Phosphate sorption as related to mineralogy of a hydrosequence of soils from the Cerrado region (Brazil)

Filho, Manoel Vicente de Mesquita; Torrent, J.

doi:10.1016/0016-7061(93)90088-3

Cited by 82 publications

(24 citation statements)

References 28 publications

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“…Soils with Palisade grass had higher P levels in the labile fractions, increasing the absorption of this nutrient by plants (Silva et al, 2003). The OM in NTS also reduces the contact between soil colloids and the phosphate ion, reducing adsorption reactions, while residue decomposition (Figure 3) releases and redistributes organic, more mobile P forms that are less susceptible to adsorption reactions in the soil (Mesquita Filho and Torrent, 1993). It is also noteworthy that the maize stalks left on the soil surface after grain harvest are important K recyclers in the system (Jaremtchuk et al, 2006 = 125.0; 124.9; 121.7; 126.7; 123.9; 120.5; 126.3; 123.9; 124.9; 129.7; 122.9 and 123.8 g., respectively.…”

Section: Resultsmentioning

confidence: 99%

Autumn Maize Intercropped with Tropical Forages: Crop Residues, Nutrient Cycling, Subsequent Soybean and Soil Quality

Pereira

Mello

Pariz

et al. 2016

Rev. Bras. Ciênc. Solo

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Autumn maize intercropped with tropical forages can raise the amount of crop residues and improve nutrient cycling, favoring subsequent soybean crop. The objective of this study was to evaluate the effect of forms of implementation of intercropping of irrigated autumn maize with tropical forages on yield, decomposition, nutrient accumulation and release, and on the ratio of lignin/total N of forage residues, yield components, and grain yield of subsequent soybean, and on soil physical and chemical properties, under no-tillage in lowland Cerrado. The experiment was arranged in randomized blocks in a factorial (4 × 3 + 1) design with one control and four replications. The treatments consisted of four forages: Palisade grass, Congo grass, and two Guinea grass cultivars (Tanzânia and Áries); and three methods of sowing intercrops of forageautumn maize: forage sown simultaneously with maize in the sowing furrow, mixed with fertilizer; forage sown by broadcasting on the day of maize sowing; and forage seeds mixed with fertilizer broadcast on maize in growth stage V4; plus a control (maize monoculture). The decomposition and nutrient release rate of the forage residues were evaluated by the litter bag method, 30, 60, 90, and 120 days after desiccation. Sowing the forages in the furrow and by broadcasting raise the total amount of maize residues compared to method V4. Regardless of the forage type and sowing methods, intercropping increases the amount of residues compared to maize monoculture. The forages and sowing methods had no influence on nutrient accumulation in the residues at the time of desiccation and at the lowest lignin/total N ratio in Congo grass residues, and a logarithmic decay was observed. Forage and sowing methods did not influence the macronutrient release rate from crop residues for 120 days after desiccation; the release of N, P, K and Mg is logarithmic and the release of Ca and S exponential. Forage and sowing methods do not influence yield components and grain yield of subsequent soybean. However, intercropping increased grain yield of subsequent soybean compared to soybean after maize monoculture, and preserved the soil chemical and physical properties.

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Section: Resultsmentioning

confidence: 99%

Autumn Maize Intercropped with Tropical Forages: Crop Residues, Nutrient Cycling, Subsequent Soybean and Soil Quality

Pereira

Mello

Pariz

et al. 2016

Rev. Bras. Ciênc. Solo

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“…Calcium, Al, Fe, and silicate or oxyhydroxide clays are well known for their capacity to sorb P ions from a solution; however, there is a range in the affinity and strength of the bond, depending on where the P is binding (Castro and Torrent 1998;Weng et al, 2012). For example, Ca-bound P, as well as Fe-and Al-bound P can form insoluble precipitates, whereas P bound to clay surfaces is readily exchangeable (Freeman and Rowell 1981;Torrent et al, 1992;de Mesquita Filho and Torrent 1993). The type of clay can also have a dramatic effect on the rate, strength, and total amount of P sorbed; for example, kaolinite can sorb 53.5 times more phosphate than montmorillonite and illite (Shang et al, 2013;Gérard, 2016).…”

Section: Selected Soil Propertiesmentioning

confidence: 99%

Chemical Distribution of Phosphorus in Soils used during the Development of Sorption Isotherms

Schmitt

Pagliari

Nascimento

2017

Soil Science Soc of Amer J

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This study was developed to provide initial information on the chemical distribution of P into the different soil P pools after a soil sample underwent P sorption using 17 soil samples from the united States (13) and Brazil (4). During the sorption phase, soil samples were equilibrated with solutions containing increasing P concentrations (0-75 mg P l -1 ) following standard procedures. Following the sorption phase, the soil samples were allowed to air dry for 72 h and underwent a chemical fractionation (in water, anionic resin, 0.5M NahCo 3 , 0.1M Naoh, and 1.0M hCl). A wide range of sorption strength ranging from 0.043 to 0.289 l kg -1 and a maximum sorption ranging from 189 to 789 mg kg -1 were observed. More than 59% of the sorbed P was found in the water + resin fraction, which is considered the most labile pools where the binding energy is assumed to be low. In contrast, less than 25% of the sorbed P was found in the nonlabile pools where the binding energy is assumed to be the greatest. Although less than 25% of the sorbed P was found in the non-labile pools, the Naoh+hCl fraction contributed 2 to 61% of the overall sorption strength estimated for the soils studied. The results of this study suggest that sorption strength calculated from sorption studies are heavily skewed toward the nonlabile fraction, which was found to constitute a very small portion of the binding sites occupied during sorption studies.Abbreviations: b, the sorption maximum; ICP-OES, inductively coupled plasma optical emission spectroscopy; b f , sorption maximum determined using the sequential fractionation data; b i , sorption maximum estimated using the method of Nair et al. (1984); k, a coefficient unique to each soil that has been used as a measure of the sorption strength between soil particles and P; k f , the sorption strength parameter determined using the sequential fractionation data; k i , the sorption strength parameter estimated using the method of Nair et al. (1984); OM, organic matter; P i , inorganic P; P o , organic P; W kft , cumulative weighted sorption strength. W hen P is added to soils in the form of fertilizer, a series of reactions takes place, ranging from diffusion of P from the fertilizer granules into the soil solution, sorption of P into soil particles, and, with time, P precipitation (Hedley and McLaughlin, 2005). In the soil, inorganic P (P i ) will adsorb or precipitate by chemically binding with Al, Fe, or Ca (Lombi et al., 2006;Khatiwada et al., 2012;Eriksson et al., 2015). The solubility of phosphorus in soil is controlled by several factors, including how much P is originally adsorbed in the soil, how much P is precipitated in the soil, the soil pH, clay mineralogy, organic matter content, what types of minerals were formed during P precipitation, and the concentration of Ca, Al, Fe, and other cations in solution (Delgado and Torrent 2000;Violante and Pigna, 2002;Shigaki and Sharpley 2011;Weng et al., 2012;Eriksson et al., 2015;Gérard, 2016). McLaughlin et al. (2011) has shown that the amount of Ca...

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“…Em razão da sua presença em grandes quantidades em alguns Latossolos argilosos oxídicos muito velhos, a contribuição da gibbsita, em termos de adsorção total, pode, porém, ultrapassar a dos óxidos de ferro. 47 A atuação da caulinita em relação aos componentes oxídicos no processo de adsorção de P tende a ser menos expressiva. 43 Os ácidos orgânicos alifáticos selecionados para este estudo (cí-trico e oxálico) diferem entre si com respeito ao número de grupos carboxila, comprimento da cadeia carbônica, valores de pK e número de grupos hidroxila.…”

Section: Adsorção Individualunclassified

Adsorção e dessorção aniônicas individuais por gibbsita pedogenética

Pozza¹,

Curi²,

Guilherme³

et al. 2009

Quím. Nova

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Phosphate sorption as related to mineralogy of a hydrosequence of soils from the Cerrado region (Brazil)

Cited by 82 publications

References 28 publications

Autumn Maize Intercropped with Tropical Forages: Crop Residues, Nutrient Cycling, Subsequent Soybean and Soil Quality

Autumn Maize Intercropped with Tropical Forages: Crop Residues, Nutrient Cycling, Subsequent Soybean and Soil Quality

Chemical Distribution of Phosphorus in Soils used during the Development of Sorption Isotherms

Adsorção e dessorção aniônicas individuais por gibbsita pedogenética

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