Avaliação do condicionamento fisiológico e aplicação de fósforo em sementes de milheto / Physiological conditioning and phosphorous application on pearl millet seeds

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

17/11/2011

RESUMO

Beside the many aptitudes of the pearl millet (stock feeding, hay, soil layer protection and food in general), some factors limit its expansion in Brazil, being generally, the low physical and physiological seed quality on the market as one of the harshest problems. Thus, this study aimed at applying physiologic conditioning techniques, pelleting and phosphorus application on seeds to improve seedling emergence and crop development in the fields. The experiment used 3 seed lots of BRS 1501 cv, with water and osmotic solution conditioning, while pelleting was tested with 4 different binders (PVA, PVP k30, bentonite and Methil celulose) and different inert and phosphorate powder products. The evaluations consisted of initial phisical tests, followed by physiological tests for 6 months of storage, Field development under 2 different phosphorus soil content and, chemical evaluations as total P content and acid phosphate on pearl millet seedlings and plants. The results show no significant difference on the seedling emergence and germination of physiological conditioned seeds. The seed pelleting was effective on improving seeds volume without harming seed physiologic performance. Regarding phosphorous incorporation through seed pellet, the results show significant effects on the seedling development, as well as it´s absorption. However, with significant impact of specific materials and quantities on the seeds physiologic performance, especially with Bicalcic phosphate.

ASSUNTO(S)

milheto pearl millet peletização pelleting seed-physiology sementes - fisiologia fósforo macronutrient macronutrientes phosphorus

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