Effect of N-fixing Bacteria on Nitrogen Fertilizer Requirements for some Sugar Beet Varieties | ||||
| Journal of Plant Production | ||||
| Article 10, Volume 12, Issue 1, January 2021, Page 87-96 PDF (956.48 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2021.152023 | ||||
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| Authors | ||||
B. S. I. Makhlouf  1; E. H. S. El-Laboudy2; F. F. B. Abu-Ellail2
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| 1Agron., Res. Dept., Sugar Crops Res. Inst., Agric. Res. Center, Giza, Egypt | ||||
| 2Sugar Crops Res. Inst. (SCRI), Agric. Res. Center, 12619 Giza, Egypt (ARC) | ||||
| Abstract | ||||
| Two field trials were carried out at Tamiya Agricultural Research Station, (latitude of 29.58°N and longitude of 30.96°E), Fayoum Governorate,Egypt, during 2018/2019 and 2019/2020 seasons to study the relative importance of nitrogen-fixing bacteria i.e. Bacillus polymyxa (BC)and Azospirillum brasilense(AZS) as a soil drench under mineral nitrogen fertilizer levels and their effects on some sugar beet varieties. A split-plot design was used. Four treatments of nitrogen fertilization (80 kg N/fed ”control”, 60 kg N/fed + soil drench with BC, 60 kg N/fed + soil drench with AZS and 60 kg N/fed + soil drench with a mixture of BC and AZS) were occupied the main plots, whereas, six varieties (Beta303, Sirona, Panther,Des9003, Athospoly and Maximus) were distributed randomly in the sub-plots. Adding 60 kg N/fed + soil drench with a mixture of AZS and BC was adequate to produce the economical values of extractable sugar%, root and sugar yields/fed. Varieties Sirona and Maximus had the highest values of root and sugar yields/fed. Significant interactions effects among nitrogen treatments and varieties on the studied traits were discussed. Root and sugar yields/fed were significantly and positively correlated with leaf area index and crop growth rate, root diameter and its fresh weight/plant, in both seasons. Under the environmental conditions of this study, it was found that sowing Sirona and/or Maximus varieties under fertilization of 60 kg N/fed in combination with a mixture of BC and AZS at 5L/fed twice as a soil drench could be recommended to achieve the economical root and sugar yields/fed. | ||||
| Keywords | ||||
| Azospirillum brasiliense; Bacillus polymyxa; fertilization; nitrogen; sugar beet; varieties | ||||
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