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Scientia Agricola

versão On-line ISSN 1678-992X

Resumo

SPINOLA, Maria Cristina Mingues  e  CICERO, Silvio Moure. Physical and physiological qualities of peanut seed from plants cultivated with phosphogypsum source: I. Limed area. Sci. agric. [online]. 2000, vol.57, n.1, pp.113-119. ISSN 1678-992X.  http://dx.doi.org/10.1590/S0103-90162000000100019.

This work was carried out with peanut seeds, cv.’Tatu‘(Arachis hypogaea L.), in a randomized block design with three replications. The treatments were of phosphogypsum rates (0, 400, 800, 1200 kg/ha), application times at (sowing or flowering) and application methods (total area or in bands) in a limed area (base saturation up to 70%). Fertilization at sowing consisted of Phosphorus (80 kg/ha of P2O5) and Potassium (30 kg/ha of K2O5). Seed quality was evaluatted by weigth of 100 seeds, germination test, vigor tests (first germination counting, accelerated aging, eletric conductivity, and field seedling emergence) and evaluation of macronutrient levels in seeds. Phosphogypsum in a limed area, independently of rate, application time and application method, did not affect seed quality. The phosphogypsum application at sowing presented a higher nitrogen seed level in as compared to application at flowering. The sulphur presence in phosphogypsum influenced the potassium level in seeds.

Palavras-chave : phosphogypsum; limed; calcium; physiologic quality; vigor.

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