A Solução do Solo de Um Latossolo Vermelho Distrófico Submetido a Três Tipos de Manejo de Solo e de Culturas

Spera, S. T.; Escosteguy, Pedro Alexandre Varella; Santos, H. P. dos; Klein, Vilson Antônio

doi:10.14583/2318-7670.v02n02a01

Cited by 11 publications

(14 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Maiores concentrações de nutrientes na camada superficial do solo em áreas sob "plantio direto", com ênfase para P e K, são relatadas com frequência (Rheinheimer & Anghinoni, 2001;Spera et al, 2011). Em "plantio direto", a aplicação de fertilizantes é realizada em superfície, e predominantemente no sulco de semeadura, safra após safra.…”

Section: Resultsunclassified

“…O processo de compactação desenvolve a camada subsuperficial que limita os fluxos descendente e ascendente de água e restringe o sistema radicular das plantas à camada superficial (De Maria et al, 1999;Beutler & Centurion, 2004), concentrando-o, em média, até a profundidade de 5 cm. A pronunciada concentração de nutrientes na camada superficial do solo (Selles et al, 1997;Spera et al, 2011;Nunes et al, 2011;Costa et al, 2009) também pode ser avaliada como fator da restrição de raízes até essa profundidade.…”

Section: Introductionunclassified

See 1 more Smart Citation

Efeito de semeadora com haste sulcadora para ação profunda em solo manejado com plantio direto

Nunes

Denardin

Faganello

et al. 2014

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

RESUMOA adoção do plantio direto na região subtropical úmida do Brasil, fundamentada apenas em dois preceitos da agricultura conservacionista -mobilização de solo restrita à linha de semeadura e manutenção de resíduos culturais na superfície do solo -, tem induzido à estratificação de atributos químicos do solo na camada de 0-20 cm profundidade e degradação física da camada subsuperficial (entre aproximadamente 5-20 cm de profundidade), que podem contribuir para frustrações de safras agrícolas, quando da ocorrência de estiagens. O objetivo deste trabalho foi avaliar o efeito residual de uma semeadora/adubadora, equipada com elemento rompedor de solo tipo haste sulcadora, atuando em quatro profundidades para a semeadura de milho (Zea mays L.), na mitigação de problemas de ordem física e química, em um Latossolo Vermelho distrófico húmico, manejado em plantio direto há mais de 10 anos. Os tratamentos avaliados foram: T 1 = hastes sulcadoras atuando até 5 cm de profundidade; T 2 = hastes sulcadoras atuando até 10 cm de profundidade; T 3 = hastes sulcadoras atuando até 15 cm de profundidade; e T 4 = hastes sulcadoras atuando até 17 cm de profundidade. O efeito desses tratamentos sobre os atributos físicos do solo foi avaliado pela técnica do perfil cultural associada à determinação da densidade, porosidade total, macroporosidade e resistência do solo à penetração, aos oito e 12 meses, após a semeadura da cultura de milho. Sobre os atributos químicos, esses efeitos foram avaliados pela determinação de pH em H 2 O, P e K disponíveis, Ca, Mg e Al trocáveis, acidez potencial e matéria orgânica, em amostras de solo coletadas em camadas de 2,5 cm de espessura, de 0-22,5 cm de profundidade. A utilização da semeadora/adubadora, equipada com elemento(1) Recebido para publicação em 11 de junho de 2013 e aprovado em 10 de janeiro de 2014.

show abstract

Section: Resultsunclassified

Section: Introductionunclassified

Efeito de semeadora com haste sulcadora para ação profunda em solo manejado com plantio direto

Nunes

Denardin

Faganello

et al. 2014

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

show abstract

“…Since in Brazil and other South American countries NT is used uninterruptedly, there is no periodic soil tillage, the accumulation of crop residues in the topsoil and the addition of lime and fertilizers to the surface intensifies soil stratification over time, leading to the accumulation of organic C and N (Ebeling et al, 2008;Venzke Filho et al, 2008), as well as P, K + , Ca 2+ and Mg 2+ to depths of 0.0-0.10 m (Klein et al, 2007;Spera et al, 2011;Acqua et al, 2013;Kramer et al, 2014). Since the vertical mobility of lime is reduced in NT, the subsurface soil changes to a more acidic environment with higher concentrations of exchangeable aluminum (Al 3+ ) (Raij et al, 1998;Ernani et al, 2001), creating a chemical limitation to root growth.…”

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

View full text Add to dashboard Cite

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.

show abstract

“…In general, no-tillage system can reduce Al 3+ content and reduce Al 3+ toxicity by adding dissolved organic carbon to the soil (Spera et al, 2014). Long-term studies show that the decomposition of plant residues contributes to the neutralization of H + ions and organic complexation of Al 3+ , increasing soil pH (Miyazawa et al, 1993;Bressan et al, 2013).…”

Section: Other Soil Chemical Propertiesmentioning

confidence: 99%

Chemical attributes of agricultural soil after the cultivation of cover crops

Sousa¹,

Medeiros²,

Rosa³

et al. 2017

Aust J Crop Sci

View full text Add to dashboard Cite

The use of cover crops is a strategy to maintain the productive capacity of agricultural soils. The increase of organic carbon content, nutrient cycling and, consequently, the increase in soil fertility are some of the greatest benefits. This study evaluated the chemical attributes of the soil after the use of cover crops species in the Cerrado region of Piaui. The experiment was carried out from January 2015 to July 2016. It was performed in a completely randomized block design with eleven treatments and four replicates. ), potential acidity (H + Al), soil organic carbon (OC), the saturation of bases (V%), saturation by aluminum (m%) and effective CEC were measured. Fifteen months after their establishment, cover crops positively influenced the levels of P, K and OC with no changes in the other chemical properties. The OC contents were higher with the use of C. cajan -cv. 'fava larga', brachiaria and C. ochroleuca + millet, mainly in the topsoil. C. espectabilis, spontaneous vegetation, M. aterrima, brachiaria and C. ochroleuca were the most efficient in K cycling.

show abstract

A Solução do Solo de Um Latossolo Vermelho Distrófico Submetido a Três Tipos de Manejo de Solo e de Culturas

Cited by 11 publications

References 19 publications

Efeito de semeadora com haste sulcadora para ação profunda em solo manejado com plantio direto

Efeito de semeadora com haste sulcadora para ação profunda em solo manejado com plantio direto

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

Chemical attributes of agricultural soil after the cultivation of cover crops

Contact Info

Product

Resources

About