Achieving food and nutritional security is a major challenge in Ethiopia, especially with increasing human population and low crop productivity. Legumes offer an alternative choice to chemical fertilizers for increasing crop yields. The aim of this study was to assess, under glasshouse conditions, plant growth and symbiotic performance of uninoculated soybean genotypes planted in soils collected from different locations in Ethiopia. The results showed significant differences in plant growth and symbiotic performance among the soybean genotypes planted in different soils. There was a location-specific effect of soil on plant growth and symbiotic N nutrition of soybean. Whole-plant biomass was highest in soil from Amaro, followed by Boricha, Dorebafano, Pawe, and Mambuk. The δ¹⁵N values ranged from +0.82‰ for Pawe to +5.11‰ at Dorebafano. However, %Ndfa of soybean was greater in plants grown in Mambuk soil, followed by Pawe with the lowest %Ndfa being in Amaro soil. The amount of N-fixed followed similar pattern as %Ndfa. The significant interaction found between soil type and soybean genotype for plant DM, shoot N concentration, δ¹⁵N, %Ndfa, N-fixed and soil N-uptake clearly indicated the effect of soil factors. This study revealed the presence of native rhizobia in Ethiopian soils that are compatible with soybean. The N contribution of the soybean genotypes was variable, and strongly influenced by the soil factors.

中文翻译：

---

对从埃塞俄比亚不同地点采集的未接种土壤中生长的大豆基因型植物的生长和氮固定的评估。

实现粮食和营养安全是埃塞俄比亚的一项重大挑战，特别是随着人口的增加和农作物生产力的下降。豆类为化学肥料提供了另一种选择，以增加农作物的产量。这项研究的目的是在温室条件下评估从埃塞俄比亚不同地区收集的土壤中种植的未接种大豆基因型的植物生长和共生性能。结果表明，在不同土壤条件下种植的大豆基因型在植物生长和共生性能上存在显着差异。土壤对大豆的植物生长和共生氮营养有特定的位置影响。来自Amaro的土壤中全植物生物量最高，其次是Boricha，Dorebafano，Pawe和Mambuk。该δ ¹⁵N值的范围从Pawe的+ 0.82‰到Dorebafano的+ 5.11‰。然而，在Mambuk土壤中生长的植物中大豆的％Ndfa更高，其次是Pawe，而在Amaro土壤中％Ndfa最低。固氮量遵循与％Ndfa类似的模式。的显著相互作用土壤类型和植物DM，拍摄N浓度大豆基因型之间发现，δ ¹⁵ N，％NDFA，N固定和土壤清楚地吸氮量指示的土壤因素的影响。这项研究揭示了在与大豆相容的埃塞俄比亚土壤中存在天然根瘤菌。大豆基因型的氮贡献是可变的，并且受到土壤因素的强烈影响。