Produtividade e estado nutricional da beterraba em função de diferentes doses de nitrogênio

Abstract

The objective of this work was to evaluate the influence of nitrogen doses applied via fertirrigation on the morphological characteristics, nutritional composition and productivity of sugar beet (Beta vulgaris L.), using the same reference evapotranspiration depth (100% of Eto), associated with four repetitions of urea doses (25 g m-2 and 30 g m-2), applied every two weeks through the FertiPet mechanism. The experiment was implemented at the Federal University of Grande Dourados, with soil preparation performed 30 days before the experiment. The sown variety was of the Sakata brand, known as the Kestrel hybrid, and has a cycle of 70 to 110 days. The evaluated variables were: neutral detergent fiber (NDF) and acid fiber (ADF), crude protein (CP), soluble solids (SS), ash, water content, productivity (Prod), plant height (AP), length of leaves (CF), root diameter (DR), leaf fresh mass (MFF), root fresh mass (MFR) and leaf dry mass (MSF). The data obtained were submitted to analysis of variance and regression studies. It is concluded that to obtain maximum beet productivity under the conditions tested, a total dosage of 120 g m-2 of N in the form of urea, applied via fertirrigation, is necessary.