Potassium fractions with other nutrients in crops: A review focusing on the tropics

Daliparthy, Jayaram; Barker, Allen V.; Mondal, S. S.

doi:10.1080/01904169409364852

Cited by 64 publications

(33 citation statements)

References 48 publications

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“…As pointed out by Fontes (1997), the weighted yield expresses the tomato production performance better than does total yield. High K rates, as KCl, decrease yield by increasing K competition with other cations and between Cl -and − 3 NO (Cadahia et al, 1993;Daliparthy et al, 1994) and also by eventually increasing soil solution salinity.…”

Section: Resultsmentioning

confidence: 99%

Tomato yield and potassium concentrations in soil and in plant petioles as affected by potassium fertirrigation

Fontes

Sampaio

Mantovani³

2000

Pesq. agropec. bras.

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-Tomato (Lycopersicon esculentum Mill.) cv. Santa Clara was grown on a silt clay soil with 46 mg dm -3 Mehlich 1 extractable K, to evaluate the effects of trickle-applied K rates on fruit yield and to establish K critical concentrations in soil and in plant petioles. Six potassium rates (0, 48, 119, 189, 259 and 400 kg ha -1 K) were applied in a randomized complete block design with four replications. Soil and plant K critical levels were determined at two plant growth stages (at the beginning of the second and fourth cluster flowering). Total, marketable and weighted yields increased with K rates, reaching their maximum of 86.4, 73.4, and 54.9 ton ha -1 at 198, 194, and 125 kg ha -1 K , respectively. At the first soil sampling date K critical concentrations in the soil associated with K rates for maximum marketable and weighted yields were 92 and 68 mg dm Index terms: Lycopersicon esculentum, optimum rate, leaf analysis, soil analysis. PRODUÇÃO DE TOMATE E CONCENTRAÇÕES DE POTÁSSIO NO SOLO E NA PLANTA INFLUENCIADAS POR FERTIRRIGAÇÃO COM POTÁSSIORESUMO -Plantas de tomate (Lycopersicon esculentum Mill.) cv. Santa Clara foram cultivadas em solo argiloso contendo 46 mg dm -3 de K disponível (Mehlich 1), para avaliar os efeitos de doses de potássio, aplicadas na água de irrigação, por gotejamento, sobre a produção de frutos, e para determinar as concentrações críticas desse nutriente no solo e nos pecíolos. Foram utilizadas seis doses de K (0, 48, 119, 189, 259 e 400 kg ha -1 ), no desenho experimental de blocos ao acaso, com quatro repetições. As concentrações de K no solo e na planta foram determinadas em dois estádios do desenvolvimento do tomateiro (no início do florescimento do segundo e quarto cachos). As produções total, comercial e ponderada aumentaram com o aumento das doses de K, atingindo os seus máximos de 86,4, 73,4 e 54,9 t ha -1 nas doses de K correspondentes a 198, 194 e 125 kg ha -1, respectivamente. Na primeira data de amostragem, as concentrações de K no solo associadas às máximas produções comerciais e ponderada foram 92 e 68 mg dm -3 , respectivamente. As concentrações de K nas matérias secas dos pecíolos, nas amostragens realizadas nos florescimentos do segundo e quarto cacho, associadas com a máxima produção ponderada de frutos, foram de 10,30 e 7,30 dag kg -1 , respectivamente.Termos para indexação: Lycopersicon esculentum, dose ótima, análise foliar, análise de solo.

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Section: Resultsmentioning

confidence: 99%

Tomato yield and potassium concentrations in soil and in plant petioles as affected by potassium fertirrigation

Fontes

Sampaio

Mantovani³

2000

Pesq. agropec. bras.

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“…It may be the result of the "enrichment effect" caused by the inhibition of growth of shoots. Phosphorus is mainly in phospholipids and nuclear proteins, and com- cell structure and function in some non-specific functions [13]. In the present study, K deficiency promoted the accumulation of Na + in the root of 90-21-3 and D937, and little effect on shoot.…”

Section: Discussionmentioning

confidence: 68%

“…Various nutrient elements in plants were interrelationship with potassium, such as N, P, Na and Ca, etc. [13]. Studies have shown that different genotypes rice accumulation of potassium and dry matter was depressed under low K stress, but significantly increased the potassium use efficiency and Na + accumulation, eventually increased the ratio of Na + to K + [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Potassium Deficiency on Root Growth and Nutrient Uptake in Maize (Zea mays L.)

Du¹,

Zhao²,

Jiang³

et al. 2017

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Potassium (K) is an essential nutrient on the growth and development for maize (Zea Mays L.). And the developed root morphology and root activity have great significance to nutrient absorption and play an important role in the growth and development of plants. To explore the response to K-deficiency on root growth and nutrient absorption of maize, two inbred lines, 90-21-3 (Tolerance to K deficiency) and D937 (Sensitive to K deficiency) were carried out to investigate the root morphology, root activity, nutrient uptake and related traits. The results showed that K-deficiency inhibited the root growth of 90-21-3 and D937, but increased the ratio of root to shoot (R/S). The total length, root surface area, the root diameter and root volume of root system of 90-21-3 and D937 were significantly decreased by K deficiency, especially the fine root (0 -0.4 mm) in root length and root surface area. In addition, the K concentration of root in the two lines was significantly decreased, but root activity was significantly improved, which promoted the absorption of the root system to Na + . Compared with D937, 90-21-3 was able to distribute more carbohydrates from shoot to the root system under K deficiency, alleviating the inhibition of root growth. The fine root system was the main part for absorption nutrient. The length and surface area of 90-12-3 were no difference, and significantly decreased by 12.90% and 17.65% in D937 after 5 d of K deficiency. As well, the root activity of 90-21-3 was significantly increased when encountered to K deficiency, which promoted the accumulation of Na + and Ca 2+ and regulated the osmotic stress. Therefore, it could be a responding mechanism for tolerance crop by maintaining large root system, increasing root activity and adjusting nutrient absorption to adapt to K deficiency.

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“…Com base nesse trabalho, Assis (1995) avaliou diferentes relações entre os nutrientes cálcio, potássio e magnésio, não encontrando efeito dessas relações sobre o crescimento do dendezeiro, embora o equilíbrio nutricional das plantas esteja relacionado com o nível de disponibilidade dos cátions K, Ca e Mg no meio de crescimento (MENGEL e KIRKBY, 1987;DALIPARTHY et al, 1994).…”

Section: Introductionunclassified

Nutrição de mudas de açaizeiro sob relações cálcio:potássio:sódio em solução nutritiva

Sousa

Ramos²,

Carvalho³

et al. 2004

Ciênc. agrotec.

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RESUMOObjetivando-se estudar diferentes relações entre os cátions cálcio, potássio e sódio na produção de matéria seca e acúmulo de macronutrientes em mudas de açaizeiro (Euterpe oleracea Mart.), realizou-se um experimento em casa-de-vegetação no Departamento de Ciência do Solo da UFLA. Utilizou-se o delineamento estatístico em blocos casualisados com nove tratamentos em quatro repetições. Os tratamentos foram constituídos por nove relações cálcio: potássio: sódio (4:2:1, 3:3:1, 2:4:1, 1:5:1, 5:1:1, 4:1:2, 6:0:1; 0:6:1, e 4:2:0) em solução nutritiva. A unidade experimental constituiu-se de um vaso com capacidade para três litros de solução, contendo duas plantas. Avaliaram-se as seguintes características: produção de matéria seca e o acúmu-lo dos macronutrientes fósforo, cálcio, potássio, magnésio e enxofre na matéria seca da planta. A relação cálcio:potássio:sódio influenciou todas as características avaliadas; as soluções contendo cálcio, potássio e sódio nas relações 4:2:1 e 3:3:1 resultaram no desenvolvimento de mudas com maior produção de matéria seca e maior acúmulo de nutrientes.Termos para Indexação: Açaí, Euterpe oleracea, propagação. ABSTRACTAiming to evaluate the effects of different ratios of calcium, potassium and sodium cations on the mineral nutrition of açai seedlings (Euterpe oleracea Mart.), a greenhouse experiment was carried out in the Soil Science Department at the Federal University of Lavras-UFLA. The randomized block design, with nine treatments and four replications, was used. The treatments were nine ratios of calcium, potassium and sodium (4:2:1, 3:3:1, 2:4:1, 1:5:1, 5:1:1, 4:1:2, 6:0:1; 0:6:1, e 4:2:0) in the nutrient solution. The experimental unit was a plastic pot with three liters of solution, containing two plants. The total dry matter and nutrient accumulation were evaluated. The relationship calcium:potassium:sodium influenced all the appraised characteristics, and the solutions containing calcium, potassium and sodium in the ratios 4:2:1 and 3:3:1 resulted in seedlings development with larger production of dry matter and larger accumulation of nutrients. INTRODUÇÃOO açaizeiro (Euterpe oleracea Mart.) é uma importante frutífera da Amazônia, cujos frutos são extraídos e utilizados na produção de sucos, sorvetes, cremes, picolés, licores, além de outros usos. Constitui-se na principal fonte de proteínas, energia e sais minerais para os povos da floresta, sendo considerado como o segundo produto agrícola mais consumido pela população da Região Amazônica, apenas superado pela farinha de mandioca (OLIVEIRA et al., 2000).Embora se constitua em fonte básica de alimento, raros são os estudos que abordam a nutrição mineral do açaizeiro. Deve-se ressaltar que a relação existente entre um nutriente e os demais poderá influenciar sua absorção e dificultar ou impedir a absorção dos outros nutrientes. O crescimento adequado das plantas é alcançado quando são proporcionadas as melhores condições para a absorção, distribuição e observadas as devidas proporções entre os nutrientes. Quantidades...

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Potassium fractions with other nutrients in crops: A review focusing on the tropics

Cited by 64 publications

References 48 publications

Tomato yield and potassium concentrations in soil and in plant petioles as affected by potassium fertirrigation

Tomato yield and potassium concentrations in soil and in plant petioles as affected by potassium fertirrigation

Effect of Potassium Deficiency on Root Growth and Nutrient Uptake in Maize (Zea mays L.)

Nutrição de mudas de açaizeiro sob relações cálcio:potássio:sódio em solução nutritiva

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