Changes in Organic Matter Pools and Increases in Carbon Sequestration in Response to Surface Liming in an Oxisol under Long‐Term No‐Till

Xiao

et al. 2017

Rev. Bras. Ciênc. Solo

ABSTRACT:Residue management in cropping systems may improve soil quality. However, there are few studies on the effects of residue management on soil aggregation and carbon content in the humin (C-HUM), humic acid (C-HAF) and fulvic acid (C-FAF) fractions in South China. Therefore, the effects on soil aggregation and on the C-HUM, C-HAF, C-FAF from incorporating winter cover crop residues in a double-cropped rice (Oryza sativa L.) system in South China fields were studied. The experiment has been conducted since winter 2004. Five winter cropping systems were used: rice-rice-ryegrass (Ry-R-R), rice-rice-Chinese milk vetch (Mv-R-R), rice-rice-potato (Po-R-R), rice-rice-rape (Ra-R-R) and rice-rice with winter fallow (Fa-R-R). The results indicated that the organic C content in the paddy soil under the Ry-R-R, Mv-R-R, Po-R-R, and Ra-R-R systems was significantly higher than the content in the Fa-R-R system at the early rice and late rice maturity stages. The different sizes of aggregates under the five treatments showed similar trends. The Po-R-R systems had the highest percentage of soil aggregates in each size class and the Fa-R-R systems had the lowest percentage of soil aggregates in each size class in the 0.00-0.05, 0.05-0.10, and 0.10-0.20 m soil depth at the early rice and late rice maturity stages. The C-HUM, C-HAF, and C-FAF increased through long-term application of winter cover crop residues. Statistical analysis showed that the C-HAF under the Ra-R-R systems was significantly higher than that in the Fa-R-R systems at the early rice and late rice maturity stages. The C-FAF and C-HUM under the Mv-R-R systems was significantly higher than the C-FAF and C-HUM in the Fa-R-R systems at the early rice and late rice maturity stages. As a result, the soil organic C content, the soil aggregates in each size class, and the C-HUM, C-HAF, and C-FAF increased from application of winter cover crop residues in double-cropped rice systems.

Section: Introductionmentioning

confidence: 99%

Returning Winter Cover Crop Residue Influences Soil Aggregation and Humic Substances under Double-cropped Rice Fields

Xiao

et al. 2017

Rev. Bras. Ciênc. Solo

“…These results indicate that the action of the calcium carbonate in micron particles occurred only near the application area. Furthermore, the low amount of liming material applied (12.6 kg ha -1 at the maximum rate used) was not enough to cause significant changes in these nutrients, which usually ranges from 1 to 22 Mg ha -1 (Miranda et al, 2005;Caires et al, 2008;Briedis et al, 2012;Pagani and Mallarino, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…As a suggestion for new research application of conventional lime to the surface and liquid lime in the sowing furrow until the conventional lime has a chance to increase pH is a potential area of study. Thus, this combination with traditional liming and liquid liming can provide more promising results than simply applying liming on the soil surface, which, in NTS, takes even longer to react with the soil (Caires et al, 2008;Briedis et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…The amount of limestone applied will depend on the desired saturation bases, but it usually ranges from 1 to 22 Mg ha -1 (Miranda et al, 2005;Caires et al, 2,008;Briedis et al, 2012;Pagani and Mallarino, 2012). While the conventional liming has a particle size of 50% < 0.3 mm and 50% > 0.3 mm the micron particle has a size between from 0.0001 to 0.0002 mm.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Soil phosphorus availability and dry bean yield as affected by the application of liquid calcium carbonate micron particles on the furrow

Nascente¹,

Cobucci²

2015

Afr. J. Agric. Res.

The application of calcium carbonate micron particles in the planting furrow, because of the reduced particle size may favor a faster reaction in the soil and could provide increased pH and P availability for plants such as dry bean (Phaseolus vulgaris L.), potentially increasing yield. A field experiment was conducted for two consecutive years with the objective to evaluate the effect of the liquid calcium carbonate micron particle application in the planting furrow on soil properties (Ph, P, Ca, K and Al content and V) and on the yield components, grain yield, and concentration and content of P in dry bean. The experimental design was a randomized complete block scheme. ) and content (from 1,500 to 1,870 g ha -1) of P in the grain and grain yield (from 3,500 to 4,100 kg ha -1 ) of the dry beans increased with increasing concentration of calcium carbonate. The use of calcium carbonate micron particles in the sowing furrow is a new and effective practice that could increase crop yield in no-tillage system (NTS).

“…Além disso, a aplicação de calcário líquido, aliada à calagem tradicional, pode proporcionar resultados mais promissores do que somente a calagem tradicional. Esta, no sistema plantio direto, demora ainda mais a reagir com o solo (Caires et al, 2008;Briedis et al, 2012).…”

Section: Experimento 1 (Doses De Caco 3 )unclassified

Calcário na forma de micropartículas aplicado no sulco de semeadura aumenta produtividade do feijoeiro

Nascente

Cobucci

2015

Rev. Ceres

RESUMO A aplicação de solução de micropartículas de calcário (CaCO3) no sulco de semeadura pode alterar rapidamente os atributos químicos do solo, na zona de emissão de raízes, e aumentar a produtividade do feijoeiro-comum. O objetivo deste estudo foi o de testar essa hipótese em solos com diferentes características químicas. Foram realizados dois experimentos. No primeiro, avaliaram-se doses de soluções de CaCO3 (0, 1050, 2100, 4200, 8400 e 12600 g ha-1), aplicadas no sulco de semeadura, em dois anos agrícolas consecutivos. No segundo, o CaCO3 (1050 g ha-1) foi aplicado, ou não, no sulco de semeadura, em quatro ambientes. Os delineamentos experimentais foram em blocos ao acaso. A aplicação de solução de micropartículas de CaCO3, no sulco de semeadura do feijoeiro, aumentou os valores de pH e reduziu a saturação por Al+3 no solo. Os teores de Ca, K e a saturação por bases no solo não foram influenciadas pela adição de CaCO3 no sulco. O uso de micropartículas de CaCO3 no sulco de semeadura aumentou a produtividade de grãos do feijoeiro-comum. Os resultados sugerem que a aplicação de micropartículas de CaCO3 no sulco de semeadura foi eficiente para alterar os atributos químicos do solo no leito de semeadura e proporcionar incrementos significativos de produtividade de grãos do feijoeiro-comum.