Soil fertility, nutritional status, and sugarcane yield under two systems of soil management, levels of remaining straw and chiseling of ratoons

ABSTRACT Conservation management practices with minimum soil mobilization, maintenance of amounts straw in the soil, and chiseling ratoons interrows can be beneficial to quality, nutrition sugarcane yield; however, combination these their influence over culture cycle should better understood. This study aimed assess effects levels remaining cultivation on fertility, nutritional status yield stalks sugar one (five ratoons), under no-tillage conventional tillage systems. The was performed Dourados municipality, Mato Grosso do Sul, Brazil, areas a Oxisol (Latossolo) very clayey texture. Design randomized blocks adopted, four repetitions, subdivided portions scheme. Portions were composed (0, 50 100 %), annually, collected alternately odd years (0I) even (0P) established after plant harvest; sub-portions systems without chiseling. In fourth ratoon, leaf diagnosis made quantification macro-nutrient contents, during fifth ratoon samples for chemical analyses. By end cycle, accumulated yields determined. both systems, keeping % improved fertility kept higher while did not yield. use farming proved feasible corrected environments, reduce stalk Straw removal influenced nutrient regardless management.