Métodos de análise quantitativa inorgânica em caldo de cana de açúcar; vinhaça e melaço: I. determinação de cálcio, magnésio, potássio, enxofre e fósforo em um mesmo extrato

Glória, N. A. da; Rodella, Arnaldo Antonio

doi:10.1590/s0071-12761972000100001

Cited by 4 publications

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References 6 publications

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“…), descrito por Goedert et al (1986). As análises tecnológicas, isso é, P 2 O 5 no caldo, Pol do caldo e ATR, foram feitas na cana planta, pelos métodos descritos por Copersucar (1978) e Glória & Rodella (1972).…”

Section: Methodsunclassified

Fontes de fósforo (fluida ou sólida) na produtividade agrícola e industrial da cana-de-açúcar

Korndörfer

Melo

2009

Ciênc. agrotec.

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RESUMOO estudo foi realizado em condições de campo, conduzido durante aproximadamente três anos, junto a Usina São Luiz Açúcar e Álcool, situada em Pirassununga (SP), utilizando-se a cultivar de cana-de-açúcar SP71-1406. Objetivou-se avaliar o desempenho de adubos fosfatados aplicados ao solo no plantio da cana planta, nas formas fluida e sólida, e seus efeitos ao longo do tempo, sobre a produtividade e qualidade da cana-de-açúcar. As fontes de fósforo testadas foram o superfosfato triplo, superfosfato simples, ácido fosfórico e uma mistura de ácido fosfórico + fosfato natural, na dose de 100 kg ha -1 de P 2 O 5 . As duas primeiras foram aplicadas na forma granulada e as duas últimas na forma fluida, em linha e no fundo do suco. Os resultados permitiram concluir que não houve diferença estatística entre a adubação fosfatada sólida e fluida na produtividade agrícola e industrial da cana planta, e após o terceiro corte. o Índice de Eficiência Agronômica dos fosfatos apresentou-se na seguinte ordem: superfosfato simples (110%) > superfosfato triplo (100%) > ácido fosfórico (73%) > ácido fosfórico + fosfato natural (48%).Termos para indexação: Adubos fluidos, fosfato, ácido fosfórico, cana-de-açúcar. ABSTRACTWith the increased use of liquid fertilizers in sugarcane farming, having deeper knowledge about agronomic effects of some of the fertilizer products becomes a necessity. The study was carried out under field conditions using the cultivar SP71-1406. The experiment was driven during approximately three years, and was located at São Luiz SA sugar-mill, Pirassununga (SP). The objective of this study was to evaluate the agronomic effect of different phosphate fertilizers on plant cane using liquid and solid forms. Residual effect, sugarcane yield and quality of the raw material were some of the factors studied. The phosphorus sources tested were triple superphosphate, single superphosphate, phosphoric acid and a mixture of phosphoric acid + rock phosphate. They were used in the rates of 100 kg ha -1 of P 2 O 5 . The first two fertilizers (superphosphates) were applied in the granulated form and the last ones in the liquid form. The phosphorus fertilizers were applied on the furrow just before planting. The results allowed concluding that there was no difference between solid and liquid form in the agricultural and industrial productivity. After the third cut, the Agronomic Efficiency Index showed that phosphates source reduced in the following order: single superphosphate (110%) > triple superphosphate (100%) > phosphoric acid (73%) > phosphoric acid + rock phosphate (48%).

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Section: Methodsunclassified

Fontes de fósforo (fluida ou sólida) na produtividade agrícola e industrial da cana-de-açúcar

Korndörfer

Melo

2009

Ciênc. agrotec.

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Saccharum officinarum

Medicinal Plants of the World, Volume 3

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Decomposition of the organic matter of natural and concentrated vinasse in sandy and clayey soils

Possignolo-Vitti

Bertoncini

Vitti

2017

Water Science and Technology

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Vinasse has been used as fertilizer by sugarcane growers, due to its potential to completely replace mineral fertilizers. However, if the application is not adequate, this practice may cause environmental contamination. This study used a respirometry test to evaluate the organic matter (OM) decomposition present in natural vinasse and concentrated vinasse (CV), with or without urea addition. The experiment involved two soil types and two types of vinasse at different application rates. The vinasse chemical characterization showed high levels of pseudo-total potassium (K) in both vinasses, which are not considered in the application rates. Decomposition rates above 90% and between 70 and 80% were obtained for sandy and clayey soils, respectively, over a brief 41-day period, indicating rapid OM decomposition. Positive priming effect was observed for CV and CV + urea treatments in sandy soil. An important implication of these findings revealed that K not available in vinasse was released in the soil solution by the OM mineralization, indicating the possibility of overestimation in the vinasse application rates. Therefore, K pseudo-total values should be considered in the calculation of the vinasse application rates. However, studies involving K mobility into soil are needed to validate this hypothesis.

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Métodos de análise quantitativa inorgânica em caldo de cana de açúcar; vinhaça e melaço: I. determinação de cálcio, magnésio, potássio, enxofre e fósforo em um mesmo extrato

Cited by 4 publications

References 6 publications

Fontes de fósforo (fluida ou sólida) na produtividade agrícola e industrial da cana-de-açúcar

Fontes de fósforo (fluida ou sólida) na produtividade agrícola e industrial da cana-de-açúcar

Saccharum officinarum

Decomposition of the organic matter of natural and concentrated vinasse in sandy and clayey soils

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