16 results

Phosphate fertilization strategies and placement effects on grain crop yields in subtropical no-till Oxisols

Andria Paula Lima ORCID logo , Sandra Mara Vieira Fontoura ORCID logo , Renato Paulo de Moraes ORCID logo , Cimélio Bayer ORCID logo , Luke Gatiboni ORCID logo , Tales Tiecher ORCID logo

06/Aug/2025

ABSTRACT Subtropical Oxisols have a high phosphate adsorption capacity and consequently lower phosphorus (P) availability. Therefore, correct management of phosphate fertilization in grain crop rotations is essential to increase the P-use efficiency and minimize potential environmental impacts. This study aimed to evaluate, in soils with medium and high initial P level, fertilization strategies (crop and system fertilization) and placement’s effects (banded P and broadcast) on soil available P, crop yield, and P use efficiency. Two field trials were installed on […]

Visual Abstract

Use and recovery of P reserves in Southern Brazil Oxisols under no-till with low and high P availability

Magno Batista Amorim ORCID logo , Sandra Mara Vieira Fontoura, Tales Tiecher ORCID logo , Renato Paulo de Moraes, Cimelio Bayer ORCID logo

10/Sep/2024

ABSTRACT The accessibility of soil P reserves by plants on highly weathered Brazilian soils remains unclear. In this study, we assessed the contribution of soil P fractions to P uptake by soybean plants in two no-till Oxisols (Latossolos), with low and high initial content of available P. The recommended P rates (viz., 153 and 50 kg ha-1 yr-1 in the low-P and high-P soil, respectively) were applied in the form of triple superphosphate (TSP) or Bayovar rock phosphate (BRP) plus […]

Visual Abstract

Refining phosphorus fertilizer recommendations based on buffering capacity of soils from southern Brazil

Gilmar Luiz Mumbach ORCID logo , Luciano Colpo Gatiboni ORCID logo , Daniel João Dall’Orsoletta ORCID logo , Djalma Eugenio Schmitt ORCID logo , Douglas Luiz Grando ORCID logo , Abelino Anacleto de Souza Junior ORCID logo , [...]

16/Mar/2021

ABSTRACT The phosphorus (P) rates recommended for corrective fertilization-P of soils from southern Brazil may be insufficient to reach the critical level for optimal plant growth. This study aimed to quantify the fertilizer-P rates for total correction fertilization with varying soil buffering capacity in the states of Rio Grande do Sul (RS) and Santa Catarina (SC). Soil samples from 0.00-0.10 and 0.10-0.20 m layers were collected from 41 locations distributed in both states. Twelve P rates were applied to each […]

Visual Abstract

Establishing environmental soil phosphorus thresholds to decrease the risk of losses to water in soils from Rio Grande do Sul, Brazil

Luciano Colpo Gatiboni ORCID logo , Rodrigo da Silveira Nicoloso ORCID logo , Gilmar Luiz Mumbach ORCID logo , Abelino Anacleto de Souza Junior ORCID logo , Daniel João Dall’Orsoletta ORCID logo , Djalma Eugênio Schmitt ORCID logo , [...]

17/Aug/2020

ABSTRACT The overloading of soil with manure or mineral fertilizers enhances phosphorus (P) availability, promoting its loss to water bodies and increasing the risk of eutrophication. In this sense, the establishment of an environmental P threshold is a simple and useful tool to classify soils regards its risk of P losses. Here we propose a P-threshold for soils from the state of Rio Grande do Sul (RS) in Brazil, with the soil clay content as the principal variable of the […]

Visual Abstract

Substitution of Clay Content for P-Remaining as an Index of the Phosphorus Buffering Capacity for Soils of Rio Grande do Sul

Douglas Antonio Rogeri, Clesio Gianello, Leandro Bortolon, Magno Batista Amorim

23/Aug/2016

ABSTRACT Mehlich-1 soil extract is currently used in Rio Grande do Sul (RS) and Santa Catarina (SC) States, in Brazil, to evaluate soil phosphorus available to plants and Mehlich-1 is sensitive to soil buffering capacity. This limitation is overcome partly by soil separation into buffering classes based on soil clay content. However, soil clay content has some technical and operational limitations, such as the underestimation of soil clay levels in soils under no-till. The aim of this study was to […]

Agronomic efficiency of rock phosphates in a soil with high exchangeable calcium content

Richard Matos de Souza, Lafayette Franco Sobral, Pedro Roberto Almeida Viégas, Adilson de Oliveira Junior, Maria da Conceição Santana Carvalho

01/Dec/2014

The vast majority of studies done on direct application of rock phosphates in Brazil have been performed in soils with pH less than 5.5 and low exchangeable Ca content. Studies under soil conditions different from these are not only rare, but have not been carried out because these soils may be restrictive to dissolution of these sources, depending on the species grown and the geological nature of the phosphate applied. A completely randomized block split-plot experimental design was set up, […]

Accumulation of phosphorus fractions and contamination potential in vineyard soils in the southern region of the state of Santa Catarina, Brazil

Djalma Eugênio Schmitt, Jucinei José Comin, Carlos Alberto Ceretta, Luciano Colpo Gatiboni, Tales Tiecher, Felipe Lorensini, [...]

01/Oct/2013

In vineyards, if phosphate is applied both before planting and at intervals during growth without consideration of technical criteria, the soil P fractions may be increased and their proportions altered. This study was carried out to evaluate the accumulation of P fractions and the parameters of the adsorption isotherm in a sandy Typic Hapludalf soil in vineyards with a history of successive and excessive phosphate fertilization. In December 2010, two vineyards were selected, one 4 and the other 15 years […]

Phosphorus fractions in sandy soils of vineyards in southern Brazil

Djalma Eugênio Schmitt, Jucinei José Comin, Luciano Colpo Gatiboni, Tales Tiecher, Felipe Lorensini, George Wellington Bastos de Melo, [...]

01/Apr/2013

Phosphorus (P) applications to vineyards can cause P accumulation in the soil and maximize pollution risks. This study was carried out to quantify the accumulation of P fractions in sandy soils of vineyards in southern Brazil. Soil samples (layers 0-5, 6-10 and 11-20 cm) were collected from a native grassland area and two vineyards, after 14 years (vineyard 1) and 30 years (vineyard 2) of cultivation, in Santana do Livramento, southern Brazil, and subjected to chemical fractionation of P. Phosphorus […]

Management systems and the carbon and nitrogen stocks of cerrado oxisol under soybean-maize succession

Rafael de Souza Nunes, André Alves de Castro Lopes, Djalma Martinhão Gomes de Sousa, Ieda de Carvalho Mendes

01/Aug/2011

Carbon and N stocks in soils are determined by the balance between addition and losses, and tillage and cropping systems are decisive in this process. This study aimed to evaluate the effect of soil management systems based on tillage, cover crops and P fertilization on C and N stocks in physical fractions of the soil organic matter and on microbial biomass and respiration in a soil after 11 years under soybean-maize rotation. The experiment was initiated in 1999 in an […]

Soil phosphorus dynamics and availability and irrigated coffee yield

Thiago Henrique Pereira Reis, Paulo Tácito Gontijo Guimarães, Antônio Eduardo Furtini Neto, Antônio Fernando Guerra, Nilton Curi

01/Apr/2011

Research data have demonstrated that the P demand of coffee (Coffea arabica L.) is similar to that of short-cycle crops. In this context, the objective of this study was to evaluate the influence of annual P fertilization on the soil P status by the quantification of labile, moderately labile, low-labile, and total P fractions, associating them to coffee yield. The experiment was installed in a typical dystrophic Red Latosol (Oxisol) cultivated with irrigated coffee annually fertilized with triple superphosphate at […]

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