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Revista Cubana de Química

versão On-line ISSN 2224-5421

Resumo

VANDA-SEBASTIAO, Joana S; FERRER-CASTILLO, Alfredo; DA COSTA-QUIZEMBE, João  e  DE CARVALHO-ZACARIAS, Edivandro Flávio. Application of crescent doses of calcary by incubation in soils of chianga-huambo, Angola. Rev Cub Quim [online]. 2019, vol.31, n.2, pp.258-282. ISSN 2224-5421.

In this work the limestone doses are estimated to correct the soil of an area of the Chianga-Huambo experimental station and aimed at obtaining ideal doses of limestone to raise the pH to a value that makes the nutrients more available to the plants, to standardize other methods of correction. Soil samples were collected from the surface to a depth of 20 cm from the experimental station. With the application of increasing doses of limestone to soil, the pH reached values of 5,79 and 5,44 in H2O and CaCl2, respectively. The experimental design was entirely random, and three evaluation periods, 30, 60 and 90 days after application in the soil. The Al 3+ ion reduced to the value of 0,2 cmol / l, whereas, the effective cation exchange capacity, sum of bases increased due to the presence of the exchange cations in the limestone.

Palavras-chave : soil pH; incubation with limestone; soil chemistry.

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