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PHYSICAL AND PHYSIOLOGICAL QUALITY OF CORN SEEDS RELATED TO ORGANIC AND MINERAL FERTILIZATION

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Author(s): HIGINO MARCOS LOPES | JOÃO CARLOS CARDOSO GALVÃO | ANDRÉIA MÁRCIA SANTOS DE SOUZA DAVID | ANGELA ALVES DE ALMEIDA | EDUARDO FONTES ARAÚJO | LUIZ BEJA MOREIRA | GLAUCO VIEIRA MIRANDA

Journal: Revista Brasileira de Milho e Sorgo
ISSN 1676-689X

Volume: 3;
Issue: 2;
Start page: 265;
Date: 2004;
Original page

Keywords: organic culture | seeds quality | Zea mays.

ABSTRACT
The objective of this research was to evaluate the quality of BRS “Sol da Manhã” seeds (Zea mays L.) which were cultivated under different organic and mineral fertilizing rates, combined or not. The research consisted on the following treatments per ha: 1. neither organic nor mineral fertilizing; 2. 250 kg of 4-14-8 + 100 kg of ammonium sulfate; 3. 500 kg de 4-14-8 + 200 kg of ammonium sulfate; 4. 40 m3 of organic compost; 5. 40m3 of organic compost + 250 kg of 4-14-8 + 100 kg of ammonium sulfate; 6. 40 m3 of organic compost + 500 kg of 4-14-8 + 200 kg of ammonium sulfate. Seeds samples from each treatment were submitted to physical and physiological evaluations, by the following tests: classification and size distribution, moisture content, weight of 1000 seeds, germination test, cold test and electrical conductivity. It was used a completely randomized design with four replications. From the total seeds weight, an average of 87,3% was retained at 20 and 22/64” sieves. The application of 40 m3 organic compost + 500 kg of 4-14-8 + 200 kg of ammonium sulfate/ha allows production of bigger and heavier seeds related to other treatments. The treatments do not affect germination seeds at first count. The isolated use of organic compost results in seeds with high germination, and so does the use of mineral fertilizing.
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