Response of sugar beet plants to nitrogen and potassium fertilization in sandy Calcareous soil
2009
Abdel-Motagally, F.M.F. (Assiut Univ. (Egypt). Agronomy Dept.) | Attia, K.K. (Assiut Univ. (Egypt). Soil and Water Dept.)
This study was conducted during two successive seasons (2004-2005 & 2005-2006) to study the effects of different rates of nitrogen (143, 214 & 285 kg N per ha) and potassium (0, 57 & 114 kg K2O per ha) fertilization on yield, quality and nutrient contents of sugar beet grown on sandy calcareous soil. In this split plot design, the main plots were assigned to levels of N fertilizer and K levels were arranged too random as the sub-plots. The results showed that increasing N and K rates significantly increased root and foliage fresh and dry weight and sugar yield (ton per ha) of sugar beet plants. Adding the highest level of K (114 kg K2O per ha) under different rates of N significantly increased sucrose contents, recoverable sugar yield (ton per ha) and some quality traits. Adding the highest level of N (285 kg N per ha) under different rates of K significantly increased sugar loss (ton per ha) and increased content and uptake of N a nd K in both root and foliage of sugar beet over two seasons. Increasing N level up to 285 kg N per ha (under 0.0 kg K2O per ha) significantly increased impurities (Na, K & alpha-amino-N) and sugar loss percentage. In crux, N fertilizer at a level of 285 kg N/fed accompanied with 114 kg K2O per ha were the most effective in improving yield, quality and nutritional status of sugar beet grown in a sandy calcareous soil.
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