Abstract

BELTRAN, Marcelo et al. Rendimiento del maíz ante el agregado de zeolita y yeso a la fertilización nitrogenada en un Argiudol típico de San Antonio de Areco. RIA. Rev. investig. agropecu. [online]. 2021, vol.47, n.1, pp.53-60.  Epub Apr 14, 2021. ISSN 1669-2314.

The objectives of the present work were to evaluate the effects of the application of gypsum and zeolites accompanying the nitrogen fertilization over the grain yield of corn as well as to estimate the costs in relation to the benefit of the treatments. During the 2017/18, campaign 18 plots were established in a typical Argiudol soil of San Antonio de Areco, Buenos Aires. As base fertilization, there was applied 100 kg ha-1 of mono ammonium phosphate (MAP) as fertilizer to all the plots at sowing. Treatments were: (1) 200 kg ha-1 of urea (U); (2) 200 kg ha-1 of urea with 90 kg ha-1 of gypsum (U+Y); 150 kg ha-1 of urea with 50 kg ha-1 of granulated zeolite (U+Z); 150 kg ha-1 of urea, 90 kg ha-1 of gypsum and 50 kg ha-1 of granulated zeolite (U+Y+Z) and a control treatment with none nitrogen fertilization. (T). At the U+Z and U+Z+Y treatment, 25% of the urea rate was replaced with zeolites. Fertilization with U and U+Y rose grain yield by 18 and 16%, respectively, over the control treatment, l, whereas urea was applied together with gypsum and zeolites (i.e. U+Y+Z) yield increase reached about 25% (p <0,05). There was not detected difference in terms of grain yield between U + Z treatment and control or the treatment fertilized with urea alone. Based on the experimental results, replacement of 25% of urea with zeolite, alone or in combination with gypsum represents an interesting alternative to reduce costs without affecting corn yields. Nevertheless, more experiments are need, in order to prove it in different situation.

Keywords : Zea mays L; no-tillage; agrominerals; cost/benefit.

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