Amare Tadele, Bazie Zerfu, Alemu Erkihun, Alemayehu Beamlaku, Tenagne Abere, Kerebh Bitewlgn, Taye Yasin, Awoke Abrham, Feyisa Tesfaye, Kidanu Selamyihun
Adet Agricultural Research Centre, P. O. Box: 08, Bahir Dar, Ethiopia.
Debretabor Research Sub-Centre, Debretabor, Ethiopia.
Heliyon. 2022 Oct 15;8(10):e11111. doi: 10.1016/j.heliyon.2022.e11111. eCollection 2022 Oct.
Ethiopia has a huge potential to increase the production and productivity of potato ( L) mainly in north-western regions where current potato yields are less than 10 t ha. Soil fertility and disease are the major yield-limiting factors of potato in this part of the country. Three-year's on-farm research was conducted to get the optimum economic levels of nitrogen (N) and phosphorus (P) nutrients for the major potato-growing areas of north-western Ethiopia. A factorial experiment with four levels of N (46, 92, 138, and 194 kg ha), three levels of PO (46, 69, and 92 kg ha), and one pilot treatment with no NP nutrient inputs was used. A randomised complete block design with three replications was used. The findings of the research showed that more than 40 t haof potato could be attained (about four times the current productivity) in the study areas through NP nutrient management. The yield was increased significantly with an increased rate of N at all sites ( < 0.01). The yield difference was nonsignificant > 0.05) between P levels for most of the sites and years. The financial analysis of the findings for Yilmana Densa district indicated that applying 138 N and 46 PO kg ha, together, gave a marginal return of (Birr/Birr) 70.9, whereas 138 N and 69 PO kg ha resulted in 10.7. For the South Gondar, 138 N and 46 PO kg ha gave a marginal return of 24.3 (Birr/Birr). Therefore, based on the farm gate price of potato and the cost of fertilizer, 138 N, combined with 69 PO kg ha, is recommended for the Yilmana Densa. For the South Gondar, 138 N, combined with 46 PO kg ha, is recommended.
埃塞俄比亚主要在西北部地区具有大幅提高马铃薯产量和生产率的巨大潜力，该地区目前的马铃薯产量低于10吨/公顷。土壤肥力和病害是该国这一地区马铃薯产量的主要限制因素。开展了为期三年的田间研究，以获取埃塞俄比亚西北部主要马铃薯种植区氮（N）和磷（P）养分的最佳经济施用量。采用了一个析因试验，设置四个氮水平（46、92、138和194千克/公顷）、三个磷水平（46、69和92千克/公顷），以及一个不施氮磷养分投入的对照处理。试验采用随机完全区组设计，重复三次。研究结果表明，通过氮磷养分管理，研究区域的马铃薯产量可达到40吨/公顷以上（约为当前生产率的四倍）。在所有试验地点，随着施氮量增加，产量显著提高（P<0.01）。在大多数试验地点和年份，不同磷水平之间的产量差异不显著（P>0.05）。对伊尔马纳·登萨区研究结果的财务分析表明，每公顷施用138千克氮和46千克磷，边际回报率为70.9（比尔/比尔），而每公顷施用138千克氮和69千克磷，边际回报率为10.7。对于南贡德尔，每公顷施用138千克氮和46千克磷，边际回报率为24.3（比尔/比尔）。因此，根据马铃薯的农场交货价格和肥料成本，建议伊尔马纳·登萨区每公顷施用138千克氮和69千克磷。对于南贡德尔，建议每公顷施用138千克氮和46千克磷。
