Ejigu Workineh, G Selassie Yihenew, Elias Eyasu, Damte Matebe
College of Agriculture and Environmental Sciences, Bahir Dar University, Bahir Dar, Ethiopia.
College of Agriculture and Environmental Sciences, Debre Tabor University, Ethiopia.
Heliyon. 2021 Feb 3;7(2):e06074. doi: 10.1016/j.heliyon.2021.e06074. eCollection 2021 Feb.
Soil fertility depletion is emerging as a serious challenge causing low crop yields and food insecurity in Ethiopia. An on-farm experiment was conducted in 2017/2018 cropping season to investigate the effects of combined application of compost and mineral fertilizer on selected soil properties and maize yield in North-western Ethiopia. Treatments were factorial combinations of three rates of Urea/NPSB (0/0, 50/50 and 100/100 kg ha) and three rates of compost (0, 5 and 10 t ha). The field experiment was arranged in randomized complete block design (RCBD) with three replications. Results showed that combined application of compost and mineral fertilizer significantly (p < 0.05) increased soil pH, organic carbon (OC), total nitrogen (TN), available phosphorus (AP), available sulphur (AS) and cation exchange capacity (CEC) compared to sole mineral fertilizer application and the control. On the other hand, there was significant (p < 0.01) decrease in soil bulk density. Plots amended with 10 t ha compost and 100/100 kg ha Urea/NPSB provided the highest maize dry biomass (18.62 t ha) and grain yield (6.07 t ha). Conversely, the lowest biomass (5.70 t ha) and grain (1.17 t ha) yields were obtained from the control. The partial budget analysis also showed that the highest net benefit (32700 Birr ha) was obtained from combined addition of organic and mineral fertilizer which was significantly higher than applying the highest rate of sole mineral fertilizer (27438 Birr ha), highest rate of sole compost (9011.3 Birr ha) and the control (7660 Birr ha). Therefore, we concluded that integrated fertilizer management improves soil properties and crop yield in the highlands of north-western Ethiopia.
土壤肥力耗竭正成为埃塞俄比亚一个严峻的挑战，导致作物产量低下和粮食不安全。2017/2018种植季节在埃塞俄比亚西北部开展了一项田间试验，以研究堆肥与矿物肥料配施对选定土壤性质和玉米产量的影响。处理为三种尿素/氮磷硫硼肥用量（0/0、50/50和100/100千克/公顷）与三种堆肥用量（0、5和10吨/公顷）的析因组合。田间试验采用随机完全区组设计（RCBD），重复三次。结果表明，与单施矿物肥料和对照相比，堆肥与矿物肥料配施显著（p < 0.05）提高了土壤pH值、有机碳（OC）、全氮（TN）、有效磷（AP）、有效硫（AS）和阳离子交换量（CEC）。另一方面，土壤容重显著（p < 0.01）降低。施用10吨/公顷堆肥和100/100千克/公顷尿素/氮磷硫硼肥的小区玉米干生物量最高（18.62吨/公顷），籽粒产量最高（6.07吨/公顷）。相反，对照的生物量（5.70吨/公顷）和籽粒（1.17吨/公顷）产量最低。部分预算分析还表明，有机肥料与矿物肥料配施获得的净收益最高（32700比尔/公顷），显著高于单施最高用量矿物肥料（27438比尔/公顷）、单施最高用量堆肥（9011.3比尔/公顷）和对照（7660比尔/公顷）。因此，我们得出结论，综合肥料管理可改善埃塞俄比亚西北部高地的土壤性质和作物产量。
