Aplicação de gesso agrícola e especiação iônica da solução de um Latossolo sob sistema plantio direto

Zambrosi, Fernando César Bachiega; Alleoni, Luís Reynaldo Ferracciú; Caires, Eduardo Fávero

doi:10.1590/s0103-84782007000100018

Cited by 52 publications

(63 citation statements)

References 9 publications

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“…The pH increased after black oat and maize cultivation in the solution of all treatments; this may indicate OH -/HCO 3 -exudation by plant roots, as a form of maintaining the electrochemical equilibrium, due to the absorption of anions such as NO 3 -, whose concentration in the solution decreased in all layers due to the cultivation of two grass species, which have a high demand for N, but also for P and SO 4 2-in the surface layers (Table 1) (Gahoonia et al, 1992). Zambrosi et al (2007) observed percentages higher than 40 % of AlHPO 4 + in the solution in a clayey soil treated with gypsum, with a pH value in solution close to 5.0, which was similar to that observed in the deeper soil layers in all treatments in the 1 st sampling, indicating that aside from the pH, the soil properties have a great influence on P species distribution in the soil solution.…”

Section: Discussionmentioning

confidence: 99%

“…Continued applications of PS, a multielement fertilizer, are expected to induce changes in the chemical composition and distribution of P species in the soil solution, together with crop cultivation, which can alter the concentration of elements in the soil solution by absorption and accumulation in plant tissues, by exudation of organic compounds and by changes in pH through the release of OH -or H + (Gahoonia et al, 1992). The P species in soil solution can be estimated with specific software such as Visual Minteq, since P bioavailability and mobility depend on the concentration and chemical species in the solution (Nolla and Anghinoni, 2006;Zambrosi et al, 2007;Girotto et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Effects of Pig Slurry Application and Crops on Phosphorus Content in Soil and the Chemical Species in Solution

Conti

Ceretta

Ferreira

et al. 2015

Rev. Bras. Ciênc. Solo

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the application of pig slurry rates and plant cultivation can modify the soil phosphorus (P) content and distribution of chemical species in solution. the purpose of this study was to evaluate the total P, available P and P in solution, and the distribution of chemical P species in solution, in a soil under longstanding pig slurry applications and crop cultivation. the study was carried out in soil columns with undisturbed structure, collected in an experiment conducted for eight years in the experimental unit of the universidade federal de santa maria (ufsm), santa maria (rs). the soil was an Argissolo Vermelho distrófico arênico (typic hapludalf), subjected to applications of 0, 20, 40, and 80 m 3 ha -1 pig slurry. soil samples were collected from the layers 0-5, 5-10, 10-20, 20-30, 30-40, and 40-60 cm, before and after black oat and maize grown in a greenhouse, for the determination of available P, total P and P in the soil solution. in the solution, the concentration of the major cations, anions, dissolved organic carbon (doc), and ph were determined. the distribution of chemical P species was determined by software Visual minteq. the 21 pig slurry applications increased the total P content in the soil to a depth of 40 cm, and the P extracted by mehlich-1 and from the solution to a depth of 30 cm. successive applications of pig slurry changed the balance between the

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Pig Slurry Application and Crops on Phosphorus Content in Soil and the Chemical Species in Solution

Conti

Ceretta

Ferreira

et al. 2015

Rev. Bras. Ciênc. Solo

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“…O experimento com milho avaliou seis doses de gesso agrícola (0 t ha -1 , 0,5 t ha -1 , 1 t ha -1 , 2 t ha -1 , 4 t ha -1 e 8 t ha -1 ) (16 % de enxofre e 24 % de cálcio), com aplicação de 2 t ha (Zambrosi et al 2007, Maschietto 2009). O aumento dos teores de Mg trocável em profundidade, em relação ao Ca trocável, pode estar relacionado ao fato de o Mg ser menos fortemente retido no complexo de troca, devido ao seu maior raio hidratado e menor eletronegatividade, possibilitando maior movimentação no perfil.…”

Section: Methodsunclassified

Gesso e calcário aumentam a produtividade e amenizam o efeito do déficit hídrico em milho e soja

Zandoná

Beutler

Burg

et al. 2015

Pesqui. Agropecu. Trop.

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INTRODUÇÃOO Brasil é um dos países que tem maior área agrícola cultivada em sistema plantio direto (SPD), com 31,8 milhões de hectares, que correspondem a mais da metade da área agrícola do País (Febrapdp 2012). A acidez do solo é um dos fatores mais limitantes à produtividade das culturas, no mundo (Fageria 2001), sendo a calagem utilizada para a sua correção. , com incrementos de 9,3 %, para o milho, e 11,4 % e 11,3 %, respectivamente com e sem calcário, para a soja. PALAVRAS-CHAVE:Zea mays L.; Glycine max (L.) Merrill; acidez do solo.Gypsum and lime increase soybean and maize yield and decrease drought stress During the maize and soybean cultivation process, water deficit occurs frequently and can reduce grain yield. Gypsum can be used to mitigate yield losses. This study aimed to evaluate the influence of gypsum application, with and without lime, on soil chemical properties and maize and soybean yield, in a no-till system. The experimental design was completely randomized, with six gypsum doses (0 t ha -1 , 0.5 t ha -1 , 1 t ha -1 , 2 t ha -1 , 4 t haand 8 t ha -1 ), lime application and four replications, for maize. For soybean, a 6 x 2 factorial scheme, with six gypsum doses (0 t ha -1 , 0.5 t ha -1 , 1 t ha -1 , 2 t ha -1 , 4 t ha -1 and 8 t ha -1 ), with and without lime application, and four replications was used. Soil chemical attributes and maize and soybean grain yield were evaluated. Gypsum increases the Ca 2+ levels, redistributes Mg 2+ to the 10-20 cm and 20-40 cm depth layers and decreases the Al 3+ contents in the 20-40 cm layer. Liming increases pH in the 0-10 cm depth layer and pH is not affected by the gypsum application. Gypsum increases maize and soybean grain yield, with response up to the 2 t ha -1 dose, with increments of 9.3 %, for maize, and 11.4 % and 11.3 %, respectively with and without lime, for soybean. KEY-WORDS: Zea mays L.; Glycine max (L.) Merrill; soil acidity.

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“…The effects of PG on Al 3+ have been associated with the formation of Al hydroxylated structures in the soil, as a result of ligand exchange between OH − from the surfaces of hydrated Fe or Al oxides and SO 4 2− provided by PG (Reeve and Sumner, 1972), as well as the formation of an ionic pair between Al 3+ and SO 4 2− or fluoride (F − ) (Zambrosi et al, 2007). Phosphogypsum contains approximately 15 % S and 0.6-3.2 % F, and even when considering the role of SO 4 2− in Al 3+ complexation, F − may be even more effective in this reaction (Carvalho and Raij, 1997;Zambrosi et al, 2007), which may explain why PG is more efficient than natural gypsum (gypsite) in complexing Al 3+ . In clayey Oxisols, Rampim et al (2011) and Caires et al (1999) (2) Linear adjust and R 2 value after the bar; * and **: significant at p<0.05 and p<0.01, respectively; ns: not significant.…”

Section: Chemical Properties Of Soil Fertilitymentioning

confidence: 99%

“…Concomitantly, Mg 2+ and K + -the latter only rarely -are displaced from the soil exchange sites in top layers and then move along with water to the subsurface (Caires et al, 2011b to plant roots can occur (Toma et al, 1999), due to the formation of ionic pairs between Al 3+ and the sulfate (SO 4 2− ) or fluoride (F − ) contained in PG (Zambrosi et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Do Rates and Splitting of Phosphogypsum Applications Influence the Soil and Annual Crops in a No-Tillage System?

Vicensi

Müller

Kawakami

et al. 2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:Applications of phosphogypsum (PG) provide nutrients to the soil and reduce Al 3+ activity, favoring soil fertility and root growth, but allow Mg 2+ mobilization through the soil profile, resulting in variations in the PG rate required to achieve the optimum crop yield. This study evaluated the effect of application rates and splitting of PG on soil fertility of a Typic Hapludox, as well as the influence on annual crops under no-tillage. Using a (4 × 3) + 1 factorial structure, the treatments consisted of four PG rates (3, 6, 9, ) and three split applications (P1 = 100 % in 2009; P2 = 50+50 % in 2009 and 2010; P3 = 33+33+33 % in 2009, 2010 and 2011), plus a control without PG. The soil was sampled six months after the last PG application, in stratified layers to a depth of 0.8 m. Corn, wheat and soybean were sown between November 2011 and December 2012, and leaf samples were collected for analysis when at least 50 % of the plants showed reproductive structures. The application of PG increased Ca 2+ concentrations in all sampled soil layers and the soil pH between 0.2 and 0.8 m, and reduced the concentrations of Al 3+ in all layers and of Mg 2+ to a depth of 0.6 m, without any effect of splitting the applications. The soil Ca/Mg ratio increased linearly to a depth of 0.6 m with the rates and were found to be higher in the 0.0-0.1 m layer of the P2 and P3 treatments than without splitting (P1). Sulfur concentrations increased linearly by application rates to a depth of 0.8 m, decreasing in the order P3>P2>P1 to a depth of 0.4 m and were higher in the treatments P3 and P2 than P1 between 0.4-0.6 m, whereas no differences were observed in the 0.6-0.8 m layer. No effect was recorded for K, P and potential acidity (H+Al). The leaf Ca and S concentration increased, while Mg decreased for all crops treated with PG, and there was no effect of splitting the application. The yield response of corn to PG rates was quadratic, with the maximum technical efficiency achieved at 6.38 Mg ha -1 of PG, while wheat yield increased linearly in a growing season with a drought period. Soybean yield was not affected by the PG rate, and splitting had no effect on the yield of any of the crops. Phosphogypsum improved soil fertility in the profile, however, Mg 2+ migrated downwards, regardless of application splitting. Splitting the PG application induced a higher Ca/Mg ratio in the 0.0-0.1 m layer and less S leaching, but did not affect the crop yield. The application rates had no effect on soybean yield, but were beneficial for corn and, especially, for wheat, which was affected by a drought period during growth.

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Aplicação de gesso agrícola e especiação iônica da solução de um Latossolo sob sistema plantio direto

Abstract: Gypsum application and ionic speciation of the solution from an Oxisol under no-till system RESUMO O baixo teor de Ca e a toxicidade por Al são importantes limitações à produtividade das culturas em solos ácidos brasileiros. É possível aumentar o teor de

Cited by 52 publications

References 9 publications

Effects of Pig Slurry Application and Crops on Phosphorus Content in Soil and the Chemical Species in Solution

Effects of Pig Slurry Application and Crops on Phosphorus Content in Soil and the Chemical Species in Solution

Gesso e calcário aumentam a produtividade e amenizam o efeito do déficit hídrico em milho e soja

Do Rates and Splitting of Phosphogypsum Applications Influence the Soil and Annual Crops in a No-Tillage System?

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