Avaliação da qualidade de raízes de cenouras em função do manejo da irrigação

Abstract

Different soil water tension values were tested to evaluate the effects on carrot yield of two drip irrigated carrot cultivars. The experiment was carried out at Lavras, in the State of Minas Gerais, Brazil (21o 14’ S, 45o 00’ W and 918.8 m), from July to October 2008. The statistical design used was randomized blocks with a factorial scheme 2 x 6, with four replications. The treatment levels were two carrot cultivars (hybrid Nayarit F1 and non hybrid Nantes) and six critical soil water tension levels (15, 25, 35, 45, 60 and 75 kPa). With the results, we concluded that the largest concentration of soluble solids of roots was obtained by the hybrid F1 Nayarit. The two variables studied (total soluble solids / acidity and pH) were affected by cultivars and the levels of soil water tension. The highest value of TSS / TA was obtained by the hybrid F1 Nayarit (18.60) when compared with cv Nantes (12,15). The maximum value found for the TSS / TA ratio was 62 kPa (hybrid cultivar) and 26 kPa (not hybrid cultivar), respectively.