Phosphorus Fractions
Mostrando 1-12 de 92 artigos, teses e dissertações.
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1. Phosphorus fractions in Cerrado Oxisols fertilized with liquid swine wastewater
RESUMO O conhecimento das formas de acumulação de fósforo (P) em solos, que receberam sucessivas aplicações de dejetos de suínos é essencial para prevenir o risco potencial de contaminação das águas superficiais. O objetivo deste estudo foi avaliar as formas de acúmulo de P em Oxisols de Cerrado submetidos a sucessivas aplicações de dejeto líqu
Revista Brasileira de Engenharia Agrícola e Ambiental. Publicado em: 2022
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2. Soil phosphorus fractions and their relation to leaf litterfall in a central Amazonian terra firme rainforest
RESUMO A ciclagem de fósforo (P), mesmo sendo pouco estudada, é importante para o equilíbrio de macronutrientes em ecossistemas de floresta tropical úmida. Como P no solo ocorre em diferentes formas orgânicas e inorgânicas (frações), com diferentes graus de labilidade, supomos que essas frações variam temporalmente entre os diferentes tipos de solo
Acta Amazonica. Publicado em: 2022
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3. Tillage systems and cover plants change organic fractions of phosphorus in oxisol of eastern Amazonia
ABSTRACT Due to the large extent of degraded areas in the Amazon, the use of conservation systems is very important to contain the advance of the agricultural frontier, and may favor the availability of nutrients such as phosphorus (P). This study evaluated effect of tillage systems on and cover plants distribution of organic P fractions (Po) in oxisol under
Bragantia. Publicado em: 2020-09
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4. Synthesis of enriched biochar as a vehicle for phosphorus in tropical soils
RESUMO O fósforo (P) é um dos nutrientes que mais limita a produtividade agrícola, principalmente em solos tropicais. Biocarvão enriquecido tem sido proposto com o intuito de incrementar a biodisponibilidade de P e de outros nutrientes no solo. Assim, objetivou-se avaliar a disponibilidade do fósforo em biocarvão fosfatado (composto de biomassa e solo)
Acta Amaz.. Publicado em: 04/11/2019
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5. Phosphorus fractions in soil cultivated with vineyards after 62 years of poultry litter addition
Resumo: O objetivo deste trabalho foi avaliar as modificações de frações de fósforo em um Cambissolo Húmico cultivado com vinhedos, após 62 anos de fertilização adicional com cama-de-aves. Amostras de solo foram coletadas de dois vinhedos (V1 e V2) e de uma área de floresta (F) adjacente a eles. Foram aplicados 1.362 e 910 kg ha-1 de P ao V1 e ao V
Pesq. agropec. bras.. Publicado em: 05/09/2019
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6. Phosphate Sources and Filter Cake Amendment Affecting Sugarcane Yield and Soil Phosphorus Fractions
ABSTRACT: The use of mineral phosphate fertilizers associated with organic residues can improve fertilizer use efficiency and consequently decrease their usage costs. Soil application of filter cake (FC) can provide nutrients and enhance physical quality. This study aimed to evaluate the effects of different phosphate fertilizers [rock phosphate (RP) and tri
Rev. Bras. Ciênc. Solo. Publicado em: 27/05/2019
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7. Phosphorus Fractions in Soil with Organic and Mineral Fertilization in Integrated Crop-Livestock System
ABSTRACT Use of organic fertilizers in integrated crop-livestock (iCL) systems may affect soil phosphorus fractions. This study aimed to determine phosphorus fractions in the soil under the iCL system after six years of application of organic or mineral fertilizers. The experiment was conducted on a Rhodic Kandiudox (Nitossolo Vermelho Distroférrico) in a r
Rev. Bras. Ciênc. Solo. Publicado em: 14/02/2019
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8. Applying Different Sample Treatment Strategies for Evaluating Phosphorus Distribution in Orange Juice
Assessment of phosphorus in fruit juices is of great interest due to its essentiality and nutritional properties. This study applied sample treatment strategies to determine phosphorus in fractions of juices. Firstly, total phosphorus (Ptotal) was determined from digestion and sample suspension exploring direct analysis by inductively coupled plasma optical
J. Braz. Chem. Soc.. Publicado em: 2018-07
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9. Phosphorus Forms in Sediments as Indicators of Anthropic Pressures in an Agricultural Catchment in Southern Brazil
ABSTRACT Phosphorus (P) fractionation is a suitable procedure to ascertain P lability in sediments and is able to distinguish sources of P under different soil management practices in a catchment. Brazil is the second largest producer and the largest exporter of tobacco in the world. Inadequate management of cultivated areas exposes the soil to erosion proce
Rev. Bras. Ciênc. Solo. Publicado em: 04/12/2017
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10. Utilization and fate of phosphorus of different sources applied to cohesive soil of Amazonian periphery
ABSTRACT In the Amazonian region, P is often a primary factor limiting sustainable agrosystems. We compared the efficiencies of local aluminous phosphate (ALP) and single superphosphate (SSP) under a cover of leguminous residues to determine the fate of P sources in an Amazonian soil with hardsetting characteristics. The experiment followed a randomized bloc
Sci. agric. (Piracicaba, Braz.). Publicado em: 2017-06
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11. Phosphorus fractions in apple orchards in southern Brazil
ABSTRACT Phosphorus (P) applications at dosages higher than the necessary may cause P buildup in the soil labile fractions and, consequently, pollution of water sources. This study aimed to assess accumulation of P fractions as well as the parameters of adsorption isotherms in soil profiles having a history of application of phosphate fertilizers and cultiva
Bragantia. Publicado em: 29/05/2017
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12. Litterfall and Nutrient Dynamics in a Mature Atlantic Rainforest in Brazil
ABSTRACT We assessed litterfall and nutrient cycling in an old-growth Atlantic rainforest in southern Brazil. Plant litter collected monthly was separated into: leaves, twigs, reproductive organs, and fragments, and dried, weighed, and ground. Determination of carbon, nitrogen, phosphorus, potassium, calcium, magnesium, and sodium contents of different litte
Floresta Ambient.. Publicado em: 15/05/2017