Silicon Contribution Via Nutrient Solution in Forage Plants to Mitigate Nitrogen, Potassium, Calcium, Magnesium, and Sul
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ORIGINAL PAPER
Silicon Contribution Via Nutrient Solution in Forage Plants to Mitigate Nitrogen, Potassium, Calcium, Magnesium, and Sulfur Deficiency Antonio Carlos Buchelt 1 & Gelza Carliane Marques Teixeira 1 & Kamilla Silva Oliveira 1 & Antônio Márcio Souza Rocha 1 & Renato de Mello Prado 1 & Gustavo Caione 2 Received: 26 November 2019 / Accepted: 31 March 2020 # Sociedad Chilena de la Ciencia del Suelo 2020
Abstract This study aimed to evaluate whether silicon application in the nutrient solution is efficient in relieving stress caused by nutrient deficiency (N, K, Ca, Mg, and S) in the forages BRS Zuri (Panicum maximum) and BRS RB331 Ipyporã (Brachiaria ruziziensis × Brachiaria brizantha). Two experiments were carried out in a greenhouse with both forages, with plants grown in a nutrient solution in pots filled with washed sand. Treatments were arranged in a completely randomized block design, with five replications and consisted of complete solution (control) and individual omission of nitrogen, potassium, calcium, magnesium, and sulfur in the absence (−Si) and presence of silicon (+Si) at a concentration of 2 mmol L−1 applied via nutrient solution as stabilized potassium sodium silicate. The dry mass of the shoot, root, and clump residual material, accumulation and use efficiency of nutrients, and the description of symptoms of nutritional deficiency were evaluated. Silicon addition in the nutrient solution favored shoot dry matter production and root dry matter production of both forages, in treatments with K, Ca, and Mg omission; the same effect was not observed for N and S. We conclude that the application of silicon attenuates the effects of potassium, calcium, and magnesium deficiency in forages BRS Zuri and BRS RB331 Ipyporã, as it increases the accumulated shoot dry mass, due to the greater efficiency in the use of these nutrients. The beneficial effect of silicon was not important in forage plants with nitrogen and sulfur deficiency. Keywords Pasture . Sodium silicate . Potassium silicate . Nutritional deficient plants
1 Introduction Cultivation of grasses of the genera Panicum and Brachiaria has stood out in livestock for their ability to adapt to various environmental and management conditions (Monteiro et al. 1995) due to the high production capacity of good quality leaf dry matter (Kissmann 1997) if nutrient availability is adequate. Problems of nutritional deficiency of forage cultivations in tropical regions, especially macronutrients, occur with high * Antonio Carlos Buchelt [email protected] 1
Department of Soils and Fertilizers, School of Agricultural and Veterinarian Sciences, São Paulo State University “Júlio de Mesquita Filho”(UNESP), Jaboticabal, São Paulo, Brazil
2
Department of Agronomy, Mato Grosso State University (UNEMAT), Alta Floresta, Mato Grosso, Brazil
frequency due to the low soil fertility (Prado et al. 2011) and restricted use of fertilizers, harming plant growth. Silicon is used to reduce different stresses in plants such as water deficit (Camargo et al. 201
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