Crescimento e absorção de nutrientes em bananeira irrigada com águas salinas

This study aimed to evaluate mine water reuse, elucidating the potential problems related to trace metal biogeochemistry focusing on Cu dynamics in water, soil, and plants. Water samples were collected from a Cu mine and a reservoir used to store mine water. Additional samples were taken from soils from an uncultivated area and a banana orchard (irrigated with mine water for at least 10 years) and plant from the irrigated area. The following parameters were analyzed: pH, redox potential, dissolved ions in water samples (e.g., Ca, Mg, Na, K, Cu, SO , and Cl), bioavailable Cu and Cu solid-phase fractionation (in soils and reservoir sediments samples), as well as Cu content in banana plants. Mine water presents high dissolved Cu concentration (mean 2.3 ± 0.0 mg L), limiting its use for irrigation. Water storage at the reservoir increased water quality, reducing dissolved Cu concentration (mean 0.2 ± 0.0 mg L), due to adsorption/precipitation as carbonates (mean 131.8 ± 24.6 mg kg), organic matter (mean 1526.2 ± 4.7 mg kg) and sulfides (mean 158.4 ± 56.9 mg kg). Despite higher water quality at the reservoir, the use of mine water increased the amount of bioavailable Cu in soils, which was primarily associated with organic matter. Increased bioavailable Cu in the soil did not increase the Cu content of banana leaves but resulted in high Cu content of roots and fruit, increasing the risk of toxicity for the population.

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Risk assessment and copper geochemistry of an orchard irrigated with mine water: a case study in the semiarid region of Brazil

Oliveira

Nóbrega

Ruiz

et al. 2018

Environ Geochem Health

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Propriedades químicas de um Argissolo tratado sucessivamente com composto de lixo urbano

Krob¹,

Moraes

Selbach

et al. 2011

Cienc. Rural

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Nutrição mineral e extração de nutrientes de planta de milho irrigada com água salina

Sousa

Lacerda

Cavalcante

et al. 2010

Rev. bras. eng. agríc. ambient.

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RESUMOA utilização de água salina na agricultura irrigada pode causar desequilíbrio nutricional e inibição competitiva na absorção de nutrientes. O objetivo deste trabalho foi avaliar os efeitos da salinidade da água de irrigação sobre o acúmulo, os totais extraídos e a distribuição de nutrientes em plantas de milho. O estudo foi conduzido em condições de campo em um Argissolo Vermelho Amarelo na estação seca, no delineamento em blocos ao acaso, com cinco repetições, de setembro a dezembro de 2007, em Fortaleza, CE. As plantas de milho foram coletadas aos 90 dias após a semeadura e realizadas as seguintes avaliações: teores, extração e distribuição de elementos minerais nas diferentes partes da planta (folha, colmo, grão e sabugo). O aumento da salinidade da água de irrigação aos 90 dias após a semeadura, inibiu o acúmulo de potássio nas folhas e de magnésio e fósforo nos grãos. A extração dos nutrientes e sódio pelas plantas irrigadas com água de salinidade variando de 0,8 a 3,6 dS m -1 obedeceu à seguinte ordem decrescente: K > Mg > Ca > P > Na; no tratamento de maior salinidade (5,0 dS m -1 ) a sequência de extração foi: K > Ca > Na > P > Mg. Palavras-chave: estresse salino, Zea mays, irrigação, elementos mineraisMineral nutrition and extraction of nutrients by corn plant irrigated with saline water ABSTRACTThe use of saline water in irrigated agriculture can cause nutritional imbalance and competitive inhibition in the absorption of nutrients. The objective of this study was to evaluate the effects of salinity of irrigation water on the accumulation, the total absorption, and the distribution of mineral elements in maize plants. The study was conducted under field conditions in an Yellow Red Argisol in the dry season, in the randomized blocks design with five replicates during September to December 2007 in Fortaleza -CE. The maize plants were collected at 90 days after sowing, and the following assessments were made: content, extraction and distribution of mineral elements in the plant parts (leaf, stem, grain and elderberry). The increase of salinity of irrigation water at 90 days after sowing inhibited the accumulation of potassium in leaves, and corn stan and phosphorus in the grains. The extraction of nutrients and sodium by plants irrigated with saline water ranging from 0.8 to 3.6 dS m -1 had the following decreasing order: K > Mg > Ca > P > Na; the treatment of higher salinity (5.0 dS m -1 ) the sequence extraction was: K > Ca > Na > P > Mg.

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Crescimento e absorção de nutrientes em bananeira irrigada com águas salinas

Cited by 4 publications

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Risk assessment and copper geochemistry of an orchard irrigated with mine water: a case study in the semiarid region of Brazil

Risk assessment and copper geochemistry of an orchard irrigated with mine water: a case study in the semiarid region of Brazil

Propriedades químicas de um Argissolo tratado sucessivamente com composto de lixo urbano

Nutrição mineral e extração de nutrientes de planta de milho irrigada com água salina

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