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Objective: To determine the Irrigation Uniformity Coefficient (CUR) in the "Praxedis Guerrero" forest nursery, managed by the Secretariat of Natural Resources and Environment of the Government of the State of Durango, and, based on the results, propose system adjustments to enhance irrigation efficiency.
Methodology: To evaluate the CUR across the six production structures, the procedure outlined in the Mexican standard NMX-AA-170-SCFI-2016 was followed. In each of the four greenhouses and two shade houses, one sector comprising one of the four quadrants within each structure was randomly selected. A grid was drawn within each selected sector, and a total of 60 collection containers were placed at each intersection point. The irrigation system was operated for 30 minutes, after which the volume of water collected in each container was measured. The CUR formula was applied accordingly. The structure with the lowest coefficient underwent corrective interventions, including emitter homogenization, cleaning of filters and pipes, followed by a re-evaluation to assess the impact of the adjustments.
Results: The average CUR values across the production structures exhibited statistically significant differences (p ≤ 0.05), ranging from a minimum of 50.9% to a maximum of 86.0%. In the greenhouse with the lowest CUR, system adjustments led to an improvement of 17.0%; however, this value still fell short of the minimum 80% threshold established by the reference standard. Moreover, the distribution grid of the 60 containers revealed unequal water distribution among plants within the same sector. Conclusions: The irrigation systems in and among the six production structures lacked uniformity. Only structure IN2 achieved an acceptable CUR. The corrective actions implemented had a direct and positive impact on the uniformity coefficient, which was reflected in a more even spatial distribution of irrigation water.