摘要：Two field experiments were completed in private farm, Al Mahalla Al Kobra, Gharbiya Governorate, Egypt through the two winter seasons of 2016/2017 and 2017/2018 to find out the best way to cultivate under various levels of nitrogen fertilizer (60, 90 and 120 kg N ha~(-1)) in addition to phosphate fertilizing alone or mixed with potassium fertilization. It can be concluded that there are significant differences between planting in wide furrows and ridges in the two growing seasons. The data reveal that, planting in wide furrows method resulted in the highest total, marketable and culls bulbs yield hectare~(-1) and average bulb weight as well as, bulb diameter in 2016/2017 and 2017/2018 seasons comparing with planting in ridges. The lowest total weight loss percentage and highest remainder percentage in bulbs were always belonged to planting in furrows method system and the opposite was true for planting in ridges method. During the two seasons, the highest total and marketable bulbs yield hectare~(-1) and average weight of the bulb were recoded at the highest nitrogen level (120 kg N ha~(-1)) with the highest estimations of the total weight loss ratio and lowest remainder percentage in bulbs. While culls bulbs yield fed~(-1) was increased by decreasing nitrogen level (60 kg N ha~(-1)). Maximum values of total crop productivity and its components were found in plots received phosphorus combined with potassium fertilization with the best quality of storability over six months. Finally, it can be inferred from the obtained results and from the economic point of view that transplanting onion plants with wide furrows planting method under the highest level of nitrogen fertilizers (120 kg N ha~(-1)) and fertilization with both phosphorus and potassium together could be recommended to achieve the highest economic yield and storability under the conditions of North Delta area.
关键词：Onion plant;Allium cepa L.;planting method;mineral fertilizer;bulbs yield and storability
