Resumo

CASTELLANOS, César I. S. et al. Application to soil of rice husk ash as silicon source: effect in wheat seeds quality produced under salt stress. Rev. de Ciências Agrárias [online]. 2016, vol.39, n.1, pp.95-104. ISSN 0871-018X.  https://doi.org/10.19084/RCA15011.

Wheat grain represents about 30% of world cereal production and in Brazil it occupied the fifth largest area sown in 2012/2013. Crops productivity can be limited by the effect of salinity in about 50% of the irrigated land used in the agriculture. Silicon may confer plant tolerance to salts, becoming a management alternative against this stress. The experiment was carried in buckets in a greenhouse, a 3x4 factorial design was used with four replicates in a completely randomized design, being the first factor the saline stress, caused by irrigation with water enriched with sodium chloride (NaCl), in doses of 0 (control); 8 and 16 mM, and the second factor, the fertilization with SiO₂, at doses of 0 (control); 1000; 2000 and 3000 kg ha^-1, using rice husk ash as SiO₂ source. SiO₂ doses of up to 2000 kg ha^-1 led to an increase of the number of ears and seed weight per plant. The application of rice husk ash increased the weight of thousand seeds and did not affect the germination of the seeds obtained, neither the seedlings dry weight.

Palavras-chave : physiological quality; rice husk; silicon; Triticum aestivum L.

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