Extração e exportação de nutrientes em cultivares de batata: I - macronutrientes

Fernandes, Adalton Mazetti; Soratto, Rogério Peres; Silva, Beatrice Luciana

doi:10.1590/s0100-06832011000600020

Cited by 83 publications

(135 citation statements)

References 23 publications

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“…To MEDEIROS et al (2005) and COSTA et al (2011) in study with mango, elements with great mobility in the phloem as phosphorus, potassium and magnesium (MARSCHNER, 2012) have defined tendency to decrease with the age of the leaves, a fact proven by FERNANDES et al (2011) for those nutrients in potato tubers.…”

Section: Resultsmentioning

confidence: 98%

Nutrient Contents in ‘Tommy Atkins’ Mango Leaves at Flowering and Fruiting Stages

et al. 2016

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ABSTRACT:The objective of this study was to evaluate the nutrient contents in 'Tommy Atkins' mango leaves at the flowering and fruiting stages under different strategies to reduce irrigation levels during flower induction. Five irrigation level reduction strategies, based on crop evapotranspiration (ETc) were used in the plots: T1 (0% ETc), T2 (25% ETc), T3 (50% ETc), T4 (75% ETc) and T5 (100% ETc); two production cycles in the split-plots; and in two development stages, flowering and harvest, in the split-split plots. The content of N, P, K, Ca, Mg, and S, as well as B, Cu, Fe, Mn, Zn, and Na was determined and leaf chlorophyll index was measured during the second cycle. The content of P, K, Mg, and Cu in the 'Tommy Atkins' mango trees leaves varied according to phases and cycles, regardless of the strategies to reduce irrigation levels in floral induction. The contents of N, Ca, B, Fe, Mn, and Na varied with stages and with the production cycles, in an independent manner. Foliar N contents were above the sufficiency range at the different development stages and cycles evaluated. The indices of a, b, and total chlorophyll varied independent of reading time. The nutrient contents with lower mobility in the plant, Ca, B, Fe and Mn increase in 'Tommy Atkins' mango trees leaves from flowering to fruiting, with the return of irrigation at 100% crop evapotranspiration, while the levels of N, P, K and Mg, nutrients with high mobility in plant decrease.

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Section: Resultsmentioning

confidence: 98%

Nutrient Contents in ‘Tommy Atkins’ Mango Leaves at Flowering and Fruiting Stages

et al. 2016

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“…This accumulation in the initial period of development and its later reduction were also observed by the authors in the cultivars Asterix, Atlantic, Markies, and Mondial. Fernandes, Soratto, and Silva (2011), studying the extraction and exportation of nutrients in the Ágata cultivar, found a P content in the leaf of 5.3 g kg -1 in an analysis conducted at 48 DAP. The high content was expected due to the high level of the element present in the soil before planting and the high doses of P fertilizers added to the area.…”

Section: Resultsmentioning

confidence: 99%

Influence of phosphate fertilization on phosphorus levels in foliage and tuber yield of the potato cv. Ágata

et al. 2013

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The healthy development of potato tubers requires, among other agricultural practices, proper fertilization. Potato crops require large amounts of nutrients, and therefore consume a large amount of fertilizer. In Brazilian soils, phosphorus is the nutrient that produces the highest response in tuber yields. The objective of this work was to study the effect of different levels of phosphorus fertilizer on the potato cultivar Ágata, by evaluating foliar levels of phosphorus and tuber yield under field conditions. The experiment was conducted at the Experimental Station of the Agriculture Cooperative Alto Paranaíba (COOPADAP) in Rio Paranaiba, Minas Gerais, during the 2008/2009 growing season. Treatments consisted of five doses of phosphorus (P 2 O 5 ) (0, 200, 400, 600, and 800 kg ha -1 ), with superphosphate as the source. The phosphorus content in the leaves of potato plants decreased with increasing doses of phosphorus in the soil. The crop showed an increase in tuber productivity with increasing doses of phosphorus, reaching a maximum estimated productivity of 49.11 t ha -1 with the application of approximately 700 kg ha -1 P 2 O 5 .

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“…2016 A batata (Solanum tuberosum) é um dos alimentos mais consumidos no mundo e um dos dez principais produtos agrícolas brasileiros. Essa cultura caracteriza-se por apresentar sistema radicular superficial, ciclo curto e elevada produtividade, fatores esses que fazem com que a batateira exija quantidades relativamente grandes de nutrientes (Fernandes et al, 2011a;Soratto et al, 2011).…”

Section: Pesquisa / Researchunclassified

“…Assim, por ser um cultivo de custo elevado, muitos produtores não acatam as recomendações técnicas de adubação (Nava et al, 2007;Fernandes et al, 2011a) e utilizam altas doses de fertilizantes no momento do plantio na expectativa de garantirem elevadas produtividades (Quadros et al, 2009). Nesse cenário, o fósforo (P) tem sido o nutriente aplicado em maiores quantidades, por causa da sua baixa disponibilidade e elevada fixação na maioria dos solos brasileiros (Fernandes & Soratto, 2012).…”

Section: Pesquisa / Researchunclassified

Influência do fósforo na qualidade e produtividade de tubérculos de cultivares de batata de duplo propósito

et al. 2016

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Phosphorus influence on quality and yield of tubers of dual purpose potato cultivars Even in areas with high levels of phosphorus (P) available in the soil, application of this nutrient is common, aiming to increase potato tuber yield and size. However, the effect of high P rates on tuber yield and quality is not known in these cases. The objective of this study was to evaluate the influence of P fertilization on yield and characteristics of tuber quality of dual purpose potato cultivars, grown in soils with low (14 mg/dm 3 ), medium (36 mg/dm 3 ) and high (70 mg/dm 3 ) P availability. In the three soils, we used the randomized blocks design in a 2x5 factorial scheme, with four replications. The treatments consisted of two potato cultivars (Asterix and Markies) and five P 2 O 5 rates (0, 125, 250, 500, and 1,000 kg/ha). The cultivar Markies was less productive than Asterix but had tubers with higher quality characteristics, such as firmness, soluble solids, titratable acidity, pulp pH and protein concentration. In soils with low, medium and high P availability, the marketable tuber yield of both cultivars was increased by 376%, 41%, and 26%, respectively, up to maximum agronomic rates of 500, 255, and 239 kg/ha P 2 O 5 . Under low P availability, fertilization increased the average weight, firmness, pulp pH and starch concentration, and decreased the reducing sugar concentration in tubers. In soils with higher P availability, besides having exercised less influence on the yield and quality of tubers, the phosphate fertilizer increased levels of reducing sugars in tubers up to the rate of 453 kg/ha P 2 O 5 , which is not interesting for the industrial processing of potatoes.

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Extração e exportação de nutrientes em cultivares de batata: I - macronutrientes

Cited by 83 publications

References 23 publications

Nutrient Contents in ‘Tommy Atkins’ Mango Leaves at Flowering and Fruiting Stages

Nutrient Contents in ‘Tommy Atkins’ Mango Leaves at Flowering and Fruiting Stages

Influence of phosphate fertilization on phosphorus levels in foliage and tuber yield of the potato cv. Ágata

Influência do fósforo na qualidade e produtividade de tubérculos de cultivares de batata de duplo propósito

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