A field study was conducted to evaluate existing irrigation management practices in small-scale farm holdings in northwest Ethiopia. In this study, the effect of furrow length, as well as flow rate on irrigation performance, crop yield, and water usewas studied. The field experiment was arranged in a split plot design; furrow length as main plot and flow rate as sub-plot. Each treatment has three levels; 10, 25, and 40 m furrow lengths and 0.4, 0.6, and 0.8 L/s flow rates. Irrigation performance indicators are: application efficiency, Ea, storage efficiency, Es, distribution uniformity, DU, runoff fraction, Rf, deep percolation fraction, Df, yield, Y, water use efficiency, WUE. The effect of furrow length was statistically significant (p<0.05) on all performance indices except E_s and flow rate has shown significant effect on all performance indices (p<0.05). The ranges of measured values of E_a, E_s, DU, R_f, and D_f were 18-34%; 46-80%; 93-98%; 81-95%; 11-57%; and 25-47% respectively. Both furrow length and flow rate had a significant effect on yield and WUE at p<0.05. The ranges of crop yield and WUE found in the study were 17-32 t/ha and 2.1-4.1 Kg/m~3 respectively. Crop yield and WUE have shown a decreasing trend as furrow length increases and increases as flow rate increases.
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机译：进行了实地研究，以评估埃塞俄比亚西北部小型农场中现有的灌溉管理做法。在这项研究中，研究了沟长，流速对灌溉性能，作物产量和用水的影响。现场实验采用分块图设计。犁沟长度作为主图，流速作为子图。每种处理都有三个级别;沟长为10、25和40 m，流速为0.4、0.6和0.8 L / s。灌溉性能指标为：施用效率，Ea，存储效率，Es，分布均匀度，DU，径流分数，Rf，深层渗滤分数，Df，产量，Y，水分利用效率，WUE。犁沟长度对除E_s以外的所有性能指标均具有统计学意义（p <0.05），流速对所有性能指标均具有显着影响（p <0.05）。 E_a，E_s，DU，R_f和D_f的测量值范围为18-34％; 46-80％; 93-98％; 81-95％; 11-57％;和25-47％。犁沟长度和流速都对产量和WUE有显着影响，p <0.05。研究中发现的作物产量和WUE范围分别为17-32 t / ha和2.1-4.1 Kg / m〜3。作物产量和水分利用效率显示出随着沟长的增加而下降的趋势，并随着流速的增加而增加。
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