A field experiment was showed to decide the influence of phosphorus level and transplanting date on quality parameters of onion at Adami Tulu Jedo Kombolcha Woreda, during 2017/18 season. The treatments consisted of four phosphorus levels (0, 20, 40 and 60 kg P ha -1 ) and three transplanting date (42, 49 and 56 days). The experiment was laid out in randomized complete block design with four replications. The result showed that phosphorus level and transplanting date significantly influenced bulb dry matter content, marketable bulb yield, medium size bulb yield. Among these parameters, marketable bulb yield was also significantly influenced by the interaction of phosphorus level and transplanting date. On the other hand, small size bulb yield, large size bulb yield, over size bulb yield and under size bulb yield were only influenced by the effect of phosphorus levels. In this study, fertilized 60 kg P ha -1 with transplanting at 56 days of transplanting date recorded the highest marketable bulb yield, but no significant difference was showed with that obtained at 40 kg P ha -1 with the same transplanting date. Treatment combinations of no P (control) and transplanting date at 42 days produced the lowest amounts of marketable bulb yield. The economic analysis revealed that the highest net benefit with low cost of production was obtained in response to the application of 40 kg P ha -1 and the transplanting age of 56 days. The marginal rate of return for this treatment was 11983% which is found to be economically feasible for producing bulb in the districts.

中文翻译：

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磷和移栽日期对Oromia地区东部Adami Tulu Jedo Kombolcha Woreda灌溉条件下洋葱（洋葱Cepa L.）质量参数和鳞茎产量的影响。

现场试验表明，确定磷含量和移栽日期对2017/18年度Adami Tulu Jedo Kombolcha Woreda洋葱质量参数的影响。处理包括四个磷水平（0、20、40和60 kg P ha -1）和三个移栽日期（42、49和56天）。实验以随机重复的完整模块设计进行，重复四次。结果表明，磷水平和移栽日期显着影响鳞茎干物质含量，适销鳞茎产量，中等大小鳞茎产量。在这些参数中，可销售的鳞茎产量也受到磷水平和移栽日期的相互作用的显着影响。另一方面，小尺寸灯泡产量，大尺寸灯泡产量，尺寸过大的鳞茎产量和尺寸过小的鳞茎产量仅受磷水平的影响。在这项研究中，受精60 kg P ha -1在移栽日期的第56天进行了移植，记录了最高的可销售鳞茎产量，但与在相同移栽日期的40 kg P ha -1获得的鳞茎产量没有显着差异。无磷（对照）和42天移植日期的处理组合产生的可销售鳞茎产量最低。经济分析表明，施用40 kg Pha -1和56天的移栽年龄可带来最高的净收益和较低的生产成本。该处理的边际收益率为11983％，这在该地区生产灯泡的经济上是可行的。在移栽日期的第56天施肥60 kg P ha -1时，可销售的鳞茎产量最高，但与相同移栽日期的40 kg P ha -1时获得的鳞茎产量无显着差异。无磷（对照）和42天移植日期的处理组合产生的可销售鳞茎产量最低。经济分析表明，施用40 kg Pha -1和56天的移栽年龄可带来最高的净收益和较低的生产成本。该处理的边际收益率为11983％，这在该地区生产灯泡的经济上是可行的。在移栽日期的第56天施肥60 kg P ha -1时，可销售的鳞茎产量最高，但与相同移栽日期的40 kg P ha -1时获得的鳞茎产量无显着差异。无磷（对照）和42天移植日期的处理组合产生的可销售鳞茎产量最低。经济分析表明，施用40 kg Pha -1和56天的移栽年龄可带来最高的净收益和较低的生产成本。该处理的边际收益率为11983％，这在该地区生产灯泡的经济上是可行的。但与相同移植日期的40 kg P ha -1所获得的结果无显着差异。无磷（对照）和42天移植日期的处理组合产生的可销售鳞茎产量最低。经济分析表明，施用40 kg Pha -1和56天的移栽年龄可带来最高的净收益和较低的生产成本。该处理的边际收益率为11983％，这在该地区生产灯泡的经济上是可行的。但与相同移植日期的40 kg P ha -1所获得的结果无显着差异。无磷（对照）和42天移植日期的处理组合产生的可销售鳞茎产量最低。经济分析表明，施用40 kg Pha -1和56天的移栽年龄可带来最高的净收益和较低的生产成本。该处理的边际收益率为11983％，这在该地区生产灯泡的经济上是可行的。经济分析表明，施用40 kg Pha -1和56天的移栽年龄可带来最高的净收益和较低的生产成本。该处理的边际回报率为11983％，这在该地区生产灯泡的经济可行性被发现。经济分析表明，施用40 kg Pha -1和56天的移栽年龄可带来最高的净收益和较低的生产成本。该处理的边际收益率为11983％，这在该地区生产灯泡的经济上是可行的。