Barakat ,, M., Elkhatib, H., Gab, S., Bedawy, E. (2004). PLANT GROWTH CHARACTERS OF FIELD GROWN ONION (ALLIUM CEPA L.) AS AFFECTED BY NITROGEN APPLICATION AND BIOFERTILIZERS INOCULATION. Journal of Plant Production, 29(1), 345-356. doi: 10.21608/jpp.2004.238473
M. A. Barakat ,; H. A. Elkhatib; S. M. Gab; E. A. Bedawy. "PLANT GROWTH CHARACTERS OF FIELD GROWN ONION (ALLIUM CEPA L.) AS AFFECTED BY NITROGEN APPLICATION AND BIOFERTILIZERS INOCULATION". Journal of Plant Production, 29, 1, 2004, 345-356. doi: 10.21608/jpp.2004.238473
Barakat ,, M., Elkhatib, H., Gab, S., Bedawy, E. (2004). 'PLANT GROWTH CHARACTERS OF FIELD GROWN ONION (ALLIUM CEPA L.) AS AFFECTED BY NITROGEN APPLICATION AND BIOFERTILIZERS INOCULATION', Journal of Plant Production, 29(1), pp. 345-356. doi: 10.21608/jpp.2004.238473
Barakat ,, M., Elkhatib, H., Gab, S., Bedawy, E. PLANT GROWTH CHARACTERS OF FIELD GROWN ONION (ALLIUM CEPA L.) AS AFFECTED BY NITROGEN APPLICATION AND BIOFERTILIZERS INOCULATION. Journal of Plant Production, 2004; 29(1): 345-356. doi: 10.21608/jpp.2004.238473
PLANT GROWTH CHARACTERS OF FIELD GROWN ONION (ALLIUM CEPA L.) AS AFFECTED BY NITROGEN APPLICATION AND BIOFERTILIZERS INOCULATION
1Horticulture Dept., Faculty of Agric., Elfayom, Cairo University
2Horticulture Dept., Faculty of Agric., Damanhour, Alex. University
3Experts Dept., Ministry of Justice, Damanhour, EI -6ehira
Abstract
Two field experiments were carried out during the two successive winter seasons of 1999/2000 and 2000/2001 at the experimental farm. Faculty of Agriculture, Alexandria University in Damanhour, El-Behira govemorate. The objectives of this investigation was to study the main effects of Six N fertilizer levels (0, 18, 36, 54, 72 and 90 kg N fed") and three different biofertilizer types Microbein (a mixture of Azotobacter, Azospirillum , Pseudomonas, Rhizobium and Bacillus), Rhizobacterin ( a mixture of Azotobacter and Azospirillum) and Halex-2 (a mixture of Azotobacter, Azospiillum and Kebsiella) as well as their interaction on vegetative growth characters ,leaf chlorophyll contents and N content of storage leaves of onion (Allium cepa L.) cv. Giza 20. The obtained results indicated that application of mineral N, significantly increased plant length, plant fresh weight, leaves fresh weight plant", leaves dry weight plant" and I eaves d ry matter percentage over the untreated plants, in both seasons. Meanwhile application of N fertilizer irrespective of the level used, did not affect number of leaves plant". The highest two N rates 72 and 90 kg N fed" were remarkable and associated with the highest mean values for the most studied characters, but the differences between them were not found significant. Mean values of all the studied growth characters except leaves number, showed significant increments with the inoculated plants comparing with untreated ones. Moreover, Halex-2 application 0 f I he b iofertillzer r ellected the highest mean values r or a II the stcdled growth parameters, leaves chlorophyll content and storage leaves N content. Fertilization of onion plants with 72 or 90 kg N fed·1 combined with Halex-2 was the best interaction treatment for all the growth parameters.
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