|Author:||El-Sarag, E. I.|
|Book Group Author:||NA|
Field experiments were conducted in Egypt, during the 2006/07 and 2007/08 cropping seasons, to determine the effect of 3 irrigation intervals (every 5, 8 and 11 days), 3 plant densities (20 000, 28 000 and 46 000 plants/fed, which resulted from 3 hill spacings, i.e. 35, 25 and 20 cm, respectively) and 4 nitrogen fertilizer rates (60, 80, 100 and 120 kg N/fed) on the growth, yield, juice quality and water relationships of multigerm sugarbeet cv. Farida. The soil texture was sandy clay with pH 7.44. A drip irrigation system with an average of 4100 ppm water salinity was used. The experimental unit area was 18 m2 (6 rows; 60 cm width × 5 m length) and the sowing dates were 20th and 25th of October in the 2 respective seasons. Results showed that increasing irrigation intervals from 5 to 11 days sharply reduced top fresh weight and consumptive use, while, irrigation every 8 days was superior in root and sugar yields as well as water use efficiency (WUE) in both seasons. However, 11-day treatment gave the highest sucrose percentage in both seasons and maximum purity percentage in the first season only. There were insignificant effects of plant density on juice purity, but the highest plant density (46 000 plants/fed) gave the maximum root fresh weight and sugar yield as well as WUE (kg sugar/m water) compared to the lowest densities. Increasing N fertilizer rates from 60 to 120 kg N/fed substantially improved most of the studied growth criteria and root yield as well as WUE. Meanwhile, adding 100 kg N/fed gave the optimum sugar yield and CU. The highest sucrose and purity percentage were gained with the lowest nitrogen fertilizer rate (60 kg N/fed). Irrigating sugarbeet every 8 days with plant density of 46 000 plant/fed and applying N fertilizer at 100 kg N/fed was recommended for maximum root and sugar yields as well as the most effective use of irrigation water under newly reclaimed soils of North Sinai Governorate.
|Pages:||155 - 167|
|Journal:||Bulletin of Faculty of Agriculture, Cairo University|
application rates, crop density, crop quality, crop yield,growth, irrigation, irrigation scheduling, nitrogen fertilizers, plantwater relations, spacing, sugarbeet, water use efficiency, Egypt, Betavulgaris var. saccharifera, Beta vulgaris, Beta, Chenopodiaceae,Caryophyllales, dicotyledons, angiosperms, Spermatophyta, plants,eukaryotes, North Africa, Africa, Mediterranean Region, Middle East,Developing Countries, watering, Field Crops (FF005) (New March 2000),Plant Water Relations (FF062), Plant Production (FF100), Fertilizers andother Amendments (JJ700)