Contribution of bio-and mineral nitrogen fertilization in sugarbeet yield.
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CONTRIBUTORS:
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JOURNAL:
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Alex. Sci. Exch.,
21(2),
129 -
143.
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YEAR:
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2000
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PUB TYPE:
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Journal Article
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SUBJECT(S):
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Contribution of bio-and mineral nitrogen fertilization in sugarbeet yield.
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DISCIPLINE:
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Agricultural and Food Sciences
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HTTP:
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http://www.freewebs.com/sugarbeet_egypt_eng
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LANGUAGE:
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English
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PUB ID:
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103-431-001
(Last edited on
2006/11/16 14:33:24 US/Mountain)
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SPONSOR(S):
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ABSTRACT:
Two field experiments were conducted in calcareous soil during the two successive winter seasons 1998/1999 and 1999/2000 in Nubaria Agricultural Research Station to study the contribution of Halex as a biofertilizer and mineral nitrogen fertilizer in sugarbeet yield of the two cultivars Gala and Pleno. Eight polynomial quadratic equations were established to express the relationship between yield values of the two seasons and increment of nitrogen fertilizer with and without the biofertilizer inoculation. The following results were obtained:
1- Sugarbeet yield of the two cultivars significantly increased with increments of nitrogen fertilizer when compared with the control.
2-Sugarbeet yield of the two cultivars when treated with the biofertilizer generally was higher than the untreated treatment.
3- The optimum rates of nitrogen fertilizer were calculated and found to be 1.656 and 1.461 N unit ha-1 for Gala and 1.556 and 1.430 N unit ha-1 for Pleno cultivar in the first and second seasons, respectively. The optimum rates of nitrogen fertilizer plus Halex treatment were calculated and found to be 1.440 and 1.430 N unit ha-1 for Gala and 1.150 and 1.440 N unit ha-1 for Pleno cultivar in the first and second seasons, respectively. (N unit ha-1 = 156 Kg N ha-1).
4- The optimum yield of the two cultivars with the Halex biofertilizer were calculated and found to be 96.875 and 75.335 Mg ha-1 for Gala and 84.480 and 78.430 Mg ha-1 for Pleno cultivar in the first and second seasons, respectively. While without the Halex biofertilizer were 65.497 and 66.823 Mg ha-1 for Gala, 70.033 and 67.250 Mg ha-1 for Pleno cultivar in the first and second seasons, respectively.
5-The net returns per each Egyptian pound (L.E) spent on fertilization at optimum nitrogen rates with the Halex biofertilizer were 9.22 and 5.36 L.E/1L.E for Gala, 11.78 and 5.98 L.E/1L.E for Pleno cultivar in the first and second seasons, respectively, while without the Halex biofertilizer were 4.67 and 4.22 L.E/1L.E for Gala, 6.97 and 5.27 L.E/1L.E for Pleno cultivar in the first and second seasons, respectively.6-The N-biofertilizer contribution to the yield of Gala ranged from 15.61 to 22.75 and 5.83 to 9.57 Mg sugarbeet ha-1 for Gala and 5.53 to 13.61 and 3.78 to 6.53 Mg sugarbeet ha-1 for Pleno cultivar in the two seasons, respectively.
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