Chemical properties of an oxisol under organic management as influenced by application of sugarcane bagasse ash
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Data
2012-06
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Resumo
There are large areas of Oxisols in South America, including Brazil, with low fertility and acidity. To improve crop
yields on these Oxisols, liming and fertilization is an essential practice. However, besides the high cost of fertilizers, chemical
fertilizers cannot be used in organic production systems, except insoluble sources. Ash is one of the alternative source of supplying
macro and micronutrients. A field experiment was conducted, in a completely randomized block design in a factorial arrangement
(three sources of ash x four rates) resulting on 12 treatments, to evaluate the effect of source and rate of ash application on soil
chemical properties. The treatments consisted of three sources (bagasse, bagasse+PJ07-A and bagasse+PJ07-RA) of sugarcane ash
applied in four rates as 0; 5; 15 and 30 Mg ha -1 . Results showed that the use of ash significantly improved soil chemical properties
such as pH, P, K, Mg, base saturation, K and Mg saturation and significantly reduced soil acidity (H+Al). Depending on the ash
source or rate, some of the soil chemical properties were affected, however, the effect of ash source was not so pronounced as
compared with ash rate. Ashes application resulted on a soil nutritional condiction enough to guarantee the growth and yield of
most annual crops. Ash sources were equally effective in reducing acidity and improving soil fertility under this study condition,
while increasing ash rate provides decrease in H+Al content and increase in pH, Mg, P and K.
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Palavras-chave
Base saturation, Alternative fertilizer, Organic residue, Saturação de bases, Resíduos orgânicos, Fertilizante alternativo
Citação
FERREIRA, Enderson Petrônio de Brito; FAGERIA, Nand Kumar; DIDONET, Agostinho Dirceu. Chemical properties of an oxisol under organic management as influenced by application of sugarcane bagasse ash. Revista Ciência Agronômica, Fortaleza, v. 43, n. 2, p. 228-236, Apr./June 2012.