Variations in soil aggregate stability and enzyme activities in a temperate agroforestry practice

Udawatta, Ranjith P.; Kremer, Robert J.; Adamson, Brandon W.; Anderson, Stephen H.

doi:10.1016/j.apsoil.2007.12.002

Cited by 113 publications

(107 citation statements)

References 34 publications

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“…The higher levels of TOC and TN found in the AF watershed may also be attributed to the relative differences in litter quality from tree, grass, and crop plants and the subsequent decomposition of the residue (Cadisch and Giller 1997;Berg and McClaugherty 2003). In the same watershed used for this research, Udawatta et al (2008) observed significantly higher soil total organic C (TOC) in the grass and agroforestry buffer areas compared to the crop areas in the top 10-cm of soil. Vegetative buffer areas had an average soil TOC of 2.26% in less than 10 years compared to 1.74% TOC in adjoining cropped areas.…”

Section: Soil Propertiesmentioning

confidence: 86%

“…Lower landscape positions often receive nutrients, carbon, and water from upper landscape positions, and usually soil moisture content is higher compared to other landscape positions. As a result of these favorable conditions, lower landscape positions often have greater CO 2 release and higher soil total organic C jong 1981;Reicosky et al 2005;Udawatta et al 2008). However, Tufekcioglu et al (2001) cited several other studies that found inconsistent results when soil CO 2 efflux rates from permanently vegetated fields were compared to cropped fields (Buyanovsky et al 1987;Beyer 1991;Lessard et al 1994;Wagai et al 1998).…”

Section: Soil Propertiesmentioning

confidence: 99%

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Soil CO2 emissions in agricultural watersheds with agroforestry and grass contour buffer strips

et al. 2009

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The potential for agricultural soils to act as a sink and sequester carbon (C) or a source and emit carbon dioxide (CO 2 ) is largely dependent upon the agricultural management system. The establishment of permanent vegetation, such as trees and grass contour buffer strips, may cause accumulation of above-and below-ground C over time, thereby acting as a sink for tropospheric CO 2 . However, the effects of contour grass strips and grass-tree strips (agroforestry) on soil CO 2 emissions have not been extensively studied in row-crop watersheds in the temperate regions. The objective of this study was to determine the effects of agroforestry and grass contour buffer strips and landscape position on soil surface efflux rate of CO 2 in three adjacent agricultural watersheds with claypan soils in northeast Missouri. The three watersheds were in a cornsoybean rotation, and contained (1) cropped only (CR), (2) cropped with grass contour strips (GR), or (3) cropped with tree-grass contour strips (AF) management systems. Soil surface CO 2 efflux was measured throughout the 2004 growing season at the upper (UBS), middle (MBS), and lower (LBS) backslope landscape positions within the three watersheds. The cumulative soil CO 2 production was lowest in the CR (0.9 kg CO 2 -C m -2 ) compared to the AF (1.5 kg CO 2 -C m -2 ) and GR watersheds (1.5 kg CO 2 -C m -2 ). The lower backslope position (1.6 kg CO 2 -C m -2 ) across all three watersheds produced 32 and 40% greater cumulative soil CO 2 than the upper and middle backslope positions, respectively. A 72-day incubation study determined the effects of 40, 60, 80, and 100% soil water-filled pore space (WFPS) and N rate (0 and 1.39 g KNO 3 kg soil -1 ) on soil CO 2 efflux from bulk soil collected under each management system. The cumulative CO 2 production was highest in the grass soil (1,279 mg CO 2 -C kg soil -1 ) compared to the agroforestry (661 mg CO 2 -C kg soil -1 ) and cropped (483 mg CO 2 -C kg soil -1 ) soils regardless of WFPS and N rate. The highest cumulative CO 2 production for the grass soil (1,279 mg CO 2 -C kg soil -1 ) occurred at 80% WFPS, and was approximately 2 to 2.6 times greater than the agroforestry and cropped soils at 80% WFPS. The results of this study indicate that conservation management practices, such as grass and grass-tree contour buffer strips, and

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Section: Soil Propertiesmentioning

confidence: 86%

Section: Soil Propertiesmentioning

confidence: 99%

Soil CO2 emissions in agricultural watersheds with agroforestry and grass contour buffer strips

et al. 2009

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“…Soils were not sampled in 2012, but it appears that the levels of available N near the shelterbelt were sustained at high enough levels to fully supply the N requirement of oat at this distance. Amounts of soil N are typically higher near the tree line than in cropped areas in agroforestry systems [33][34][35]. Even though oat did not appear to rely on direct transfer from caragana through root to root contact or mycorrhizal connections, the lack of any apparent N transfer from caragana to the oat crop at the 2 m distance was unexpected.…”

Section: Resultsmentioning

confidence: 85%

Nitrogen Transfer to Forage Crops from a Caragana Shelterbelt

Issah¹,

Kimaro

Kort

et al. 2015

Forests

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Caragana shelterbelts are a common feature of farms in the Northern Great Plains of North America. We investigated if nitrogen (N) from this leguminous shrub contributed to the N nutrition of triticale and oat forage crops growing adjacent to the shelterbelt row. Nitrogen transfer was measured using 15 N isotope dilution at distances of 2 m, 4 m, 6 m, 15 m and 20 m from the shelterbelt. At 2 m caragana negatively impacted the growth of triticale and oat. At 4 m from the shelterbelt productivity was maximum for both forage crops and corresponded to the highest amount of N originating from caragana. The amount of N transferred from caragana decreased linearly with distance away from the shelterbelt, but even at 20 m from the shelterbelt row measureable amounts of N originating from caragana were detectable in the forage biomass. At 4 m from the shelterbelt approximately 40% of the N in both oat and triticale was from caragana, and at 20 m from the shelterbelt approximately 20% of the N in oat and 8% of the N in triticale was from caragana.

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“…Valores mais elevados de atividade enzimática nas áreas com coberturas de gramíneas, relativamente a outros usos, são corroborados por vários trabalhos (Haynes & Tregurtha, 1999;Nsabimana et al, 2004;Sicardi et al, 2004), sobretudo quando comparados com cultivos anuais (Udawatta et al, 2008). Além disso, Bandick & Dick (1999) realçam a importância da grande extensão e da capilaridade do sistema radicular das gramíneas no incremento da atividade microbiana e enzimática -o que eles chamam de efeito rizosfera.…”

Section: Compartimentos Orgânicos Do Solo E Atividade Microbianaunclassified

Relações entre atributos do solo e atividade de formigas em restingas

Gomes

Barreto

Filho

et al. 2010

Rev. Bras. Ciênc. Solo

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Costa(6) , Ary Teixeira de Oliveira-Filho (7) & Nilton Curi RESUMOEm solos de restinga de constituição areno-quartzosa aumenta a influência da fração orgânica e da atividade biológica em funções-chave dos solos, como a capacidade de reciclar e armazenar nutrientes. A análise de atributos do solo e da fauna edáfica em sítios sob diferentes coberturas vegetais é importante para entender o comportamento desses ambientes. Neste estudo, avaliaram-se atributos químicos, físicos e microbiológicos do solo e suas relações com a população de formigas de sítios de restinga sob diferentes coberturas vegetais no Estado de Sergipe. Foram coletadas amostras em seis coberturas vegetais (três sítios por cobertura), sendo quatro na área Caju (mata, capim-gengibre, coqueiral e capoeira) e duas na área Pirambu (mata de topo de duna e mata de sopé de duna). As análises químicas foram feitas em amostras coletadas nas camadas de 0-5 e 5-20 cm, e a atividade microbiana, avaliada por meio da hidrólise do diacetato de fluoresceína, foi determinada em amostras coletadas a 0-10 cm. A massa de fragmentos orgânicos foi avaliada em diferentes profundidades. Na avaliação das comunidades de formigas foram consideradas aquelas com atividade na superfície do solo. Na comparação entre os sítios foi utilizada a análise de componentes principais. Os atributos de compartimentos orgânicos (C orgânico, C orgânico dissolvido e fragmentos orgânicos) foram muito sensíveis à modificação da cobertura vegetal nos sítios do Caju, isolando os sítios sob mata dos alterados e os sítios sob capim-

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Variations in soil aggregate stability and enzyme activities in a temperate agroforestry practice

Cited by 113 publications

References 34 publications

Soil CO2 emissions in agricultural watersheds with agroforestry and grass contour buffer strips

Soil CO2 emissions in agricultural watersheds with agroforestry and grass contour buffer strips

Nitrogen Transfer to Forage Crops from a Caragana Shelterbelt

Relações entre atributos do solo e atividade de formigas em restingas

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