Elkhatib,, H., Gabr, S., Barakat, M., Bedawy, E. (2004). STATISTICAL MODELS FOR PREDICTING YIELD RESPONSE OF ONION (Allium Cepa L.) TO APPLIED NITROGEN AND BIOFERTILIZERS. Journal of Plant Production, 29(1), 357-369. doi: 10.21608/jpp.2004.238475
H. A. Elkhatib,; S. M. Gabr; M. A. Barakat; E. A. Bedawy. "STATISTICAL MODELS FOR PREDICTING YIELD RESPONSE OF ONION (Allium Cepa L.) TO APPLIED NITROGEN AND BIOFERTILIZERS". Journal of Plant Production, 29, 1, 2004, 357-369. doi: 10.21608/jpp.2004.238475
Elkhatib,, H., Gabr, S., Barakat, M., Bedawy, E. (2004). 'STATISTICAL MODELS FOR PREDICTING YIELD RESPONSE OF ONION (Allium Cepa L.) TO APPLIED NITROGEN AND BIOFERTILIZERS', Journal of Plant Production, 29(1), pp. 357-369. doi: 10.21608/jpp.2004.238475
Elkhatib,, H., Gabr, S., Barakat, M., Bedawy, E. STATISTICAL MODELS FOR PREDICTING YIELD RESPONSE OF ONION (Allium Cepa L.) TO APPLIED NITROGEN AND BIOFERTILIZERS. Journal of Plant Production, 2004; 29(1): 357-369. doi: 10.21608/jpp.2004.238475
STATISTICAL MODELS FOR PREDICTING YIELD RESPONSE OF ONION (Allium Cepa L.) TO APPLIED NITROGEN AND BIOFERTILIZERS
1Horttculture Dept., Faculty of Agric., Damanl'lour, AJex. University
2HorticultIJre Dept., Faculty 01 Agric., Elfayom, Cairo University
3Experts Dept., Ministry of Justice, Oamanhour, EI-Behira
Abstract
Two field experiments were conducted during the two successive winter seasons of 1 ~99/2000 and 2000/2001 to evaluated the effect of three commercial biofertilizers: 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) with different nitrogen fertilizer levels (0.18,36,54.72 and 90 kg N fed:') on bulbs yield 0 f 0 nion (Allium cepa L.) cv. giza 20 and its component ( total bulb yield ton fed", marketable bulb weight (g), Average bulb weight (g), and average bulb diameter (cm).
Generally, addition of 72 kg N fed:' combined wtth Halex-2 biofertilizer was sufficient and adequate to produce maximum and economic yield in both seasons. Four polynomial quadratic equations were established to express the response of onion bulbs yield to N fertilization and biofertilizers inoculation. The experimental yield values and the corresponding calculated values were not significantly different as tested by the standard error of estimates SE and high values of correlation coefficient (R). NoPI. 'and corresponding YOP'. were calculated for both years and the data revealed that the N fertilization application was more profitable when applied to onion seedlings with the biofertilizer Halex-2 as indicated by highest values of net returns compared with the other treatment combinations.
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