This work aimed at verifying the usefulness of the use of biofertilizer in the fertigation through a micro-sprinkler irrigation system. This work was performed in the experimental field of Embrapa Cassava and Fruit growing, in Cruz das Almas, Bahia, Brazil, with the duration of 380 days. The experimental design was in randomized blocks with three repetitions, in a scheme of sub-subdivided plots. The plots consisted on the number of days after the beginning of the application of treatments; the subplots consisted on the different outflows of the emitters which were 30, 40, 50, and 70 L h⁻¹; and the sub-subplots were the concentrations of 50 and 75% of the biofertilizer. The assessed variables were: relative outflow, clogging degree and water distribution uniformity coefficient of the emitters. The analysis of variance showed interaction between the different outflow of the emitters and the concentrations of biofertilizer for all the variables. The emitters’ water distribution uniformity coefficient decreased with the time, with a greater decrease for the emitters with outflow of 30 L h⁻¹. The different biofertilizer concentrations did not influence the relative outflow for the micro-sprinkler with outflow of 30 L h⁻¹. The micro-sprinklers presented, at the end of the assessment period, a clogging degree of moderate severity. The micro-sprinkler with outflow of 70 L h⁻¹, with diameter of 1.2 mm, was the most adequate for the application of the biofertilizer with suspended solids content equal to 14.8 g L⁻¹.

这项工作旨在通过微喷灌系统验证在灌溉施肥中使用生物肥料的有效性。这项工作是在巴西巴伊亚州克鲁兹达斯阿尔马斯的 Embrapa 木薯和水果种植试验田进行的，持续时间为 380 天。实验设计是在随机区组中重复三次，在一个细分的地块方案中。地块包括开始施用处理后的天数；子图由排放器的不同流出量组成，分别为 30、40、50 和 70 L h ^-1; 子图是 50% 和 75% 的生物肥料浓度。评估变量为：相对出水量、堵塞程度和配水均匀系数。方差分析显示了排放物的不同流出量与所有变量的生物肥料浓度之间的相互作用。灌水器的配水均匀系数随时间的推移而下降，出水量为30 L h ^-1的灌水器下降幅度更大。不同生物肥料浓度不影响流出量为30 L h ^-1的微喷头的相对流出量。在评估期结束时，微喷头呈现中等严重程度的堵塞。出水量 70 L·h 的微喷头^-1直径为1.2 mm，最适合应用悬浮固体含量为14.8 g L ^-1的生物肥料。