| Titles |
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English :
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Yield and quality of sugar beet as affected by bio and mineral N-fertilization
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Arabic :
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تأثير التسميد النيتروجينى الحيوي و المعدني على محصول وجودة بنجر السكر
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| Abstract |
Two field experiments were conducted during two successive seasons (2002 / 2003 and 2003 / 2004), to find out the effect of inoculation with some N2-fixing bacteria, namely Azotobacter chroococcum and Bacillus polymyxa under different levels of mineral nitrogen (0, 40 and 80 Kg N / fed) on sugar beet yield, juice quality and enzymatic activities (nitrogenase and dehydrogenase of its rhizosphere soil).
Results indicated that bacterial inoculation for sugar beet seeds led to insignificant increases in root fresh weight and root dimensions at harvest. Meanwhile, bacterial inoculation caused significant increases in root and sugar yields. Bacillus inoculation with 40 Kg N /fed gave root and sugar yields as those obtained by addition of 80 Kg N / fed. Furthermore, Bacillus inoculation along with the addition of the full N-dose (80 kg N/fed) gave a significant increase which amounted to 18 and 39 % in root yield and sugar yield respectively in the first season compared to application of 80 kg N / fed alone. However the highest sugar yield was recorded due to the addition of 80 Kg N/fed along with biofertilization with Bacillus polymyxa in both seasons.
Regarding to juice quality of sugar beet, data revealed that neither bacterial inoculation nor nitrogen addition affected the total soluble solids (T.S.S.), sucrose and purity percentage in both seasons. Moreover, the obtained results indicated that both of nitrogenase (N2-ase) and dehydrogenase (DHA) activities were significantly increased when seeds were inoculated with N2-fixing bacteria, specially with Bacillus polymyxa. However, application of N-fertilizer was without significant influence in this respect. The obtained results draws attention to the importance of inoculating seeds of sugar beet with Bacillus polymyxa which played a complementary role with mineral N fertilization in maximizing sugar yield/fed
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| Publication year |
2005
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| Pages |
416-433
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| Availability location |
9 ش الجامعة -جيزة Soils, Water and Environment Research Institute, ARC
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| Availability number |
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| Organization Name |
Soil, Water and Environment Research Institute (SWERI)
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| City |
Zagazig
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| serial title |
Egyptian Journal of Applied Sciences
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| ISSN |
1110-1571
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| Department |
Agricultural Microbiology Research
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| Author(s) from ARC |
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| Agris Categories |
FertilizingSoil biology
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AGROVOC
TERMS |
Azotobacter.
Bacillus polymyxa.
Nitrogen fertilizers.
Nitrogenase.
Oxidoreductases.
Sugarbeet.
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| Publication Type |
Journal
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