sugar cane productivity by nutritional deficiency and excess cane-plant cycle (2013) and first stump (2014), using the Diagnosis and Recommendation System (DRIS) and the Nutritional Composition Diagnosis (CND) method. The database was created based on productivity and leaf nutrient content for sugarcane, considering the cane-plant (2013) and first stump (2014) cycle, making a total of 1.224 samples, composed of an average reference population of 172 t ha−1. A descriptive analysis of the data was carried out to establish the order of limitation of nutrients N, P, K, Ca, Mg, S, B, Cu, Fe, Mn, Zn. The DRIS and CND methodology in the cane-plant and first stump cycle. Nutritional deficiencies, excesses and balance were recognized by negative, positive and close to zero indices, respectively. The results indicated that the methods of the Comprehensive Diagnosis and Recommendation System (DRIS) and the Nutritional Composition Diagnosis (CND) method can be used to identify nutritional limitations that are responsible for nutritional imbalance and that can lead to low productivity of crops sugar cane. Being important future research in other cultures of economic interest.