Yield and Quality of Sugar Beet in Response to Levels and Times of Nitrogen Application and Foliar Spraying of Urea

(Abdul Rahim Abdul Rahim night, CM)

---

Abstract

Effects of N levels (120, 168 and 216 kg N ha-1), times of N application (½ N dose before the first irrigation (BFI) + ½ N dose before the second irrigation (BSI); ½ N (BFI) + ½ N before the third irrigation (BTI); 1/3 N (BFI) + 1/3 N (BSI) +1/3 N(BTI) and foliar spraying of urea (0, 1 and 2% concentrations) on root yield and quality of sugar beet “cv. Kawamira” were evaluated. Increasing N levels from 120 to 216 kg N ha-1 enhanced root yield and its components, while it resulted in marked reduction in yield quality (total soluble solids, sucrose and purity %). Timing of N application significantly affected most of yield characters. Adding nitrogen in two equal portions, 1/2 before the first irrigation (BFI) +1/2 N before the second irrigation (BSI), gave the highest root, top and sugar yields/ha-1. Foliar spraying of urea at 2 % concentration gave marked increases in root, top and sugar yields/ha-1. Application
PDF

References