Abstract

FURCAL-BERIGUETE, Parménides  and  BARQUERO-BADILLA, Alejandro. Respuesta del plátano a la fertilización con P, K y S durante el primer ciclo productivo. Agron. Mesoam [online]. 2013, vol.24, n.2, pp.317-327. ISSN 2215-3608.

Response of plantain to fertilization with P, K and S during the first productive cycle. The objective of this work was to evaluate the growth and yield response of the first reproductive cycle of plantain (Musa AAB) to the application of phosphorus, potassium and sulfur. The study was established in La Fortuna, San Carlos, Costa Rica. The soil where the experiments were established is an Inceptisol, formed by volcanic materials, with medium fertility and clayloam texture. Doses of 0, 125, 250, 375 kg/ha of K₂O, 0 and 70 kg/ha of P₂O₅ were applied in trial 1, while in trial 2 were applied the same levels of K₂O were used, in addition to 0 and 30 kg/ha of sulfur (S). The sowing was made in April and May of 2008 and 2009, respectively, with corms of the cultivar Curraré “Semi Giant”, with a density of 2.380 and 2.223 plants per hectare, in each year. There was no statistical response to K₂O doses in the first harvest, but differences were obtained in the second trial (2010) for the variables pseudostem girth and height at four and seven months in experiment 2, and bunch weight, length and thickness of the middle finger of the second hand. For these three variables, with 375 kg of K₂O, the values were: 13.17 kg, 28.81 cm and 62.62 inch treintaidosavo respectively. There was only response to the use of P₂O₅ in height and girth at four months (1.32 m 0.39 m), not so for S. The total absorption of K, P and S at the time of harvest was 237.73, 10.83 and 7.44 kg/ ha, respectively.

Keywords : Musa AAB nutrition; pseudostem height; absorption of K, P and S; cultivar Curraré.

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