Tree root systems and nutrient mobilization: mineral weathering by rhizospheres and deep roots

Jim Boyle; Harrison Rob; Karsten Raulund-Rasmussen; Danielle Zabowski; Inge Stupak; Ingeborg Callesen; Jeff Hatten

Abstract

Roots mobilize nutrients via deep penetration and rhizosphere processes inducing weathering of primary minerals. These contribute to C transfer to soils and to tree nutrition. Assessments of these characteristics and processes of root systems are important for understanding long-term supplies of nutrient elements essential for forest growth and resilience. Research and techniques have signifi cantly advanced since Olof Tamm’s 1934 base mineral index for Swedish forest soils, and basic nutrient budget estimates for whole-tree harvesting systems of the 1970s. Recent research in areas that include some of the world’s most productive intensively managed forests, including Brazil and the Southeast and Pacifi c Northwest regions of the United States, have shown that root systems are often several meters in depth, and often extend deeper than soil is sampled. Large amounts of carbon are also sometimes stored at depth. Other recent studies on potential release of nutrients due to chemical weathering indicate the importance of root access to deep soil layers. Release profi les clearly indicate depletion in the top layers and a much higher potential in B and C horizons. Review of evaluations of potential sustainability of nutrient supplies for biomass harvesting and other intensive forest management systems will advance understanding of these important ecosystem properties, processes, and services.

Originalsprog	Engelsk
Publikationsdato	1 okt. 2014
Antal sider	1
Status	Udgivet - 1 okt. 2014
Begivenhed	XXIV IUFRO World Congress - Salt Palace, Salt Lake City, USA Varighed: 5 okt. 2014 → 11 okt. 2014

Konference

Konference	XXIV IUFRO World Congress
Lokation	Salt Palace
Land/Område	USA
By	Salt Lake City
Periode	05/10/2014 → 11/10/2014

Emneord

Jordbundens kemi
Rødder
Skovdyrkning og -drift

Adgang til dokumentet

Callesen_roots_IFR_Special_IUFRO_CongressForlagets udgivne version, 43,3 KB

Citationsformater

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title = "Tree root systems and nutrient mobilization: mineral weathering by rhizospheres and deep roots",

abstract = "Roots mobilize nutrients via deep penetration and rhizosphere processes inducing weathering of primary minerals. These contribute to C transfer to soils and to tree nutrition. Assessments of these characteristics and processes of root systems are important for understanding long-term supplies of nutrient elements essential for forest growth and resilience. Research and techniques have signifi cantly advanced since Olof Tamm{\textquoteright}s 1934 base mineral index for Swedish forest soils, and basic nutrient budget estimates for whole-tree harvesting systems of the 1970s. Recent research in areas that include some of the world{\textquoteright}s most productive intensively managed forests, including Brazil and the Southeast and Pacifi c Northwest regions of the United States, have shown that root systems are often several meters in depth, and often extend deeper than soil is sampled. Large amounts of carbon are also sometimes stored at depth. Other recent studies on potential release of nutrients due to chemical weathering indicate the importance of root access to deep soil layers. Release profi les clearly indicate depletion in the top layers and a much higher potential in B and C horizons. Review of evaluations of potential sustainability of nutrient supplies for biomass harvesting and other intensive forest management systems will advance understanding of these important ecosystem properties, processes, and services.",

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author = "Jim Boyle and Harrison Rob and Karsten Raulund-Rasmussen and Danielle Zabowski and Inge Stupak and Ingeborg Callesen and Jeff Hatten",

year = "2014",

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T1 - Tree root systems and nutrient mobilization

T2 - XXIV IUFRO World Congress

AU - Boyle, Jim

AU - Rob, Harrison

AU - Raulund-Rasmussen, Karsten

AU - Zabowski, Danielle

AU - Stupak, Inge

AU - Callesen, Ingeborg

AU - Hatten, Jeff

PY - 2014/10/1

Y1 - 2014/10/1

N2 - Roots mobilize nutrients via deep penetration and rhizosphere processes inducing weathering of primary minerals. These contribute to C transfer to soils and to tree nutrition. Assessments of these characteristics and processes of root systems are important for understanding long-term supplies of nutrient elements essential for forest growth and resilience. Research and techniques have signifi cantly advanced since Olof Tamm’s 1934 base mineral index for Swedish forest soils, and basic nutrient budget estimates for whole-tree harvesting systems of the 1970s. Recent research in areas that include some of the world’s most productive intensively managed forests, including Brazil and the Southeast and Pacifi c Northwest regions of the United States, have shown that root systems are often several meters in depth, and often extend deeper than soil is sampled. Large amounts of carbon are also sometimes stored at depth. Other recent studies on potential release of nutrients due to chemical weathering indicate the importance of root access to deep soil layers. Release profi les clearly indicate depletion in the top layers and a much higher potential in B and C horizons. Review of evaluations of potential sustainability of nutrient supplies for biomass harvesting and other intensive forest management systems will advance understanding of these important ecosystem properties, processes, and services.

AB - Roots mobilize nutrients via deep penetration and rhizosphere processes inducing weathering of primary minerals. These contribute to C transfer to soils and to tree nutrition. Assessments of these characteristics and processes of root systems are important for understanding long-term supplies of nutrient elements essential for forest growth and resilience. Research and techniques have signifi cantly advanced since Olof Tamm’s 1934 base mineral index for Swedish forest soils, and basic nutrient budget estimates for whole-tree harvesting systems of the 1970s. Recent research in areas that include some of the world’s most productive intensively managed forests, including Brazil and the Southeast and Pacifi c Northwest regions of the United States, have shown that root systems are often several meters in depth, and often extend deeper than soil is sampled. Large amounts of carbon are also sometimes stored at depth. Other recent studies on potential release of nutrients due to chemical weathering indicate the importance of root access to deep soil layers. Release profi les clearly indicate depletion in the top layers and a much higher potential in B and C horizons. Review of evaluations of potential sustainability of nutrient supplies for biomass harvesting and other intensive forest management systems will advance understanding of these important ecosystem properties, processes, and services.

KW - Soil chemistry

KW - Rødder

KW - ???Skovdyrkning og -drift???

M3 - Conference abstract for conference

Y2 - 5 October 2014 through 11 October 2014

ER -