Resumo

CHERREPANO MANRIQUE, Reynado Francisco; VELEZ CHANG, Yasmin Jesús; CRUZ NIETO, Dante Daniel  e  LEGUA CARDENAS, José Antonio. Stomatal density of pea (Pisum sativum) by scanning electron microscopy in relation to yield. Rev. Inv. Cs. Agro. y Vet. [online]. 2021, vol.5, n.15, pp.114-125. ISSN 2664-0902.  https://doi.org/10.33996/revistaalfa.v5i15.132.

The objective was to determine the stomatal density, by electron microscopy, of pea leaves grown at different doses of nitrogen and distances between plants, to obtain higher yields. Therefore, the experimental area was installed using the Completely Random Block Design, with six treatments consisting of F1 = 00 - 70 - 70, F2 = 80 - 70 - 70 and F3 120 - 70 - 70 kg / ha and D1 = 1.5m * 0.25 m and D2 = 1.5 m * 0.35m, obtaining the treatments: T1 = F1 * D1, T2 = F1 * D2, T3 = F2 * D1, T4 = F2 * D2, T5 = F3 * D1 and T6 = F3 * D2, these doses were applied at 17 and 62 days after sowing. Then it was evaluated from sowing to harvest and the data were processed by analysis of variance and Duncan, the nitrogen concentration and stomatal density were also analyzed by treatment. The results determined that T5 excelled in plant length with 129.3 cm, commercial yield with 13.25 tn / ha and T4 in weight of pods per plant with 633.4 g and number of pods per plant with 51. In foliar analysis, T6 with 6.69% of nitrogen and stomatal density in T5 with 98 stomata / mm2. It is concluded that the higher the nitrogen dose and the lower the spacing, which is T5 with 98 stomata / mm2 and a concentration of 5.83 g of nitrogen / 100 g of dry matter, influenced the yield

Palavras-chave : Nitrogen; Planting density Stomatal density; Pea; Yield.

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