Agronomic efficiency of potassium fertilization in lettuce fertilized with alternative nutrient sources

Guelfi-Silva, Douglas Ramos; Marchi, Giuliano; Spehar, Carlos Roberto; Guilherme, Luiz Roberto Guimarães; Faquin, Valdemar

doi:10.1590/s1806-66902013000200008

Cited by 12 publications

(5 citation statements)

References 20 publications

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“…As for complementary base fertilization (CBF) with MBR, yield improvement was expected through the application of this nutritional supplement due to diverse nutrient composition of the matrix used. Guelfi-Silva et al (2013), while assessing the effect of alternative nutrient source application in potassium fertilization nutrition, yield and efficiency on lettuce, found that increasing alternative nutrient source doses application promoted nutritional improvements and lettuce yield increase. However, this effect was not verified in isolation, and differences were only observed in interactions with the cultivar factor.…”

Section: Resultsmentioning

confidence: 99%

Foliar fertilization with gradual release of shale-based nutrients in strawberry and its effect on yield and compounds with functional potential

Araujo¹,

Vignolo²,

Perin³

et al. 2016

Científica

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The aim of this study was to evaluate the influence of a fertilizer matrix of shale-based by-products and shale water as an alternative fertilization on strawberry culture. Were used 16 treatments, which resulted from the combination of three factors levels: cultivar (with two levels: Camarosa and Camino Real), allocated in plot, complementary base fertilization (with two levels: with and without MBR fertilizer matrix at a dose of 2000 kg ha-1), allocated in subplots and foliar fertilization (with four levels: Shale water, shale water + boron, shale water + calcium and a control without foliar fertilization), allocated in the sub-subplot. Yield, functional compounds and fruit chemical analysis were investigated. The production obtained in strawberry crop was similar or higher than national average. In the conditions of this study, in area with high level of initial fertility, the complementary base fertilization with MBR and foliar fertilization with shale water-based, did not influence the variables of quality such as the functional properties and chemical characteristics of strawberry fruits. Similarly, the added micronutrients in leaf fertilization shale water-based, Ca and B did not influence the yield and quality variables of studied culture.

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Section: Resultsmentioning

confidence: 99%

Foliar fertilization with gradual release of shale-based nutrients in strawberry and its effect on yield and compounds with functional potential

Araujo¹,

Vignolo²,

Perin³

et al. 2016

Científica

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“…Bertossi et al (2013) report increasing values for phosphorous usage efficiency with increasing dosages of P, varying from 2.98 to 17.11 mg dry matter per g P applied, for dosages in the range of 0 to 500 mg P kg -1 . However, most research into N, P and K for various crops (FAGERIA;SANTOS;MORAES, 2010;SILVA et al, 2011;GUELFI-SILVA et al, 2013) show that there is a reduction in P usage with increases in the applied dosage, due to greater losses in the soil-plant-atmosphere system.…”

Section: First Cropmentioning

confidence: 99%

Productive characteristics, nutrition and agronomic efficiency of polymer-coated MAP in lettuce crops

Chagas

Emrich

Guelfi

et al. 2015

Revista Ciência Agronômica

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-In contrast to enhanced-efficiency nitrogen fertilisers, principally urea, phosphate fertilisers have been little studied and the available information is limited. The aim of this work therefore was to evaluate the productive and nutritional characteristics and the agronomic efficiency of a polymer-coated MAP fertilizer on two subsequent lettuce crops. The experiment was carried out in a greenhouse, in pots with a capacity of 4 kg, filled with a dystrophic yellow Latosol of a clayey texture. The experimental design was completely randomised and the treatments arranged in a 2 x 5 factorial scheme: two sources of phosphorus (P) (MAP and polymer-coated MAP), applied to the plots in five dosages (0, 100, 200, 400, 800 mg P 2 O 5 kg -1 ) with three replications. The results showed that the polymer-coated MAP increased the efficiency of the phosphate fertilizer in both lettuce crops, improving utilisation of the residual phosphorus. The agronomic efficiency of fertilization decreases with the increases in applied phosphorus. The production and nutritional characteristics of the lettuce were influenced by the levels of P 2 O 5 and the use of MAP with polymers. Higher values for dry and fresh weight and for the accumulation of P in the first crop occurred with the use of polymer-coated MAP at dosages of 506.9, 450.1 and 522.8 mg kg -1 P 2 O 5 .Key words: Phosphate fertilizer. Residual effect. Lactuca sativa L.RESUMO -Contrariamente aos fertilizantes nitrogenados de eficiência aumentada, principalmente a ureia, os fertilizantes fosfatados foram pouco estudados e as informações disponíveis são limitadas. Dessa forma, objetivou-se com o presente trabalho avaliar as características produtivas, nutricionais e a eficiência agronômica da adubação fosfatada com MAP revestido com polímeros em dois cultivos subsequentes de alface. Foi conduzido um experimento em casa de vegetação em vasos com capacidade para 4 kg de solo preenchido com um Latossolo Vermelho distrófico de textura argilosa. O delineamento experimental foi inteiramente casualizado e os tratamentos distribuídos em arranjo fatorial 2 x 5: duas fontes de fósforo (P) (MAP e MAP revestido com polímeros) aplicadas nas parcelas em cinco doses (0; 100; 200; 400; 800 mg P 2 O 5 kg -1 ), com três repetições. Os resultados mostraram que o MAP revestido com polímeros promoveu maior eficiência da adubação fosfatada nos dois cultivos da alface, melhorando o aproveitamento do fósforo residual. A eficiência agronômica da adubação diminui com o aumento na quantidade de fósforo aplicada. As características produtivas e nutricionais da alface foram influenciadas pelas doses de P 2 O 5 e com a utilização do MAP + polímeros. A maior massa seca e fresca e acúmulo de P no primeiro cultivo ocorreram com a utilização do MAP revestido por polímeros nas doses de 506,9; 450,1; 522,8 mg kg -1 de P 2 O 5 .Palavras-chave: Fertilizante fosfatado. Efeito residual. Lactuca sativa L.

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“…According to Guelfi-Silva et al (2013), there is still the possibility of using residues from other productive sectors, such as the silicate powder rocks originated from mining subproducts. Although there is no global estimative of the subproducts quantity generated by the mining industry, in 2014, only the European Union produced 2503 million tons of mining wastes (Euro Stat 2017).…”

Section: Introductionmentioning

confidence: 99%

Nutrients release from powder phonolite mediated by bioweathering actions

Tavares

Carvalho

Camargo

et al. 2018

Int J Recycl Org Waste Agricult

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Purpose Silicate rock powders have been appointed as possible nutrient alternative sources which might enhance the agricultural sector sustainability. However, the application of those materials directly in soil presents as main limitations the low content and solubility of the mineral nutrient sources. In this perspective, the aim of the present study was to evaluate, in a bioweathering perspective, the conjunct application potential of phonolite with organic composts over the nutrients release in soil, as well as the production and nutrition of brachiaria grass (Urochloa decumbens). In addition, it was sought to assess the composting process effectiveness in improving the nutrient release from this rock. Method An experiment was conducted with five treatments (control; enriched compost with powder rock at 10%; mixed compost with powder rock at 10%; solely powder rock; solely compost) and four repetitions. Results The alternative sources positively influenced the productivity, as well as the K and Si contents at the aerial part of the brachiaria grass and the nutrient release in soil. However, the conjunct applications of powder phonolite with organic composts were the source which the best promoted the total nutrient biorelease to soil. Conclusion Nevertheless, there was no evidence that the composting process promotes the phonolite bioweathering. On the other hand, the conjunct application of powder phonolite with organic composts, either as an initial component to the composting pile or additive to the stabilized composts, is a strategy which enhances the nutrient biorelease of the mineral source.

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Agronomic efficiency of potassium fertilization in lettuce fertilized with alternative nutrient sources

Cited by 12 publications

References 20 publications

Foliar fertilization with gradual release of shale-based nutrients in strawberry and its effect on yield and compounds with functional potential

Foliar fertilization with gradual release of shale-based nutrients in strawberry and its effect on yield and compounds with functional potential

Productive characteristics, nutrition and agronomic efficiency of polymer-coated MAP in lettuce crops

Nutrients release from powder phonolite mediated by bioweathering actions

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