EFFECT OF DIFFERENT SOURCES OF NITROGEN ON FLOWERING , YIELD AND FRUIT QUALITY OF SQUASH PLANTS. | ||||
| Journal of Plant Production | ||||
| Article 7, Volume 33, Issue 8, August 2008, Page 5681-5705 PDF (941.74 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2008.170374 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| E. A. Hassan1; M. A. Hassan2; O. F. Dakhly2; Mona N. Shehata2 | ||||
| 1Central Laboratory of Organic Agric., Agric. Res. Center, Giza, Egypt | ||||
| 2Faculty of Agriculture, Minia University, Egypt. | ||||
| Abstract | ||||
| Field experiments were carried out at farm of Research Center of Agriculture, Mallawy, EL-Minia Governorate, Egypt, during the two successive Autumn seasons of 2003 and 2004 . Squash Cv. "Eskandrany" was selected to study the influence of chemical N rates . organic manure and biofertilizers on yield of squash. Treatments were arranged in split split - plot design in complete randomized block with four replicates. Chemical N rates ( 0.0, 30, 45 and 60 kg N / fed. ) treatment were arranged at random in the main plots .Three organic manure treatments (untreated, chicken manure and sheep manure) were distributed at random in the sub-plots, while three biofertilizer treatments (untreated, T26, T16 ) were distributed at random in sub-sub-plots. All flowers parameters significant affected by chemical N rates and biofertilizers. All interactions among the studied factors had significant effect on flower characters. All yield parameters were significantly affected by the chemical N rates in both seasons, where 45 Kg. N / fed. was obtained the highest value of early yield (kg) / plant , while there is no different between 60 kg N / fed. and 45 kg N / fed. on number of fruits ,average weight of fruit (g.) and total yield (ton/fed.) . NO3 and NO2 concentrations were significantly affected by the chemical N rates in both seasons. T26 decreased NO3 and NO2 concentrations. | ||||
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