Formas de fósforo no solo sob pastagens naturais submetidas à adição de fosfatos

Oliveira, Leandro Bittencourt de; Tiecher, Tales; Quadros, Fernando Luíz Ferreira de; Trindade, J. P. P.; Gatiboni, Luciano Colpo; Brunetto, Gustavo; Santos, Danilo Rheinheimer dos

doi:10.1590/s0100-06832014000300018

Cited by 18 publications

(13 citation statements)

References 35 publications

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“…Sufficient P concentrations in the soil indicated that grasses grown without P limitation resulted in higher shoot DM and relative growth rate (RGR). This result was in agreement with Gatiboni et al (2000) and Oliveira et al (2014), who reported that P is the nutrient that limits the forage yield in natural grasslands of South America.…”

Section: Discussionsupporting

confidence: 93%

Phosphorus fractionation in grasses with different resource-acquisition characteristics in natural grasslands of South America

et al. 2019

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The natural grasslands in South America have soils with low phosphorus (P) availability (1.0 to 7.5 mg kg−1), possibly altering the absorption and accumulation of P in grasses. We evaluated the chemical fractionation of P in the leaves of the most important grasses present in these grasslands to better understand the mechanisms involved in the storage of P. The grasses studied were Axonopus affinis and Paspalum notatum (fast tissue cycling and high nutrient demand) and Andropogon lateralis and Aristida laevis (slow tissue cycling and low nutrient demand). They were grown in pots filled with an Ultisol with two levels of P: control, and addition of 50 mg P kg–1. The main P fractions were the inorganic soluble (44%) and P in RNA (26%). Addition of P increased the total P concentration, following the order A. affinis (140%) > P. notatum (116%) > A. lateralis (81%) > A. laevis (21%). In conclusion, the species A. affinis and P. notatum responded to P fertilization with high variation and accumulating P in less-structural chemical forms, such as inorganic P. The species A. lateralis and A. laevis showed low variation in the concentration of P forms, with higher P concentrations in structural forms.

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Section: Discussionsupporting

confidence: 93%

Phosphorus fractionation in grasses with different resource-acquisition characteristics in natural grasslands of South America

et al. 2019

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“…This means that P solubility from BRP and ARP is very low in the short to medium term, especially in soils with higher Ca levels and high pH, as observed in the initial soil characterization of the present study. As soil samples were collected after the second year of sugarcane cultivation/fertilizer application, it implies that BRP and ARP were not effective in keeping the adequate levels of soil available P. Similar results were reported by Oliveira et al (41) in a study evaluating soil P fractions under pasture subjected to phosphate amendment.…”

Section: Soil P Fractionssupporting

confidence: 76%

“…As there were no differences in Pi NaOH 0.1 mol L −1 fraction between ARP, BRP, and the control, there was low dissolution of these rock phosphates throughout the two crop cultivation seasons, even under acidic soil conditions and under low P and Ca original levels. Oliveira et al (41), evaluating soil P fractions under natural pasture under phosphate sources, also reported low reactivity of Gafsa rock phosphate. Moreover, the amount of P in moderately labile fraction was higher under TSP, reaching mean values of 51.8 mg kg −1 of Pi + Po than 44.7 mg kg −1 of the same fractions for non-fertilized soil (Table 1).…”

Section: Labilementioning

confidence: 97%

Phosphorus Dynamics in Sugarcane Fertilized With Filter Cake and Mineral Phosphate Sources

et al. 2021

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Organic residual material such as filter cake, combined with mineral phosphate fertilizers, may alter the soil phosphorus (P) bioavailability for sugarcane as a consequence of the competing effect in adsorption sites. This study aimed to quantify the changes in both the inorganic and organic soil P fractions as amended by phosphate fertilizer sources and filter cake and to link the P fractions to sugarcane response. An experiment was conducted in an Oxisol, in a randomized block design with factorial arrangement of 4 × 2, and three replications. Three P fertilizer sources (triple superphosphate, Araxá rock phosphate, and Bayóvar® reactive phosphate) plus a control (no P) were evaluated under both the presence and absence of filter cake. At the end of the second crop cycle, the following were measured: the cane yield, the tissue P content, and soil P fractions. All fertilizer sources were efficient in supplying P to sugarcane. Araxá rock phosphate generated a higher accumulation in moderately labile P, whereas the soluble triple superphosphate resulted in higher labile P. The filter cake, as a source of nutrients and organic matter, has an important contribution to maintain more available P for sugarcane absorption, especially when associated with triple superphosphate. The amount of P absorbed by sugarcane was correlated with the soil labile P (r = 0.58) and also with the inorganic P moderately labile (r = 0.42). Both fractions must be taken into account for a short- to medium-term availability of P for sugarcane in Oxisols.

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“…Para o fósforo (P) o comportamento se alterou nas médias em profundidade devido a aplicação do nutriente na época do plantio, e dentro dos tratamentos se manteve constante. Isto pode ser explicado pela afirmação de que o P é elemento pouco móvel, permanecendo no local onde foi depositado (OLIVEIRA et al, 2014).…”

Section: Resultsunclassified

Aplicação de calcário em superfície: estudo da influência nas propriedades químicas de um latossolo vermelho distrófico sob o cultivo de cana-de-açúcar.

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Farinelli

Junior

et al. 2017

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A aplicação superficial de calcário ainda gera dúvidas quanto a sua eficiência na correção da acidez do solo no sistema plantio direto. Entretanto tem-se observado que os efeitos da aplicação de calcário têm ocorrido em profundidade e em períodos de tempo relativamente curtos, apesar da sua baixa solubilidade no solo. O trabalho teve por objetivo avaliar as alterações químicas de um Latossolo Vermelho em função da granulometria do calcário sob o cultivo de cana-de-açúcar. O delineamento experimental utilizado foi esquema fatorial 2x2, resultantes da combinação de 2 fontes de calcário (PRNT = 70% e PRNT = 103%) com dois modos de aplicação (aplicado em superfície e incorporado), mais um tratamento controle, todos com 3 repetições, totalizando 21 parcelas. Foram realizadas análises químicas (pH, M.O., P, K, Ca, Mg, H+Al, CTC e saturação por bases) do solo coletado nas camadas de 0 - 0,20 m e 0,20 - 0,40 m aos 3 meses após a aplicação do corretivo. Os resultados evidenciaram, que a granulometria do calcário não alterou nenhum atributo químico do solo, entretanto ao se avaliar as profundidades nota-se que o efeito do calcário ocorreu apenas na camada superficial, onde todos os parâmetros avaliados foram superiores nesta camada em relação à subsuperficial, demonstrando que em dois

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Formas de fósforo no solo sob pastagens naturais submetidas à adição de fosfatos

Cited by 18 publications

References 35 publications

Phosphorus fractionation in grasses with different resource-acquisition characteristics in natural grasslands of South America

Phosphorus fractionation in grasses with different resource-acquisition characteristics in natural grasslands of South America

Phosphorus Dynamics in Sugarcane Fertilized With Filter Cake and Mineral Phosphate Sources

Aplicação de calcário em superfície: estudo da influência nas propriedades químicas de um latossolo vermelho distrófico sob o cultivo de cana-de-açúcar.

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