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O recobrimento de sementes possui potencial para tornar-se um fator de impacto no setor sementeiro, já que possibilita aderir uma vasta gama de materiais às sementes. Esta pesquisa teve como objetivo avaliar fontes e doses de fósforo aderidas às sementes de soja e recobertas por uma camada protetora de polímero. Foram usadas 4 doses de Fitina e de Fosfato bicálcico, sendo elas: 0,0; 0,7; 1,4 e 2,1 g/100g de semente. Os tratamentos foram avaliados em dois tipos de solo nos quais as plantas se desenvolveram: alta e baixa disponibilidade de fósforo, partindo-se de um solo com disponibilidade inicial de P de 10,5 mg dm-3, na qual em um solo houve correção de fertilidade com 60 kg ha-1 de super fosfato triplo, e em outro não, respectivamente. O polímero utilizado para o recobrimento foi aplicado na dose de 0,8 mL/100g de sementes. O delineamento experimental foi em blocos casualizados com 3 repetições, sendo as unidades experimentais dispostas em vasos com capacidade para 12 L, utilizando-se 3 plantas por vaso. Os parâmetros avaliados foram: número de sementes por planta, massa de sementes por planta e peso de mil sementes. O recobrimento de sementes de soja com fósforo aumenta a produtividade, dependendo das fontes e doses de fósforo usadas. A dose de 21 gramas de Fitina por 1 kilo de sementes aumenta a produtividade da cultura da soja em mais de 14%. Seed coating has potential to become a strong factor in the seed sector. It allows farmers to add a vast variety of materials to the seed. This project had the objective of studying the effects of sources and doses of phosphorous added to the soybean seed by coating. It involved four doses of phytic acid and bicalcic phosphate, which were: 0.0; 0.7; 1.4 and 2.1g/100g seeds. The treatments were evaluated in two types of soil: high and low phosphorous availability, obtained from a soil with initial P content of 10.5 mg dm-3, in which in one type of soil 60kg ha-1 of super triple phosphate was applied while nothing was applied to correct the P content in the other soil. The polymer used in seed coating was applied at 0.8 ml/100g of seeds. A randomized complete block design was used with three replications. It was used vases with 12 L of capacity with three plants per experimental units. The following parameters were evaluated: number of seeds per plants, weight of seeds per plants and the weight of a thousand seeds.. It was concluded that seed coating of soybeans seeds with phosphorous increased productivity according to doses and phosphorous sources. The dosage of 21 grams of phytic acid per 1 kilo of seeds increased the yield by more than 14%

Produtividade de plantas de soja provenientes de sementes tratadas com fósforo