Root length density and carbon content of agroforestry and grass buffers under grazed pasture systems in a Hapludalf

Kumar, Sandeep; Udawatta, Ranjith P.; Anderson, Stephen H.

doi:10.1007/s10457-010-9312-0

Cited by 44 publications

(22 citation statements)

References 52 publications

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“…Better soil physical quality observed in CLF or CL may be attributed to soil resilience and restoration by wetting and drying cycles and root growth (Gregory et al, 2007). The CL (soybean and palisade) and CLF (eucalypt, soybean and palisade) systems with greater species diversity may have a better root system (Kumar et al, 2010), with a beneficial impact on soil physical quality. Silva et al (2011) observed that two years is an optimum time for management of a crop-livestock system for improving soil physical properties.…”

Section: Soil Physical Propertiesmentioning

confidence: 99%

“…Lal (2004) reported that integration of crop, livestock and forest (agroforestry) systems can accentuate SOC sequestration. Increases in the SOC concentration and pool through the use of agroforestry systems, as reported by Paudels et al (2012) in subtropical regions, as well as in some soils of tropical regions (Lima et al, 2011), have been attributed to higher root densities (Kumar et al, 2010),. However, most agroforestry studies involve fruit trees rather than timber wood species.…”

Section: Introductionmentioning

confidence: 95%

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Physical quality of an Oxisol under an integrated crop-livestock-forest system in the Brazilian Cerrado

Neto

Andrioli

Almeida

et al. 2014

Rev. Bras. Ciênc. Solo

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SUMMARYSoil physical quality is an important factor for the sustainability of agricultural systems. Thus, the aim of this study was to evaluate soil physical properties and soil organic carbon in a Typic Acrudox under an integrated crop-livestock-forest system. The experiment was carried out in Mato Grosso do Sul, Brazil. Treatments consisted of seven systems: integrated crop-livestock-forest, with 357 trees ha -1 and pasture height of 30 cm ); integrated crop-livestock-forest with 357 trees ha -1 and pasture height of 45 cm ); integrated crop-livestockforest with 227 trees ha -1 and pasture height of 30 cm ); integrated croplivestock-forest with 227 trees ha -1 and pasture height of 45 cm ); integrated crop-livestock with pasture height of 30 cm (CL 30 ); integrated croplivestock with pasture height of 45 cm (CL 45 ) and native vegetation (NV). Soil properties were evaluated for the depths of 0-10 and 10-20 cm. All grazing treatments increased bulk density (ρ ρ ρ ρ ρ b ) and penetration resistance (PR), and decreased total porosity (ƒ t ) and macroporosity (ƒ ma ), compared to NV. The values of ρ ρ ρ ρ ρ b (1.18-1.47 Mg m -3 ), ƒ ma (0.14-0.17 m 3 m -3 ) and PR (0.62-0.81 MPa) at the 0-10 cm depth were not restrictive to plant growth. The change in land use from NV to CL or CLF decreased soil organic carbon (SOC) and the soil organic carbon pool (SOC pool ). All grazing treatments had a similar SOC pool at the 0-10 cm depth and were lower than that for NV (17.58 Mg ha -1 ).Index terms: agroforestry, soil organic carbon, multivariate analysis. A qualidade física do solo é um importante fator para a sustentabilidade dos sistemas agrícolas. O objetivo desta pesquisa foi avaliar as propriedades físicas do solo e o carbono orgânico em um Latossolo Vermelho distrófico, sob sistema de integração lavoura-pecuária-floresta. O experimento foi conduzido no Mato Grosso do Sul, Brasil. Os tratamentos consistiram de sete sistemas: integração lavoura-pecuária-floresta, com 357 árvores ha -1 e altura de pastejo de 30 cm ); integração lavoura-pecuária-floresta, com 357 árvores ha -1 e altura do pastejo de 45 cm (CLF 357-45 ); integração lavoura-pecuária-floresta, com 227 árvores ha -1 e altura do pastejo de 30 cm ); integração lavoura-pecuária-floresta, com 227 árvores ha -1 e altura do pastejo de 45 cm ); integração lavourapecuária, com a altura do pastejo de 30 cm (CL 30 ); integração lavoura-pecuária, com a altura do pastejo de 45 cm (CL 45 ); e vegetação nativa (NV). As propriedades do solo foram avaliadas nas profundidades de 0-10 e 10-20 cm. Todos os tratamentos com pastagem aumentaram a densidade do solo (ρ b ) e resistência à penetração (RP) e diminuíram a porosidade total (ƒ t ) e macroporosidade (ƒ ma ), em comparação com a NV. Os valores de ρ b (1,18-1,47 Mg m -3 ), ƒ ma (0,14-0,17 m 3 m -3 ) e PR (0,62-0,81 MPa) na profundidade de 0-10 cm não foram restritivos ao crescimento de plantas. A mudança de uso do solo a partir NV para CL ou CLF diminuiu o carbono orgânico (SOC) e o estoque de carbono orgânico (SOC...

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Section: Soil Physical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Physical quality of an Oxisol under an integrated crop-livestock-forest system in the Brazilian Cerrado

Neto

Andrioli

Almeida

et al. 2014

Rev. Bras. Ciênc. Solo

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“…Plant residues were not removed while inserting the ring. At the time of infiltration measurements, gravimetric soil water content at depths of 0-10, 10-20, and 20-30 cm was taken in the area surrounding the ring from all treatments and adjusted to volumetric water content using the bulk density values extracted from Kumar et al (2010b).…”

Section: Ponded Infiltration Measurementsmentioning

confidence: 99%

“…The fitted a parameters were averaged for 0-10 and 10-20 cm depths for AgB, GB, RP and CP treatments. Saturated hydraulic conductivity (K sat ) values were obtained from Kumar et al (2010b) for comparison with field K fs values.…”

Section: Ponded Infiltration Measurementsmentioning

confidence: 99%

“…Hence, buffers were shown to improve water infiltration into the soil which would indicate less runoff from these areas compared to stocked pasture areas (RP and CP treatments). Growth and decay of tree roots (Kumar et al 2010a) under the agroforestry buffers will improve the soil carbon content and result in a greater proportion of larger pores (Kumar et al 2010b). These pores enhance soil hydraulic properties and water infiltration in the buffers as compared to pasture systems.…”

Section: Ponded Infiltration Measurementsmentioning

confidence: 99%

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Water infiltration influenced by agroforestry and grass buffers for a grazed pasture system

et al. 2012

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Agroforestry (AgB) and grass buffers (GB) are often adopted as alternative resource management tools in agroecosystems for environmental and economic benefits. The objective of this study was to compare the influence of AgB and GB systems under rotationally stocked (RP) and continuously stocked (CP) pasture systems on water infiltration measured using ponded infiltration and tension infiltration methods. Buffers were surrounded by a fence that prevented cattle from grazing within these areas. Soils at the site are Menfro silt loam (fine-silty, mixed, superactive, mesic Typic Hapludalf). Infiltration rates were measured using ponded ring infiltration units during 2 years for the four (AgB, GB, RP and CP) treatments with three replicates from two subareas within each treatment. Infiltration rate as a function of tension (at 50, 100, and 150 mm) was also measured using a tension infiltrometer. Water infiltration parameters were estimated using Green-Ampt and Parlange infiltration equations. Quasi-steady state infiltration rates (q s ) and field-saturated hydraulic conductivity (K fs ) for buffers were about 31 and 46 times higher as compared to pasture treatments, respectively. GreenAmpt and Parlange models appeared to fit measured data with r 2 values ranging from 0.91 to 0.98. The q s (measured with ponded method) in the first year for the GB treatment was the highest (221 mm h -1 ) and for the CP treatment was the lowest (3.7 mm h -1 ). For both years, estimated sorptivity (S) and saturated hydraulic conductivity (K s ) parameters were higher for buffer areas compared to the stocked pasture areas. Grazing reduced the infiltration rate for the pasture (RP and CP) treatments. Results show that the buffer areas have higher infiltration rates which imply lower runoff compared to pasture areas.

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Agroforestry for Soil Health

Udawatta¹,

Anderson²,

Kremer³

et al. 2021

North American Agroforestry

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Root length density and carbon content of agroforestry and grass buffers under grazed pasture systems in a Hapludalf

Cited by 44 publications

References 52 publications

Physical quality of an Oxisol under an integrated crop-livestock-forest system in the Brazilian Cerrado

Physical quality of an Oxisol under an integrated crop-livestock-forest system in the Brazilian Cerrado

Water infiltration influenced by agroforestry and grass buffers for a grazed pasture system

Agroforestry for Soil Health

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