Resumo

DELGADO-PACHECO, Verónica et al. Different colors of plastic mulch in the modification of the microclimate, yield and quality of onion. Rev. Mex. Cienc. Agríc [online]. 2025, vol.16, n.6, e3793.  Epub 13-Set-2025. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v16i6.3793.

In Sinaloa, one of the causes of the low yield of onion (Allium cepa L.) is that the minimum temperatures do not drop enough to stimulate bulb development. In view of this, looking for an alternative to reduce the temperature in the field, the influence of plastic mulch on the modification of the microclimate and on the quality and yield of this vegetable was evaluated. To this end, during the autumn-winter 2021-2022 cycle, an experiment was conducted under a randomized complete block design with four treatments and four replications. Three colors of plastic mulch were evaluated: black, gray/black, white/black, and the unmulched control. The response variables were soil temperature and moisture, plant development, including weight, bulb diameter, plant height, number of leaves, degrees Brix, and firmness. It was found that the lowest soil temperatures and the highest moisture retention occurred in the white/black plastic mulch, and it was also where the highest weight, bulb diameter, and yield were obtained. Considering the modifications to the microclimate, it was concluded that using white/black plastic mulch is suitable for the conditions of the autumn-winter cycle of the semi-arid and warm climate of the agricultural areas of Sinaloa.

Palavras-chave : Allium cepa; soil moisture; soil temperature.

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