Effect of two types of lime on some soil physical attributes of an oxisol from Brazil

Castro, Orlando Melo de; Camargo, Otávio Antônio de; Vieira, Sidney Rosa; Filho, J Vasques

doi:10.1080/00103629909370364

Cited by 5 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For deeper soil layers (0.20–0.40 and 0.40–0.60 m), aggregate stability index data were not adjusted in a polynomial model; however, the increased proportion of WS macroaggregates in the >2.00 to 8.00 mm class promoted increases in MWD and GMD, supporting changes in soil bulk density, total porosity, and macroporosity in subsoil layers. In addition, de Castro et al (2008) suggested that liming can have a significant effect on the proportion of aggregate classes larger than >8.00 mm, including the 9.5‐ to 7.9‐ and 7.9‐ to 6.3‐mm classes. These findings may explain the benefits of lime rates greater than 2500 kg ha −1 on total porosity and macroporosity at soil layers of 0.20 to 0.60 m. Generally, our results suggest that the influence of rates on physical processes is highly complex given that various factors, such as the amount of metal‐(hydr)oxides, soil organic matter content, characteristics of organic molecules, the soil buffer capacity, ionic strength, and soil pH, are involved in the physical‐chemical reactions (Regelink et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Changes in Soil Physical Properties and Carbon Protection Mechanisms by Surface Application of Lime in a Tropical No‐Tillage System

Filho

Crusciol

Guimarães

et al. 2018

Soil Science Soc of Amer J

View full text Add to dashboard Cite

Liming helped avoid structural degradation. Liming effectively increased the stabilization of soil organic matter. More stable soil structure was achieved by liming. Long‐term no‐till soils often have layers that are severely affected by physical and chemical degradation. Soil acidity is associated with physical problems, such as higher bulk density, that restrict root growth and crop production, especially in tropical regions with dry seasons. Liming is the most common practice adopted to alleviate soil acidity, but limited information is available regarding the long‐term effect of lime applied superficially on soil physical attributes and the distribution of organic C in different aggregate size groups. In an Oxisol managed under a no‐tillage system for 12 yr, a trial was established with four lime rates (0, 1000, 2000, and 4000 kg ha–1) estimated using the base saturation method. The results showed that among the treatments, the rate calculated to increase the base saturation at 70% (2000 kg ha–1) provided a higher formation of water‐stable (WS) macroaggregates of >2.00 to 8.00 mm size class at 0‐ to 0.40‐m depth, and a significant decrease in the stability of the largest aggregates when the highest rate was applied. Increased values of mean weight diameter (MWD) and geometric mean diameter (GMD) were estimated with the application of rates varying from 1500 to 2500 kg ha–1. Liming increased carbon‐protection mechanisms, resulting in an accumulation of organic C in all aggregate size classes, mainly in the >0.105 to 0.25 and >0.25 to 2.00 mm size classes. Improving the formation of WS aggregates and total organic carbon (TOC) content with liming influenced positively the total porosity, macroporosity, and soil bulk density in the deepest soil layers (0.20–0.40 and 0.40–0.60 m).

show abstract

Section: Discussionmentioning

confidence: 99%

Changes in Soil Physical Properties and Carbon Protection Mechanisms by Surface Application of Lime in a Tropical No‐Tillage System

Filho

Crusciol

Guimarães

et al. 2018

Soil Science Soc of Amer J

View full text Add to dashboard Cite

show abstract

“…Some studies have reported enhanced aggregate stability with increased pH (Baldock et al. , 1994; Chan and Heenan, 1999; De Castro et al. , 1999), whereas another study found increased clay dispersion with lime application (Roth and Pavan, 1991).…”

Section: Introductionmentioning

confidence: 99%

Short‐term soil quality response to forage species and pH

Karki

Goodman

2011

Grass and Forage Science

View full text Add to dashboard Cite

Forages are important throughout the south-east USA for livestock production and wildlife habitat. However, little is known about how forage species commonly grown in this region influence soil-quality indicators. The objectives of this research were to determine shortterm response of soil water-stable aggregates (WSA) and density of fungal hyphae (DFH) to: (i) forage species or mixtures grown at identical soil pH levels and (ii) forage species or mixtures grown at field-state versus adjusted soil pH levels. Nine warm-season species (sole crop) and eleven cool-season sole crop or legume-grass mixtures were grown under protected culture in southern coastal plain soil microcosms. Levels of WSA and DFH, and plant shoot and root biomass were evaluated after two 12-week experimental growth periods in both field-state and adjusted-pH soil. Both warm-and cool-season forage species significantly altered short-term responses of WSA and DFH levels; these responses differed when the soil pH was adjusted from the field state with lime addition. The short-term responses of both WSA and DFH to lime addition in coastal plain soil were negative only when certain forage species were grown, and no response was detected for the control. It appeared that differences in plant shoot and root developmental characteristics played a key role in soil WSA and DFH responses to the species studied. Further long-term studies are needed to understand how these relationships are expressed in more variable environments over expanded time frames.

show abstract