Lime application in the establishment of a no-till system for grain crop production in Southern Brazil

Micronutrient availability can be affected by the increase of the soil pH due to surface liming. A field trial was carried out on a loamy, kaolinitic, thermic Typic Hapludox at Ponta Grossa, Paraná State, Brazil. The main objective was to evaluate the effects of surface liming and re-liming on the availability of micronutrients [copper (Cu), iron (Fe), manganese (Mn), and zinc (Zn)] for wheat (Triticum aestivum L.) cropped under a no-till system. A randomized complete block design was used in a split-plot arrangement. The main plots received surface lime applications (2, 4, and 6 Mg ha -1 ) in July 1993. In the subplots, surface lime (3 Mg ha -1 ) was applied again in June 2000. In 2003, before the wheat sowing, soil samples were taken at 0-5, 5-10, and 10-20 cm layers. Soil cationic micronutrients concentrations using different extractants (DTPA-TEA, Mehlich-1, HCl, and Mehlich-3) and solution/soil ratios were determined. Application of lime increased soil pH at 0-5, 5-10, and 10-20 cm. The increase in soil pH by liming did not affect soil organic carbon content. The Mehlich-3 solution had a greater capacity in extracting soil micronutrients. Increasing solution/soil ratio of the DTPA-TEA, Mehlich-1, and HCl solutions generally increased the extraction of Cu, Fe, Mn, and Zn. Liming and re-liming caused a decrease in Mn concentration in the wheat leaves. Leaf concentrations of Cu, Fe and Zn were not affected by liming treatments. The solutions of DTPA-TEA, Mehlich-1, HCl, and Mehlich-3 were ineffective to predict the soil cationic micronutrients availability for a wheat crop after surface application of lime.

Section: Soil Organic Carbon and Soil Reactionsupporting

confidence: 68%

Extraction methods and availability of micronutrients for wheat under a no-till system with a surface application of lime

Fonseca¹,

Caires²,

Barth

2010

“…Positive correlation between these two variables has been reported by several authors (Beery and Wilding, 1971;Caires et al, 2006;Liechty et al, 2005). It is expected, with the increase in soil pH, that Al 3+ precipitates, CEC increases and exchange sites be occupied by Ca 2 + and Mg 2+ released from lime or organic fertilizer (Martins et al, 2014;Matschonat and Falkengren-Grerup, 2000).…”

Section: Base Saturationmentioning

confidence: 53%

“…Thus, as verified for OM, NT had the greatest pH values, more notably in the surface layer, due to the lack of soil disturbance and fect up to a depth of 10 cm and a slower effect at deeper depths. Likewise, Caires et al (2006) noted that acidity neutralization with surface liming occurred linearly over five years, showing that the reaction of surface-applied lime is slow and gradual. Thus, there is an initial limited effect of surface liming, which is, however, compensated for by its long-term effect under NT, especially in the deeper layers.…”

Section: Soil Phmentioning

confidence: 94%

Tillage, fertilization systems and chemical attributes of a Paleudult

Dorneles¹,

Lisboa²,

Abichequer³

et al. 2015

Tillage and fertilization methods may affect soil fertility. With the aim of assessing changes in soil chemical properties over a period of ten years, soil samples of a Paleudult were collected over nine seasons at three layer depths (0-5, 5-10, 10-20 cm) and were chemically analyzed. Grain yield and nutrient export in two summer crops, soybean (Glycine max) and corn (Zea mays), in a field experiment set in Eldorado do Sul, in the state of Rio Grande do Sul, Brazil, were determined. Three soil tillage systems were evaluated, conventional (CT), reduced (RT) and no-tillage (NT), combined with mineral (lime and fertilizers) and organic (poultry litter) fertilization.The no-tillage system stood out as compared to the others, especially in the surface layer, in terms of values of organic matter, soil pH, available phosphorus, cation exchange capacity and base saturation. Phosphorus content was higher under organic than mineral fertilization due to the criteria used for the establishment of fertilizer doses. Under organic fertilization, soil pH values were similar to those obtained in limed soil samples because of the cumulative effect of the organic fertilizer. Soybean yield was lower under NT in comparison to the RT and CT systems.Consequently, soybean grain exported a lower content of nutrients than maize grain. Maize yield was not affected by either tillage or fertilization systems.

“…The sequence of crops was soybean (1998)(1999), barley (winter of 1999), soybean (1999)(2000), wheat (winter of 2000), soybean (2000-2001), corn (2001-2002), and soybean (2002-2003 Caires et al (2006a).…”

Section: Methodsmentioning

confidence: 99%

“…Regarding soil fertility management, there has been an increase in studies about liming in NT, focusing on forms and rates of application and correction of soil acidity (Alleoni et al, 2003Amaral & Anghinoni, 2001;Caires et al, 1998Caires et al, , 1999Caires et al, , 2000Caires et al, , 2004Kaminski et al, 2005). Assessments on the effects of liming on soil chemical attributes should be made in a long term basis in order to obtain the residual effects of liming (Caires et al, , 2006b. Nevertheless, studies that also focus on the soil solution under NT, especially through chemical speciation, are scarce.…”

Section: Introductionmentioning

confidence: 99%

Liming and Ionic speciation of an Oxisol under no-till system

Zambrosi

Alleoni²,

Caires³

2008

The chemical speciation of the soil solution is an important tool for evaluating nutrient availability and aluminum phytotoxicity. The effect of liming in the composition of the soil solution under the no-till (NT) system is still not well known. We evaluated the chemical speciation of Al and nutrients in the soil solution (water extract 1:1), five years after liming at the moment of the establishment of NT in a native pasture, in Ponta Grossa, Paraná State, Brazil. Dolomitic lime was applied at a rate of 4.5 t ha -1 (either incorporated or surface-applied), or split in three annual rates of 1.5 t ha CALAGEM E ESPECIAÇÃO IÔNICA DE UM LATOSSOLO SOB SISTEMA PLANTIO DIRETORESUMO: A especiação química da solução do solo é uma importante ferramenta para avaliar a disponibilidade de nutrientes e o potencial fitotóxico do alumínio. As formas em que os elementos ocorrem na solução dos solos sob sistema plantio direto (SPD) ainda são pouco conhecidas, sobretudo em áreas que receberam aplicação de calcário. Avaliou-se a distribuição das espécies químicas de alumínio e nutrientes na solução do solo (extrato aquoso 1:1), cinco anos após a aplicação de calcário, na introdução do SPD em área de pastagem nativa, em Ponta Grossa -PR. Aplicaram-se 4,5 t ha -1 de calcário dolomítico na superfície, em dose única ou parcelada durante três anos, ou com incorporação na camada de 0 -0,20 m, de um Latossolo Vermelho distrófico textura argilosa. As amostras de solo foram coletadas nas profundidades de 0 -0,05; 0,05 -0,1; 0,1 -0,2; 0,2 -0,4; 0,4 -0,6 e 0,6 -0,8 m. O alumínio (Al) ocorreu predominantemente complexado pelo carbono orgânico dissolvido (DOC) e pelo fluoreto, e em baixíssimas proporções na forma livre Al 3+ , mesmo em condições de alta acidez. Para cálcio (Ca) e magnésio (Mg), as espécies químicas que ocorreram em maiores proporções foram as formas livres (Ca 2+ e Mg 2+ ) e complexadas pelo DOC. O fósforo, além das formas livres (H 2 PO 4 -, HPO 4 2-), interagiu com alumínio (par iônico Al-H x PO 4 x ), sobretudo até 0,1 m de profundidade. A complexação do alumínio pelo carbono orgânico dissolvido não foi influenciada pela correção da acidez do solo por meio da calagem na superfície ou com incorporação. A aplicação de calcário não alterou a especiação de cálcio e magnésio na solução do solo sob sistema plantio direto. Contudo, a ocorrência das formas livres H 2 PO 4 -e HPO 4 2-foi influenciada pela calagem, havendo incremento das formas associadas com cátions. Palavras-chave: calcário dolomítico, complexos, par iônico, carbono orgânico dissolvido