Resumo

CRUZ CRESPO, Elia et al. Extraction of N-P-K in Coriandrum sativum ‘Pakistan’ in hydroponics. Rev. Mex. Cienc. Agríc [online]. 2017, vol.8, n.2, pp.355-367. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v8i2.56.

Given the limited information on nutritional requirements for coriander cultivation, is proposed to evaluate the concentration and extraction of N, P and K under different osmotic potentials of the nutrient solution during growth until flowering. Therefore, the Pakistan variety was established in bags with red tezontle, under greenhouse conditions on October 20, 2013. The plants were watered with nutrient solution of Steiner with osmotic potential of 0.018, 0.036, 0.054 and 0.072 Mpa. The experimental design was completely randomized with 30 replicates for growth variables and five replicates for nutritional determination. The experimental unit was a bag with three plants at the time of transplantation. The plant height, fresh matter weight, dry matter weight, SPAD readings, concentration and N, P and K extraction were determined. The analysis of variance and mean comparison test were performed. Subsequently, by means of regression, the nutrient accumulation models were estimated. It was determined that to reach the commercial height of 30 cm and the best yield of fresh and dry matter, we must use the nutrient solution of Steiner with the osmotic potential of 0.054 MPa from the transplant to 30 ddt. While the nutritional extraction index was 5.38, 4.74 and 0.69 kg t-1 of K, N and P, respectively. If the interest is to reach the flowering stage (70 ddt) use the same solution.

Palavras-chave : absorption; coriander; nitrogen; phosphorus potassium.

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