YIELD AND QUALITY OF SUGAR BEET AS AFFECTED BY NITROGEN SOURCE AND ZINC FERTILIZATION UNDER SALINE SOIL CONDITIONS | ||||
| Fayoum Journal of Agricultural Research and Development | ||||
| Article 8, Volume 28, Issue 2, July 2014, Page 92-110 PDF (727.76 K) | ||||
| Document Type: Research articles. | ||||
| DOI: 10.21608/fjard.2014.193703 | ||||
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| Author | ||||
| Enan S.A.A.M | ||||
| Sugar crop Res. Inst., Agric. Res. Center, Giza, Egypt. | ||||
| Abstract | ||||
| Two field experiments were conducted at El-Sirw Agricultural Research Station, Damietta Governorate (latitude of 31.140 N and longitude of 31.390 E) during the two seasons 2011/2012 and 2012/2013 to investigate the effect of different sources of nitrogen and zinc levels on growth, yield and quality of sugar beet crop (Beta vulgaris var. saccharifera, L.) grown in saline soil conditions. The present work included eighteen treatments, which were the combinations of six nitrogen source including the sole application of urea (46.5% N), ammonium nitrate (33.5% N), ammonium sulfate (20.6 % N and 24 S%); combined application of 50:50% of urea and ammonium nitrate and 50:50% of urea and ammonium sulphate as well as 50:50% of ammonium nitrate and ammonium sulphate, in addition to three foliar applications of zinc (without zinc, control), 1000 and 2000 ppm as zinc sulphate (22% zinc). The obtained results showed that fertilizing sugar beet using the sole application of ammonium nitrate and mixture of ammonium nitrate + ammonium sulphate at ratio of 50:50 as nitrogen source produced significant higher root length, diameter, top, root fresh weight, sucrose%, quality %, calcium, magnesium, nitrogen, phosphorus, zinc contents in leaves and zinc uptake in roots as well as root, top and sugar yields/fed compared with that recorded by the other N sources. Results showed that higher values of root length, diameter, root and top fresh weight/plant, root, top and sugar yields/fed, sucrose% and zinc concentration in root and leaves (ppm) were obtained with increasing foliar zinc application up to 2000 ppm. The interactions among nitrogen sources and zinc levels significantly affected root, top fresh weight/plant and root yield/fed, where the mixture of ammonium nitrate + ammonium sulphate at ratio of 50:50 in addition to 2000 ppm zinc as foliar application gave the highest value of root, top fresh weight/plant and root yield/fed in both seasons compared with the other nitrogen sources. | ||||
| Keywords | ||||
| Nitrogen source; zinc; saline soil | ||||
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